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CHAPTER 1. SPECIFICATION[1] SPECIFICATION............................................ 1-1[2] EXTERNAL DIMENSION............................... 1-2[3] WIRING DIAGRM .......................................... 1-3[4] ELECTRICAL PARTS .................................... 1-3
CHAPTER 2. EXPLAMATION OF CIRCUIT AND OP-ERATION[1] BLOCK DIAGRAMS....................................... 2-1[2] MICROCOMPUTER CONTROL SYSTEM........ 2-3[3] FUNCTION..................................................... 2-8
CHAPTER 3. FUNCTION AND OPERATION OF PRO-TECTIVE PROCEDURES[1] PROTECTION DEVICE FUNCTIONS AND
OPERATIONS................................................ 3-1[2] AIR CONDITIONER OPERATION IN
THERMISTOR ERROR ................................. 3-3[3] THERMISTOR TEMPERATURE CHAR-
ACTERISTICS ............................................... 3-5
[4] HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY ...............................3-6
[5] GENERAL TROUBLESHOOTING CHART........3-6[6] MALFUNCTION (PARTS) CHECK METH-
OD .................................................................3-8[7] OUTDOOR UNIT CHECK METHOD...........3-10[8] TROUBLESHOOTING GUIDE ....................3-13
CHAPTER 4. REFRIGERATION CYCLE[1] FLOW FOW REFRIGERANT ........................4-1[2] STANDARD CONDITION..............................4-1[3] TEMPERATURE AT EACH PART AND
PRESSURE IN 3-WAY VALVE ......................4-1[4] PERFORMANCE CURVES...........................4-2
REPLACEMENT PARTS LIST
SERVICE MANUAL
CONTENTS
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining thesafety and performance of the set.
This document has been published to be used forafter sales service only.The contents are subject to change without notice.
TopPage
AYXP9FRN
SPLIT TYPEROOM AIR CONDITIONER
INDOOR UNIT
AY-XP9FR-NOUTDOOR UNIT
AE-X9FR-N
MODELS
In the interests of user-safety (Required by safety regulations in somecountries) the set should be restored to its original condition and onlyparts identical to those specified should be used.
AYXP9FRN
AYXP9FRN Service Manual CHAPTER 1. SPECIFICATION[1] SPECIFICATION
1. AY-XP9FR-N – AE-X9FR-N
NOTE: The condition of star”✩” marked item are ‘ISO5151’ : 1994(E), contition T1.
MODEL INDOOR UNIT OUTDOOR UNITITEMS AY-XP9FR-N AE-X9FR-NCooling capacity(Min. > Max.) kW 2.50 (0.9 - 3.0)Heating capacity(Min. > Max.) kW 3.20 (0.9 - 5.0)Moisture removal(at cooling) Liters/hElectrical dataPhase SingleRated frequency Hz 50Rated voltage V 230Rated current ✩(Min - Max.)
Cool A 2.8 (0.8 - 3.8)Heat A 3.4 (0.7 - 5.9)
Rated input ✩(Min - Max.)
Cool W 540 (150 - 750)Heat W 700 (130 - 1300)
Power factor ✩ Cool % 84Heat % 90
Compressor Type Hermetically sealed rotary typeModel 5RS092XDFOil charge 320cc (RB68A or Freil Alphc 68M)
Refrigerant system Evaporator Louver Fin and Grooved tube typeCondenser Corrugate Fin and Grooved tube typeControl Expansion valveRefrigerant (R410A) 1000gDe-lce system Micro computer controled reversed systems
Noise level(at cooling)
High dB(A) 42 46Low dB(A) 37 –Soft dB(A) 26 –
Fan systemDrive Direct driveAir flow quantity(at cooling)
High m3/min. 10.3 28.1Low m3/min. 8.2 –Soft m3/min. 5.1 –
Fan Cross flow fan Propeller fanConnectionsRefrigerant coupling Flare typeRefrigerant tube size Gas, Liquid 3/8", 1/4"Drain piping mm O.D φ18OthersSafety device Compressor: Thermal protector
Fan motors: Thermal fuseFuse, Micro computer control
Air filters Polypropylene net (Washable)Net dimensions Width mm 790 780
Height mm 278 540Depth mm 198 265
Net weight kg 10 37
1 – 1
AYXP9FRN
[2] EXTERNAL DIMENSION1. Indoor unit
2. Outdoor unit
278
198790
22.0
58 18.5
175
INVERTER AIR CONDITIONER
265
780
540
14
165
540
299
72
58
37.512 4.5
324
135
81 136
1 – 2
AYXP9FRN
[3] WIRING DIAGRM1. Indoor unit
2. Outdoor unit
[4] ELECTRICAL PARTS
1. Indoor unit
2. Outdoor Unit
DESCRIPTION MODEL REMARKSIndoor fan motor MLB084 DC MotorIndoor fan motor capacitor – –Transformer – –FUSE1 – QFS-GA062JBZZ (250V, 3.15A)FUSE2 – QFS-GA063JBZZ (250V, 2A)
DESCRIPTION MODEL REMARKSCompressor 5RS092XDF D.C. brush-less motorOutdoor fan motor ML-A902 DC MotorOutdoor fan motor capacitor – –Fu4 – QFS-GA064JBZZ(250V, 1A)Fu3 – QFS-GA051JBZZ(250V, 2A)Fu2 – QFS-GA052JBZZ(250V, 3.15A)Fu1 – QFS-CA001JBZZ(250V, 20A)Fu5, 6 – QFS-CA002JBZZ(250V, 15A)
1 – 3
AYXP9FRN
AYXP9FRN Service Manual CHAPTER 2. EXPLAMATION OF CIRCUIT AND OPERATION[1] BLOCK DIAGRAMS
1. Indoor unit
Louvre motor drive circuit(upper)
Louvre motor drive circuit(lower)
LED drive circuit
Flow direction control (louver motor upper)
Flow direction control (louver motor lower)
LED display
AC powerRectification circuit
CPU
SubCPU
3.15AFuse
Serial signals
2AFuse
DC power supply circuit
Fan motor PWM control circuit
Rotation pulse input circuit
AC clock circuit
Remote controller signal reception circuit
Buzzer drive circuit
CPU reset circuit
CPU oscillator circuit
Room temp. detect circuit
Heat exchanger pipe thermo circuit
EEPROM
Select circuit
Serial I/O circuit
Power supply relay drive circuit
Auto restart circuit
Test run circuit
Auxiliary mode
Power on circuit
Cluster generator drive circuit
Indoor fan motor
Fan motor pulse detect
Wireless remote control operation
Audible operation confirmation
Room temp. thermistor
Heat exchanger pipe thermistor
Louvre angle, fan speed
Wireless, preheat, Model select
Indoor/outdoor control signal I/O
Outdoor unit power supply on/off control
Test run (forced operation)
Auxiliary mode button ON/OFF
Self diagnostics, fault diagnosis
Cluster generator
Unit-unit wiring(AC power andserial signals)
2 – 1
AYXP9FRN
2. Outdoor unitCPU
20Aprotection
15Aprotection
Expansion valve drive circuit Expansion valve
Suction temp. thermo. circuit Suction pipe thermistor
2-way valve temp. thermo. circuit 2-way valve thermistor
3.15Aprotection
15Aprotection
Power supply circuit
CPU oscillator circuit
DC overvoltage detection circuit
Outdoor fan drive circuit
4-way valve relay drive circuit
Power transistor module drive circuit
Serial I/O circuit
CPU reset circuit
Position detection circuit
AC overcurrent detection circuit
Compressor thermo circuit
Heat exchanger pipe thermo circuit
Outdoor temp. thermo. circuit
LED drive circuit
Test mode circuit
Power factorconverter circuit
Filtercircuit
Smoothingcircuit
Pulse amplitube modulation circuit
EEPROM
AC clock circuit
DC overcurrent detection circuit
IGBT
Unit-unit wiring (AC powerand serial signals)
Outdoor fan
4-way valve
Power transistor module
Compressor
Current transformer
Compressor thermistor
Heat exchanger pipe thermistor
Outdoor temperature thermistor
LED
2 – 2
AYXP9FRN
[2] MICROCOMPUTER CONTROL SYSTEM1. Indoor unit
1.1. Electronic control circuit diagram
0.1μC 50
V
JPF
54
21
54
21
4.7KRN
2.4K5V 10.0KFR96
JPT
9 10 11 12
CIR
CU
ITD
IAG
RAM
DIS
PLAY
PWB
LOU
VER
MO
TOR
TOP
LOU
VER
MO
TOR
BOTT
OM
DR
AIN
PAN
ASS'
Y
MO
TOR
FAN
DC
AUX.
SW1
(TES
TR
UN
)
PIPE
THER
MO
TEM
PTH
ERM
O
POW
ERO
N
10K
R52
(HA
CIR
CU
IT)
AUTO
RES
TAR
T
PREH
EAT
WIR
ELES
S
HO
TKE
EP
FLAS
H
TEST
SUB
MIC
RO
CO
MPU
TER
PWB
REC
EIVE
RPW
B7
-SEG
LED
&
REM
OTE
CO
NTR
OLL
ER SIG
NAL
SER
IAL
SIG
NAL
S
OF
SER
IAL
ERR
OR
SIG
NAL
SUB
MIC
RO
CO
MPU
TER
POW
ERSU
PPLY
OF
12V
LIN
EG
ND
for
GN
Dfo
r5V
LIN
E
CO
NN
ECTO
RO
FJO
INT
(DR
AIN
PAN
)
CO
NN
ECTO
RO
FJO
INT
(FAN
MO
TOR
)
33
98
76
101
23
45
8
R4156k
5V
23 1
4 32
R38100k
C1835V100μ
R39
ZD2HZ24-2
41 4.7k
D1N60D7
R37 RD
4
21
30.
1μC42
25V
12V
R44
1.8k
1/4W
C2116V47μ
R70
Q3
KRC
108S
4.7k
4.7k
(SER
IAL
I/OC
IRC
UIT
)
KRA1
01S
Q11
5V
5VJP
H
R53
JPO
10K
ACC
LOC
K
25V
R90
R55
FU1
3.15
A-2
50V
C57
R85
10K
50V
1000
p
C20250V0.01μ
5V
JPS
470μ
D2S
6M
MQ
R27
10K
10k
R71 1k
1k
R336.8k
8.2k
680
PC5
R34
6.8k
89
5V
12V
87654321
86
75
43
21
1 3 5 7 9
2 4 6 8 10
1112
1 3
5VVs
VccPG
GN
DVm
3 12577 5 2 13
3 1257
PC3
BCN
5
BCN
1 PC81
716P
1210
111
23
45
67
89 9
87
65
43
21
1110
1210
111
23
45
67
899
87
65
43
21
1110
7654321
BCN
7
KRC
102S
Q15
PC1
PC81
7XP3
C16
50V
0.01
μ
10K
R16
275V
0.01
μ
C23
2.7K
RH
RE
R76
100
1W
SSR
12V
2W11K
2W11K
PC2
PC85
3HXP
2W680
680 2W
2W680
680 2W
2W680
D8
D1N
60R
GR
40R
BR
CR
A
C14275V0.1μ
NF1
NR1
200K
200K 39
K
D3
D1N
60
1/2WR26
1/2WR25 R24
C45275V0.1μ
E25
0V47
00p
C53
~C56
C54
C53
C56
C55
CN
801
23
4
BUSY
7654321 8
VPP
VCC
SCL
SDA
OE
RES
ET
9VS
S
5V
321
C90
HAJ
P
4
CN
90R
92
R91
100kR93
1000
p50
V
5V
5V
100μ
C350V
R95
4.7K
R69100K
R684.7K
100μ
DC
15V
D2S
BA60
5V
C2425V
0.1μR
46
DB1
C1
3.3
450V120μ
1M
R2 RF1/2W
1M1/2W
4 321
5V
PC81
7XP3
3.3KR66
100KR73
35VC46
25VC50
0.1μ
0.1μ50VC47
R28
R31
56k
2A-2
50V
142
3
14
5V
FU2
5WR1
47kR67
10kR50
0.1μC
5225
VC
37
0.1μ25
V
5V
JPW
JPP
R87
R86
10K
10K
C26
4.7μ
IC2
RES
ET
0V
ZD1
ST03
D-2
00
5V
1/4W
100
R561/4W
100
R51
C39
16V
0.01
μ
C36
0.01
μ16
V
10K
10K
10K
CN
4
R58
R54
R59
10.0KF
16V10μC31
R61
16V10μC30
R60
34TH
1
12TH
2
321
5V
21
4 3
D1F
S4
0.1μ50
VC4
C44
220μ
10V
C7
470μ
10V
25V
C43
12V IC9
10μHL1
D14 D
1
TR1
6 5 4 3 2 1 4
34
12
IC108
765
EEPR
OM
R97
5V
R47
3
3.3k 2
R29
PC4
R32
C17
0.01μ16V
IC1
64636261605958575655545352515049 P37
P36P35P34P33P32P31P30VCC
VRVSSP67P66P65P64P63
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
3348 47 46 45 44 43 42 41 40 39 38 37 36 35 34
P20P21P22P23P24P25P26P27VSSXOUXINP40P41RSTVSSP42
20212223242526272829303132
191817
P43
P44
P45
P46
P47
P50
P51
P52
P53
P54
P55
P56
P57
P60
P61
P62
161 2 3 4 15141312111098765
R35
10k 5V
R36
C22
PC81
7XP3
R30
16V0.01μ
4.7K
1000
p50
VC
32
5V
KRC
102S
Q19
C2510V
100μ
C27
16V
0.01
μ4.
7kR
45
R94
5V
10k
R48
C331
3
2OSC
1 8MH
z
KRC
108S
Q1
10.0KF
1 N1 3 65
N S
321
5 6
CN
A
3112
V
IN
RY1
(CLU
STER
)C
ON
NEC
TOR
OF
JOIN
TO
UT
N12
R191/2W470K
R19A1/2W470K
3W11
K3W 11K
C98
C99
1KV
1000
pC
98,C
99
KID
6500
4AF
12V
C1950V0.047μ
IC6
BZ
GEN
ERAT
OR
CLU
STER
4.7K
33p
2KV
RM
1500
p
10KF
15V
100p
F
15KF
1.5KR10
1000
0pM
R17
12
680
PC81
7XP3
PC9
4.7K
R4
3.3KR75
910
1/4WR20
1/4WR23
910
R22
R3
R65
R5
ZD5
C12
50VC5
50VC2
100μ
D2
D1F
L20U
D1F
L20U
C35
IC3
1 2
5 34
R7 10
00p
50VC40
10K
D1F
L20UD
15
D21
KRA1
06S
IC7
R57
D20
D1F
L20U
Q9
PC81
7XP3
1KR81
2.4K
FR8
2.4K
FR11
R80
PC6
1KR9
PC817XP3
R6
100K
PC81
7XP3
R13
100K
PJ43
1CT
250VC48
PC6
PC7
R17
1K
R984.7K
R89 1K
100V
1.2K
C49
11KF
30KF
L2KI
A781
5API
1SR
139D
2 – 3
AYXP9FRN
1.2. Display circuit diagram12V
KID
6500
4AF
M5V
M5V
M5V
M5V
7654321
10 111 2 3 4 5 6 7 8 9
12V
12V
5V
KID
6500
4AF
CN
103
CN
102
IC10
5
IC10
6
CN
101
IC10
4
13
28M
Hz
P30
19P3
120
P32
21P3
322
P34
23P3
524
P36
25P3
726
P00
27P0
128
P02
29P0
330
P04
31P0
532
P06
33P0
734
P10
35P1
136
Vss
18Xo
ut17161 2 3 4 15141312111098765
P12
P13
P14
P20
P21
P22
P23
P24
P25
P26
P27
Vref
RES
ETC
NVs
sVc
cXi
n
IC10
1M
3754
2
OSC
101
0.1μ25
VC
101
C10
2
4.7μ
IC10
2
0.1μ25V
C10
3
C10
416
V47
μ
IC10
3
KID
6578
3AF
R10
1
R10
2
R10
3
R10
4
R10
5
R10
6
R10
71W18
0*7
FLASH
4.7KR115
4.7K
R10
8
R11
810
KR
116
100K
KRA1
06S
KRC
106S
KRA1
06S
R109
R113R110
R114
1/4W
1.2K
*4
LED
LED
LED
LED
LED
LED
LED
LED
LED
LED
LED
101
102
103
104
105
106
107
108
109
110
PC
CN
105A
CN
104B
CN
104A
a b c d e f g
SG20
1
Q10
2Q
101
Q10
4
KRC
106S
Q10
3
CN
105B
CN
105C
1 2 3
25V
R20
147
IC20
1
REC
EIVE
RC
IRC
UIT
SUB
MIC
RO
CO
MPU
TER
PWB
CIR
CU
ITD
AIG
RAM
12345
LOU
VER
MO
TOR
BOTT
OM
LOU
VER
MO
TOR
TOP
SER
IAL
SIG
NAL
S
REM
OTE
CO
NTR
OLL
ERSI
GN
ALS
ERR
OR
SIG
NAL
OF
SER
IAL
POW
ERSU
PPLY
OF
SUB
MIC
RO
CO
MPU
TER
5VLI
NE
GN
Dfo
r
12V
LIN
EG
ND
for
7-S
EGLE
D&
REC
EIVE
RPW
B
GN
Dfo
r12
VLI
NE
GN
Dfo
r5V
LIN
E
12V
LIN
EG
ND
for
12V
LIN
EG
ND
for
GN
Dfo
r12
VLI
NE
12V
LIN
EG
ND
for
JP1
GN
Dfo
r5V
LIN
E
DIS
PLAY
PWB
( )B L U E
SIG
NAL
SR
EMO
TEC
ON
TRO
LLER
GP1
U26
1RK
111B
(COM)5
(COM)10
7(A1)
6(B1)
4(C1)
1(D1)
3(E1)
8(F1)
9(G1)
2(H1)
7(A2)
6(B2)
4(C2)
1(D2)
3(E2)
8(F2)
9(G2)
2(H2)
c d e f g
JP2
0.22
μ50
VC
105
KRC
106S
Q10
5
1K
5V
R11
9
25V
C20
247
μ16
VC
201 0.1μ
+
C2
C1
H2
H1
B2B1
F2F1
E2E1
D2
D1
G2
G1
A2A1
a
b
c
d
e
f
g
g
f
e
d
c
b
a
RES
ET
987654321 12111010 11 121 2 3 4 5 6 7 8 9
10 9 8 7 6 5 4 3 2 1
543211 2 3 4 5
KID
6500
4AF
12V
12V
8
7
6
5
4
3
2
1
9
1 2 3 4 5 6 7 8
12V
5V
2 – 4
AYXP9FRN
1.3. Printed wiring board2 – 5
AYXP9FRN
2. Outdoor unit2.1. Electronic control circuit diagram
9.53
KFR84
0V
Q10
0V
15V
0.01
μ
10V
47μ
6.8K
J
R85
C77
R86
C78
2A25
0VFU3
754321
0VC
N30.1μ40
0VC29
0V
5V
R83
10K
RY1
123456
0VIC
7
Ma
b
5V
10K
10K
0V
j
0V
JP1
JP2
c
JPF
0V10
0μ
C94
10V
C95 0.1μ
0.1μ
10K
R37
1K
R38
1K
R36
1K
0VUVW
C34C35C36
1000
Px
3
D7
D6
TR1
R29
4.7K
68
18V
-PC
850.
1μ
R82
680μ
C19
IC3
R27 1W
IC4
5V 0V
R22
25V
C20
R21
22K
R24
10K
R87
150μ
C84
D14
9
35V
0V-P
35V
R93
R94
R92
D20
C98
3
2
1R
78IC
5
C33
R77
50V
1μ
R79
100
0.1μ
C32
0V
QS
T
R
Q3
R S T9
Q
JP10
1 2 3 4 5 6 7 8
8
5 6 11 10
7
1K 10K
9
8
Q9
0V
2.2KR32R31
0V
R33
IC6
875 6
124 3
CN
E
5VR
30
4 3 12
4.7K
13V
CN
12
EXPA
NSI
ON
VALV
CO
IL
MR
Y1
13V
C38
0.1μ
24272322212818161315124 1079613
10K
R45
5V
100μC47
1000
PC
42
C48
10V
0.1μ
0V
IPM
330μ
25V
C37
100μ 25
VC
490.
1μ
25V
C51
0.1μ
C54
100μ 25
VC
530.
1μ
0.1μ
0.1μ
C55
0.1μC
57
C45
0.1μ
C56
D9
D10
100μC52D
8
C50
VWFB
VUFS
VUFB W
NVNUNWP
VPI
VWFSVP
I
VPI VP
VVFS
VVFBU
P
VNC F0VNI
C41
1000
P
1000
PC40
C43
1000
P
C44
1000
PC39
1000
P
1KR46
ZD4
16V
10μ
x5
C70
~74
10K
x5
R63
~67
0V
0VC
N8
1065432 7 980.
01μ
x5
C65
~69
5V
TH2
TH3
TH4
TH5
133
0KR
100
R10
7
PC4
330
Q7 KR
C10
5S
1000
PC
59
1/2W
R51
~53
IPM
c6 58
5WR49
2 3 TLP3
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2 – 6
AYXP9FRN
2.2. Printed wiring board2 – 7
AYXP9FRN
[3] FUNCTION1. Function
1.1. Startup controlThe main relay remains off during the first 45 seconds (first safetytime) immediately after the power cord is plugged into an AC outlet inorder to disable outdoor unit operation and protect outdoor unit electriccomponents.
1.2. Restart controlOnce the compressor stops operating, it will not restart for 180 sec-onds to protect the compressor.
Therefore, if the operating compressor is shut down from the remotecontrol and then turned back on immediately after, the compressor willrestart after a preset delay time.
(The indoor unit will restart operation immediately after the ON switchis operated on the remote control.)
1.3. Cold air prevention controlWhen the air conditioner starts up in heating mode, the indoor unit fanwill not operate until the temperature of the indoor unit heat exchangerreaches about 23°C in order to prevent cold air from blowing into theroom.
Also, the indoor unit fan operates at low speed until the temperature ofthe indoor unit heat exchanger reaches about 38°C so that people inthe room will not feel chilly air flow.
1.4. Odor prevention controlWhen the air conditioner starts up in cooling mode, the discharged airtemperature is lowered slightly, and for the reduction of unpleasantodors the operation of the indoor unit fan is delayed 60 seconds if theautomatic fan speed mode in cooling mode is set.
1.5. Indoor unit heat exchanger freeze prevention controlIf the temperature of the indoor unit heat exchanger remains below0°C for 4 consecutive minutes during cooling or dehumidifying opera-tion, the compressor operation stops temporarily in order to preventfreezing.
When the temperature of the indoor unit heat exchanger rises to 2°Cor higher after about 180 seconds, the compressor restarts andresumes normal operation.
1.6. Outdoor unit 2-way valve freeze prevention controlIf the temperature of the outdoor unit 2-way valve remains below 0°Cfor 10 consecutive minutes during cooling or dehumidifying operation,the compressor operation stops temporarily in order to prevent freez-ing.
When the temperature of the 2-way valve rises to 10°C or higher afterabout 180 seconds, the compressor restarts and resumes normaloperation.
1.7. Indoor unit overheat prevention controlDuring heating operation, if the temperature of the indoor unit heatexchanger exceeds the indoor unit heat exchanger overheat preven-tion temperature (about 45 to 54°C) which is determined by the operat-ing frequency and operating status, the operating frequency isdecreased by about 4 to 15 Hz. Then, this operation is repeated every60 seconds until the temperature of the indoor unit heat exchangerdrops below the overheat protection temperature.
Once the temperature of the indoor unit heat exchanger drops belowthe overheat protection temperature, the operating frequency isincreased by about 4 to 10 Hz every 60 seconds until the normal oper-ation condition resumes.
If the temperature of the indoor unit heat exchanger exceeds the over-heat protection temperature for 60 seconds at minimum operating fre-quency, the compressor stops operating and then restarts after about180 seconds, and the abovementioned control is repeated.
1.8. Outdoor unit overheat prevention controlDuring cooling operation, if the temperature of the outdoor unit heatexchanger exceeds the outdoor unit heat exchanger overheat preven-tion temperature (about 55°C), the operating frequency is decreasedby about 4 to 15 Hz. Then, this operation is repeated every 60 sec-onds until the temperature of the outdoor unit heat exchanger drops toabout 54°C or lower.
Once the temperature of the outdoor unit heat exchanger drops toabout 54°C or lower, the operating frequency is increased by about 4to 10 Hz every 60 seconds until the normal operation conditionresumes.
If the temperature of the outdoor unit heat exchanger exceeds the out-door unit heat exchanger overheat protection temperature for (120 sec: outdoor temperature ≥ 40°C • 60 sec : outdoor temperature < 40°C)at minimum operating frequency, the compressor stops operating andthen restarts after about 180 seconds, and the abovementioned con-trol is repeated.
1.9. Compressor overheat prevention controlIf the temperature of the compressor exceeds the compressor over-heat prevention temperature (110°C), the operation frequency isdecreased by about 4 to 10 Hz. Then, this operation is repeated every60 seconds until the temperature of the compressor drops below theoverheat protection temperature (100°C).
Once the temperature of the compressor drops below the overheatprotection temperature, the operating frequency is increased by about4 to 10 Hz every 60 seconds until the normal operation conditionresumes.
If the temperature of the compressor exceeds the overheat protectiontemperature (for 120 seconds in cooling operation or 60 seconds inheating operation) at minimum operating frequency, the compressorstops operating and then restarts after about 180 seconds, and theabovementioned control is repeated.
Compressor operation
ON operation onremote control
OFF operation onremote control
Compressor ON
Compressor ON Compressor canturn ONCompressor remains OFF
for 180 seconds
Indoor unit heat exchanger temperature
38
23
35
21
Set fan speed
Indoor unit fan at low speed
Indoor unit fan in non-operation
2 – 8
AYXP9FRN
1.10. Startup controlWhen the air conditioner starts in the cooling or heating mode, if theroom temperature is 2°C higher than the set temperature (in coolingoperation) or 3.5°C lower (in heating operation), the air conditioneroperates with the operating frequency at maximum. Then, when theset temperature is reached, the air conditioner operates at the operat-ing frequency determined by fuzzy logic calculation, then enters thenormal control mode after a while.1.11. Peak controlIf the current flowing in the air conditioner exceeds the peak controlcurrent (see the table below), the operation frequency is decreaseduntil the current value drops below the peak control current regardlessof the frequency control demand issued from the indoor unit based onthe room temperature.
1.12. Outdoor unit fan delay controlThe compressor stops immediately after cooling, dehumidifying orheating operation is shut down, but the outdoor unit fan continuesoperation for 50 seconds before it stops.
1.13. Defrosting
1.13.1 Reverse defrostingThe defrost operation starts when the compressor operating timeexceeds 20 minutes during heating operation, as shown below, andthe outside air temperature and the outdoor unit heat exchanger tem-perature meet certain conditions. When the defrost operation starts,the indoor unit fan stops. The defrost operation stops when the out-door unit heat exchanger temperature rises to about 13C or higher orthe defrosting time exceeds 10 minutes.
1.14. ON timerThe ON timer can be activated by pressing the ON timer button. Whenthe ON timer is activated, the operation start time is adjusted based onfuzzy logic calculations 1 hour before the set time so that the roomtemperature reaches the set temperature at the set time.
1.15. OFF timerThe OFF timer can be activated by pressing the OFF timer button.When the OFF timer is set, the operation stops after the set time.
When this timer is set, the compressor operating frequency lowers forquieter operation, and the room temperature is gradually varied afterone hour (reduced 1°C three times (max. 3°C) in heating, or increased0.3°C three times (max. 1°C) in cooling or dehumidifying operation) sothat the room temperature remains suitable for comfortable sleeping.
1.16. Power ON startIf a jumper cable is inserted in the location marked with HAJP on theindoor unit control printed circuit board (control PCB), connecting thepower cord to an AC outlet starts the air conditioner in either cooling orheating mode, which is determined automatically by the room temper-ature sensor.
When a circuit breaker is used to control the ON/OFF operation,please insert a jumper as described above.
1.17. Self-diagnostic malfunction code display
1.17.1 Indoor unit1) When a malfunction is confirmed, all relays turn off and a flashing
malfunction code number is displayed to indicate the type of mal-function.
When the air conditioner is in non-operating condition, holdingdown AUX button for more than 5 seconds activates the malfunc-tion code display function.
The operation continues only in the case of a serial open-circuit,and the main relay turns off after 30 seconds if the open-circuit con-dition remains.
In the case of a serial short-circuit, the air conditioner continuesoperating without a malfunction code display, and the main relayturns off after 30 seconds if the short-circuit condition remains.
The malfunction information is stored in memory, and can berecalled later and shown on display.
2) The self-diagnostic memory can be recalled and shown on the dis-play by stopping the operation and holding down AUX button formore than 5 seconds.
3) The content of self-diagnosis (malfunction mode) is indicated by aflashing number.
(For details, refer to the troubleshooting section.)
1.17.2 Outdoor unitIf a malfunction occurs, LED1 on the outdoor unit flashes in 0.2-sec-ond intervals as shown below.
Model Peak control currentCooling operation Heating operation
AY-XP9FR-N Approx. 3.8 A Approx. 6.4 A
20 min or more 20 min or more 20 min or more
DefrostingMax. 10 min
DefrostingMax. 10 min
Start ofheatingoperation
Heating operationSet temperature
Activation ofOFF timer
1 hourlater
Max.1.5 hourslater
Max.2 hourslater
Timer settingreached
1 hourlater
Max.1.5 hourslater
Max.2 hourslater
Timer settingreached
Activation ofOFF timer
Set temperature
-1O
C
-1O
C
-1O
C
0.3O
C0.3
O
C0.3
O
CCooling/dehumidifying operation
1 sec 1 sec 0.6 sec
ON
OFF
(Example) Compressor high temperature abnormality
2 – 9
AYXP9FRN
1.18. Information about auto modeIn the AUTO mode, the temperature setting and mode are automati-cally selected according to the room temperature and outdoor temper-ature when the unit is turned on.During operation, if the outdoor temperature changes, the temperaturesettings will automatically slide as shown in the chart.
1.19. Airflow controlThe airflow control holds the two upper and lower louvers at specialpositions during operation to prevent discharged air from directly blow-ing onto people in the room.
1.19.1 Cooling/dehumidifying operationWhen the airflow button is pressed the upper louver is set at anupward angle to send the air along the ceiling.
1.19.2 HeatingWhen the airflow button is pressed the lower louver is set at a down-ward angle to send the air directly toward the floor.
1.20. Difference of operation in Auto and Manual modesIn the Auto mode, the temperature setting is automatically determined based on the outside air temperature. In addition, the air conditioner operationdiffers from the operation in the Manual mode as explained below.
1.20.1 Difference relating to set temperature
1.21. Dehumidifying operation controlIf the room temperature is 26°C or higher when dehumidifying opera-tion starts, the dehumidifying operation provides a low cooling effect inaccordance with the room temperature setting automatically deter-mined based on the outside air operation. (The setting value is thesame as the set temperature for cooling operation in the auto mode.)
If the room temperature is lower than 26°C when dehumidifying opera-tion starts, the dehumidifying operation minimizes the lowering of theroom temperature.
1.22. Self Clean operationHeating or Fan operation and Cluster operation are performed simulta-neously.
The judgment of whether Heating or Fan operation is used is based onthe outside air temperature at 3 minutes after the start of internalcleaning.
The operation stops after 40 minutes. (The air conditioner shows theremaining minutes: 40 → 39 → 38 ... 3 → 2 → 1)
1.23. Plasmacluster Ion functionOperating the Plasmacluster Ion button while the air conditioner is inoperation or in non-operation allows the switching of the operationmode in the following sequence: “Air Clean operation” → “Stop”.
• “Self Clean operation” generates about equal amounts of (+)ionsand (-)ions from the cluster unit to provide clean air.
If the Plasmacluster Ion generation function is operated together withthe air conditioner operation, the indoor unit fan speed and louverdirection are in accordance with the air conditioner settings.
If the Plasmacluster Ion generation function is used without operatingthe air conditioning function, the indoor unit fan operates at a very lowspeed and the upper louver is angled upward and the lower louverremains horizontal. (The airflow volume and direction can be changedby using the remote control.)
1.24. Hot keepWhen the room temperature rises above the set temperature by 0.6°Cor more, the ON/OFF operation of the compressor and indoor unit fanis controlled in order to lower the room temperature.
(The values indicated below, such as "0.6°C" and "1.3°C," varydepending on the outside air temperature.)
1.24.1 Hot keep zone 1With the compressor frequency at the lowest, if the room temperatureis higher than the set temperature by 0.6°C but no more than 1.3°C,the following processes will be activated.
1) The compressor stops temporarily, and restarts after 2 minutes.
2) If the room temperature remains in the hot keep zone, the com-pressor is turned OFF and ON in 3-minute intervals.
3) The indoor unit fan turns OFF and ON with a delay of 30 secondsfrom the compressor OFF/ON.
4) After the above operation in 3-minute intervals is repeated fourtimes, the interval extends to 6 minutes.
1.24.2 Hot keep zone 2If the compressor ON/OFF in hot keep zone 1 fails to bring the roomtemperature within 1.3°C above the set temperature, the following pro-cesses will be activated.
1) The compressor repeats a cycle of 8-minute OFF and 6-minuteON.
2) After the second time, the compressor remains completely OFFand only the indoor unit fan repeats OFF-ON in set intervals.
3) While the compressor is completely OFF in 2), the louvers are sethorizontally to prevent cold air from blowing.
The zone transition and the end of hot keep operation (room tempera-ture lower than the set temperature) are judged when the compressorON period ends.
* This function cannot be repealed.
Modes and Temperature Settings
the figures in ( ) are temperature settings
Auto mode Manual modeCooling Heating Dehumidifying Cooling Heating Dehumidifying
Temperature setting method
Automatic temperature setting based on outside air tem-perature. Can be changed within ±2°C using remote con-trol.
Can be changed between 18 and 32°C using remote control.
Can be changed between 18 and 32°C using remote control.
Automatic setting. Can be changed within ±2°C.
Heating operation Fan operation
24OC Outside air temperature
1.3OC
0.6OC
Set temperature
2 – 10
AYXP9FRN
1.25. Winter coolCooling operation is available during the winter season by the built inwinter cool function.Lower limit of outdoor temperature range is -10°C DB.
When the outside air temperature is low, the outdoor unit fan operatesat slower speed.
NOTE: Built-in protect device may work when outdoor temperaturefalls below 21°C DB., depending on conditions.
1.26. Auto restartWhen power failure occures, after power is recovered, the unit willautomatically restart in the same setting which were active before thepower failure.
1.26.1 Operating mode (Cool, Heat, Dry)• Temperature adjustment (within 2°C range) automatic operation
• Temperature setting
• Fan setting
• Air flow direction
• Power ON/OFF
• Automatic operation mode setting
• Swing louvre
• Plasmacluster mode
1.26.2 Setting not memorized• Timer setting
• Full power setting
• Internal cleaning
1.26.3 Disabling auto restart functionBy removing (cutting) jumper J (JPJ) on the printed circuit board(PCB), the auto restart function can be disabled.
2. Explanation of cluster circuitThe cluster unit generates cluster ions, which are circulated throughout the room by the air flow created by the blower fan (indoor unit fan motor) inthe air conditioner unit.
1) When microcomputer output turns "H," the IC6 output changes to "Lo," turning ON the SSR and applying 230 V to the cluster unit for the genera-tion of cluster ions (positive and negative ions).
3. Outline of PAM circuit
3.1. PAM (Pulse Amplitude Modulation)The PAM circuit varies the compressor drive voltage and controls the rotation speed of the compressor.
The IGBT shown in the block diagram charges the energy (electromotive force) generated by the reactor to the electrolytic capacitor for the inverterby turning ON and OFF.
1
3
12V
SSRC23RE RH
R20
IC6AC230VMicrocomputer output
1
5
3
6
Cluster unitR23R75 R76
PAM drive circuit block diagram
Reactor L5
[PAM drive circuit]
+
Microcomputer (IC1)
AC230V CompressorReactor L6
Noisefilter
AC clockdetection
circuit
DB1
IPM
DB2
Compressorpositiondetector
IGBTdrivecircuit
IGBT
Overvoltagedetection
circuit
2 – 11
AYXP9FRN
When the IGBT is ON, an electric current flows to the IGBT via the reactor (L5), (L6) and diode bridge (DB2).When the IGBT turns OFF, the energy stored while the IGBT was ON is charged to the voltage doubler capacitor via the diode bridge (DB1).
As such, by varying the ON/OFF duty of the IGBT, the output voltage is varied.
3.2. High power factor control circuitThis circuit brings the operating current waveform closer to the waveform of commercial power supply voltage to maintain a high power factor.
Because of the capacitor input, when the PAM circuit is OFF, the phase of the current waveform deviates from the voltage waveform as shown below.
To prevent this deviation, a current is supplied during the periods indicated by "O" in the diagram.
To determine the length of period to supply a current, the zero-cross timing of the AC input voltage is input to the microcomputer via the clock circuit.
The power source frequency is also determined at the same time.
The IGBT turns ON after the time length determined by the zero-cross point to supply a current to the IGBT via the reactor.
This brings the current waveform closer to the voltage waveform in phase.
As described above, the ON/OFF operation of the IGBT controls the increase/decrease of the compressor power supply voltage (DC voltage) toimprove the compressor efficiency and maintain a high power factor by keeping the current phase closer to that of the supply voltage.
3.2.1 Detailed explanation of PAM drive circuit sequence
3.2.2 AC clock (zero-cross) judgment• The clock circuit determines the time from one rising point of the clock waveform to the next rising point.
The detected clock waveform is used to judge the power source frequency (50Hz).
• The zero-cross of the AC voltage is judged as the rising of the clock waveform, as shown in the diagram above.
3.2.3 IGBT ON start time (delay time B)• Based on the zero-cross of the AC voltage, the IGBT turns ON after a delay time set according to the power source frequency.
3.2.4 IGBT ON time (C)• After the above delay time, the IGBT turns ON to supply a current to the reactor.
• The ON time of the IGBT determines the amount of energy (level of DC voltage rise) supplied to the reactor.
DC voltage level in each operation mode (varies depending on external load conditions)
– Cooling operation --- 220 to 240 V
– Heating operation --- 220 to 280 V
Stored energyReactor
L5
L6
DB1
DB2
IGBT
IGBT ON
IGBT OFF
AC voltage waveform
AC voltage and current waveform when PAM is ON
AC current waveform
IGBT ON period
Zero-cross detection
AC voltage waveform
AC current waveform
AC voltage and current waveforms when PAM is OFF
AC voltage waveform
Clock
IGBT ON
A
B C
A
B
C
50Hz
1.2mS
1.2mS
0.25 2.3mS
2 – 12
AYXP9FRN
3.3. PAM protection circuitTo prevent excessive voltage of PAM output fromdamaging the IPM and electrolytic capacitor as wellas the control printed circuit board (PCB), this circuitmonitors the PAM output voltage and turns off thePAM control signal and PAM drive immediatelywhen an abnormal voltage output is generated. Atthe same time, it shuts off the compressor operation.
The PAM output voltage is distributed to pin (4) ofthe comparator (IC8). If this voltage exceeds the ref-erence voltage at pin (5) of the IC8, the output of thecomparator (IC8) reverses (from H to L) and it isinput to pin (38) of the microcomputer (IC1) to haltthe PAM drive.
The protection voltage level is as follows.
3.3.1 Details of troubleshooting procedure for PAM1) PAM shutdown due to error1) When the DC voltage detection circuit sends a signal exceeding the specified voltage to the microcomputer
DC voltage of 350 V or higher (detection circuit input voltage of about 9.2 V or higher) [IC8 pin (4)]
– When an error is detected
• PAM IGBT turns OFF.
• Compressor turns OFF.
• All units shut down completely when the error occurs four times.
2) When the outdoor unit clock waveform differs from the specified value immediately before the PAM IGBT turns ON
When there is no clock waveform input
When a clock signal of other than specified power source frequency (50/60 Hz) is input
– When an error is detected
• PAM IGBT does not turn ON.
• Compressor operates normally.
• Complete shutdown does not occur.
2) PAM error indicationIn case of error “1)”
– An error signal is sent to the indoor unit as soon as an error is generated.
• Malfunction No. 14-0 is indicated when the error code is called out by the indoor unit's self-diagnosis function.
– The LED on the outdoor unit flashes 14 times when an error is generated.
• The LED continues flashing in the 14-time cycle even after the compressor stops operating.
• The LED turns off (data is deleted from the memory) when the outdoor unit power is turned off.
In case of error “2)”
– An error signal is sent to the indoor unit as soon as an error is judged.
• Malfunction No. 14-1 is indicated when the error code is called out by the indoor unit's self-diagnosis function.
– The LED on the outdoor unit flashes 14 times when an error is judged.
• The LED on the outdoor unit flashes in normal pattern when the compressor stops operating.
(Compressor OFF or Thermostat OFF from remote control)
* When a user complains that the air conditioner does not provide sufficient cool air or warm air
In addition to conventional error-generating reasons, there is a possibility that the PAM IGBT does not turn ON even if the compressor is operating.
In that case, the DC voltage does not rise even though the compressor is operating, and lowers to the 180-VDC level.
– Check items
• Clock circuit check
• PAM IGBT check
• Fuse (Fu6) open-circuit check
R2255KC10C9420V
750uF R5300K
R723.7K
R823.7K
0V0V
0V
IC8
15V
R11319.1KF
R11215K
5VR1141M
R1151.8K R116
1K5
42
(Overvoltage detection)
During abnormal voltage output
IC138
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AYXP9FRN
4. Explanation of IPM drive circuitThe IPM for compressor drive is made by Mitsubishi Electric.The power supply for the IPM drive, the shunt resistance for overcurrent detection, etc., are provided outside the IPM (control PCB).
4.1. IPM drive power supply circuitThe power supply for the upper-phase IGBT (HU, HV, HW) drive employs a bootstrap system, and provides power to the upper-phase IC.
The 15-V power supply for the lower-phase IC is provided by the control printed circuit board (PCB).
4.1.1 Brief explanation of bootstrap system (single power drive system)To supply power to the upper-phase IC, the microcomputer (IC1) turns ON the lower-phase IGBT (LU, LV, LW).
This results in a charging current that flows to the electrolytic capacitor of each upper-phase IC input and charges the bootstrap capacitor with a 15-Vcurrent.
The power supply for the subsequent stages is charged while the lower-phase IGBT is ON in ordinary compressor drive control.
P(Vcc)
U,V,W,
VD
VDB
VCIN(n)
N-sideIGBT
N(GND
Bootstrap capacitor
High-voltage-withstanding,high-speed recovery diode
LVIC(LU,LV,LW)
HVIC(HU,HV,HW)
Bootstrap circuit
Initial charge period
Charging current group
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AYXP9FRN
4.1.2 DC overcurrent detection circuitWhen a current of about 25 A or higher flows through the shunt resistance (R49) on the control printed circuit board (PCB), the voltage at this resis-tance is input to IPM CIN pin (26). Then, the gate voltage of the lower-phase IGBT (LU, LV, LW) inside the IPM turns OFF to cut off the overcurrent. Atthe same time, an L output of about 1.8 ms is generated from IPM Fo pin (24), and this results in an L input to overcurrent detection input pin (34) ofthe microcomputer (IC1) and turns OFF the PWM signal output (IC1 pins (51) through (56)) to the IGBT gate.SETRESET
(About 22 A)
SC
SC reference voltage
Delay by CR time constant circuit
About 1.8 ms
a1
Protection circuit status
Output current Ic (A)
Sense voltage relativeto shunt resistance
Error output Fo
(Lower phase)Internal IGBT gate
IPM overcurrentdetection circuit
5V
0V
IC1
R49Overcurrent
Shunt resistance
P
N
CiN
FO
24
26
34
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AYXP9FRN
5. 120° energizing control (digital position detection control)This control system detects the digital position detection signal and adjusts the rate of acceleration/deceleration accordingly.The motor's induced voltage waveform is input to the comparator in the form of PWM-switched pulse waveform, and a position detection signal isgenerated as a reference voltage equaling 1/2 of 280 VDC. However, since there is no induced voltage waveform when the PWM waveform is OFF,the microcomputer performs internal processing so that detection is enabled only when it is ON. Based on the detected position signal, actual PWMwaveform output timing is determined. Since it does not use a filter circuit, the detection accuracy is high.
The microcomputer performs internal processing to cancel spike voltage during the regenerative process.
Furthermore, even if the induced voltage is low, position detection is still possible, thus allowing sensor-less operation at low rotation speed in the ini-tial stage of operation. This reduces the starting current and improves the IPM reliability.
Comparator output waveform(Position signal waveform)
Terminal voltage waveform
Reference voltage(1/2 of DC voltage)
Spike voltage(cancelled)
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AYXP9FRN
AYXP9FRN Service Manual CHAPTER 3. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES[1] PROTECTION DEVICE FUNCTIONS AND OPERATIONS
Function Operation Self-diagnosis result display
Description Detection period Reset condition Indoor unit error
display
Indoor unit
Outdoor unit
1 Indoor unit fan lock Operation stops if there is no input of rotation pulse signal from indoor unit fan motor for 1 minute.
When indoor unit fan is in operation
Operation OFF or ON ✩2 Yes None
Indoor unit fan rota-tion speed error
Operation stops if rotation pulse signal from indoor unit fan indi-cates abnormally low speed (about 300 rpm or slower).
When indoor unit fan is in operation
Operation OFF or ON ✩2 Yes None
2 Indoor unit freeze prevention
Compressor stops if temperature remains below 0°C for 4 minutes.
When in cooling or dehumidifying opera-tion
Automatic reset when heat exchanger tem-perature rises above freeze prevention temperature (2°C or higher)
— None None
3 2-way valve freeze prevention
Compressor stops if temperature of outdoor unit 2-way valve remains below 0°C for 10 continu-ous minutes during cooling or dehumidifying operation.
When in cooling or dehumidifying opera-tion
Automatic reset when temperature of 2-way valve rises above 10°C.
None Yes Yes
4 Indoor unit heat exchanger over-heat shutdown
Operating frequency lowers if indoor unit heat exchanger tem-perature exceeds overheat tem-perature during heating operation.Compressor stops if indoor unit heat exchanger temperature exceeds overheat temperature for 60 seconds at minimum fre-quency.Overheat temperature setting value indoor unit heat exchanger thermistor temperature: about 45 to 54°C
When in heating operation
Automatic reset after safety period (180 sec).
None Yes Yes
5 Outdoor unit heat exchanger over-heat shutdown
Operation frequency lowers if out-door unit heat exchanger temper-ature exceeds about 55°C during cooling operation.Compressor stops if outdoor unit heat exchanger temperature exceeds about 55°C for 120 sec-onds at minimum frequency.
When in cooling or dehumidifying opera-tion
Automatic reset after safety period (180 sec).
None Yes Yes
6 Compressor dis-charge overheat shutdown
Operating frequency lowers if temperature of compressor chamber thermistor (TH1) falls below about 110°C.Compressor stops if temperature of compressor chamber ther-mistor (TH1) remains at about 110°C (for 120 seconds in cooling operation, or 60 seconds in heat-ing operation) at minimum fre-quency.
When compressor is in operation
Automatic reset after safety period (180 sec).
None Yes Yes
7 Dehumidifying oper-ation temporary stop
Compressor stops if outside air temperature thermistor is lower than about 16°C during dehumidi-fying operation.
When in dehumidify-ing operation
Automatic reset when outside air tempera-ture rises above 16°C.
None Yes Yes
8 DC overcurrent error
Compressor stops if electric cur-rent of about 25 A or higher flows in IPM.
When compressor is in operation
Operation OFF or ON Yes ✩1 Yes Yes
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AYXP9FRN
9 AC overcurrent error
Operating frequency lowers if compressor AC current exceeds peak control current value. Com-pressor stops if compressor AC current exceeds peak control cur-rent value at minimum frequency.
When compressor is in operation
Operation OFF or ON Yes ✩1 Yes Yes
10 AC overcurrent error in compressor OFF status
Indoor and outdoor units stop if AC current exceeds about 3 A while compressor is in non-opera-tion status.
When compressor is in non-operation
Replacement of defective parts such as IPM
Yes ✩2 Yes Yes
11 AC maximum cur-rent error
Compressor stops if compressor AC current exceeds 17 A.
When compressor is in operation
Operation OFF or ON Yes ✩1 Yes Yes
12 AC current defi-ciency error
Compressor stops if operating frequency is 50 Hz or higher and compressor AC current is about 2.0 A or lower.
When compressor is in operation
Operation OFF or ON Yes ✩1 Yes Yes
13 Thermistor installa-tion error or 4-way valve error
Compressor stops if high and low values of temperatures detected by outdoor unit heat exchanger thermistor (TH2) and 2-way valve thermistor (TH5) do not match operating cycle.
3 minutes after com-pressor startup
Operation OFF or ON Yes ✩1 Yes Yes
14 Compressor high temperature error
Compressor stops if compressor chamber thermistor (TH1) exceeds about 114°C, or if there is short-circuit in TH1.
When in operation Operation OFF or ON Yes ✩1 Yes Yes
15 Outdoor unit heat exchanger ther-mistor short-circuit error
Compressor stops if there is short-circuit in outdoor unit heat exchanger thermistor (TH2).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
16 Outdoor unit outside air temperature thermistor short-cir-cuit error
Compressor stops if there is short-circuit in outdoor unit out-side air temperature thermistor (TH3).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
17 Outdoor unit suction thermistor short-cir-cuit error
Compressor stops if there is short-circuit in outdoor unit suc-tion thermistor (TH4).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
18 Outdoor unit 2-way valve thermistor short-circuit error
Compressor stops if there is short-circuit in outdoor unit 2-way valve thermistor (TH5).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
19 Outdoor unit heat exchanger ther-mistor open-circuit error
Compressor stops if there is open-circuit in outdoor unit heat exchanger thermistor (TH2).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
20 Outdoor unit outside air temperature thermistor open-cir-cuit error
Compressor stops if there is open-circuit in outdoor unit out-side air temperature thermistor (TH3).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
21 Outdoor unit suction thermistor open-cir-cuit error
Compressor stops if there is open-circuit in outdoor unit suc-tion thermistor (TH4).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
22 Outdoor unit 2-way valve thermistor open-circuit error
Compressor stops if there is open-circuit in outdoor unit 2-way valve thermistor (TH5).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
23 Outdoor unit dis-charge thermistor open-circuit error
Compressor stops if there is open-circuit in outdoor unit dis-charge thermistor (TH1).
At compressor star-tup
Operation OFF or ON Yes ✩1 Yes Yes
24 Serial signal error Power relay turns OFF if indoor unit cannot receive serial signal from outdoor unit for 8 minutes.
When in operation Operation OFF or ON(Automatic reset when less than 8 min-utes)
Yes None
Compressor stops if outdoor unit cannot receive serial signal from indoor unit for 30 seconds.
When in operation Reset after reception of serial signal
None None None
Function Operation Self-diagnosis result display
Description Detection period Reset condition Indoor unit error
display
Indoor unit
Outdoor unit
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✩1—The outdoor unit restarts four times before the indoor unit error is displayed (complete shutdown).
✩2—A single error judgment results in the display of the indoor unit error (complete shutdown).
✩3—The outdoor unit restarts eight times before the indoor unit error is displayed (complete shutdown).
[2] AIR CONDITIONER OPERATION IN THERMISTOR ERROR
1. Indoor unit
25 Compressor star-tup error
Compressor stops if compressor fails to start up.
At compressor star-tup
Operation OFF or ON Yes ✩3 Yes Yes
26 Compressor rota-tion error (at 120° energizing)
Compressor stops if there is no input of position detection signal from compressor or input is abnormal.
Compressor operat-ing at 120° energizing
Operation OFF or ON Yes ✩3 Yes Yes
27 Outdoor unit DC fan error
Operation stops if there is no input of rotation pulse signal from outdoor unit fan motor for 30 sec-onds.
When outdoor unit fan is in operation
Operation OFF or ON Yes ✩1 Yes Yes
28 PAM overvoltage error
Compressor stops if DC voltage is 350 V or higher.
When in operation Operation OFF or ON Yes ✩1 Yes Yes
29 PAM clock error When power source frequency cannot be determined (at startup), or when power source clock can-not be detected for 1 continuous second (at startup).
At compressor star-tup, when in opera-tion
Compressor contin-ues operation with-out stopping.
None Yes Yes
Item Mode Control opera-tion
When resis-tance is low (temperature judged higher than actual)
Short-circuit When resis-tance is high (temperature judged lower than actual)
Open-circuit
Room tempera-ture thermistor (TH1)
Auto Operation mode judgment
Cooling mode is activated even if room tempera-ture is low.
Cooling mode is activated in most cases.
Heating mode is activated even if room tempera-ture is high.
Heating mode is always activated.
Cooling Frequency control Room becomes too cold.
Air conditioner operates in full power even when set temperature is reached.
Room does not become cool.
Compressor does not operate.
Dehumidifying Room tempera-ture memoryFrequency control
Normal operation. Room tempera-ture is stored in memory as 31.0°C, and com-pressor does not stop.
Normal operation. Room tempera-ture is stored in memory as 18.5°C, and com-pressor does not operate.
Heating Frequency control Room does not become warm.
Hot keep status results immedi-ately after opera-tion starts.Frequency does not increase above 30 Hz (40 Hz).
Room becomes too warm.
Air conditioner operates in full power even when set temperature is reached.
Heat exchanger thermistor (TH2)
CoolingDehumidifying
Freeze preven-tion
Indoor unit evap-orator may freeze.
Indoor unit evap-orator may freeze.
Compressor stops occasion-ally.
Compressor does not operate.
Heating Cold air preven-tion
Cold air preven-tion deactivates too soon and cold air discharges.
Compressor operates at low speed or stops, and frequency does not increase.
Cold air preven-tion deactivates too slow.
Cold air preven-tion does not deactivate, and indoor unit fan does not rotate.
Function Operation Self-diagnosis result display
Description Detection period Reset condition Indoor unit error
display
Indoor unit
Outdoor unit
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AYXP9FRN
2. Outdoor unitItem Mode Control opera-tion
When resis-tance is low (temperature judged higher than actual)
Short-circuit When resis-tance is high (temperature judged lower than actual)
Open-circuit
Compressor chamber ther-mistor (TH1)
CoolingDehumidifyingHeating
Expansion valve control and com-pressor protection
Compressor operates, but room does not become cool or warm (expansion valve is open).
Compressor high temperature error indication.
Layer short-cir-cuit or open-cir-cuit may result in compressor in normal operation.
Outdoor unit ther-mistor open-cir-cuit error indication.
Heat exchanger thermistor (TH2)
CoolingDehumidifying
Outdoor unit heat exchanger over-heat prevention
Compressor operates at low speed or stops.
Outdoor unit ther-mistor short-cir-cuit error indication.
Normal operation. Outdoor unit ther-mistor open-cir-cuit error indication.
Heating Expansion valve controlDefrosting
Defrosting opera-tion is not acti-vated as needed, and frost accumu-lates on outdoor unit (expansion valve is closed).
Outdoor unit ther-mistor short-cir-cuit error indication.
Defrosting opera-tion is activated unnecessarily, and room does not become warm (expansion valve is open).
Outdoor unit ther-mistor open-cir-cuit error indication.
Outside air tem-perature ther-mistor (TH3)
Auto Operation mode judgment
Cooling mode is activated even if room tempera-ture is low.
Outdoor unit ther-mistor short-cir-cuit error indication.
Heating mode is activated even if room tempera-ture is high.
Outdoor unit ther-mistor open-cir-cuit error indication.
CoolingDehumidifying
Operation not affected
Normal operation. Outdoor unit ther-mistor short-cir-cuit error indication.
Normal operation. Outdoor unit ther-mistor open-cir-cuit error indication.
Heating Rating controlDefrosting
Defrosting opera-tion is activated unnecessarily.
Outdoor unit ther-mistor short-cir-cuit error indication.
Defrosting opera-tion is not acti-vated, and frost accumulates on outdoor unit.
Outdoor unit ther-mistor open-cir-cuit error indication.
Suction pipe ther-mistor (TH4)
CoolingDehumidifying
Expansion valve control
Compressor operates, but room does not become cool (expansion valve is open).
Outdoor unit ther-mistor short-cir-cuit error indication.
Frost accumu-lates on evapora-tor inlet section, and room does not become cool (expansion valve is closed).
Outdoor unit ther-mistor open-cir-cuit error indication.
Heating Expansion valve control
Compressor operates, but room does not become warm (expansion valve is open).
Outdoor unit ther-mistor short-cir-cuit error indication.
Frost accumu-lates on expan-sion valve outlet section, and room does not become warm (expansion valve is closed).
Outdoor unit ther-mistor open-cir-cuit error indication.
2-way valve ther-mistor (TH5)
CoolingDehumidifying
Expansion valve control
Frost accumu-lates on indoor unit evaporator and room does not become cool (expansion valve is closed).
Outdoor unit ther-mistor short-cir-cuit error indication.
Compressor operates, but room does not become cool (expansion valve is open).
Outdoor unit ther-mistor open-cir-cuit error indication.
Heating Operation not affected
Normal operation. Outdoor unit ther-mistor short-cir-cuit error indication.
Normal operation. Outdoor unit ther-mistor open-cir-cuit error indication.
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AYXP9FRN
[3] THERMISTOR TEMPERATURE CHARACTERISTICS1. Indoor unit thermistor temperature characteristics
2. Outdoor unit thermistor temperature characteristics
K
100
80
60
40
20
0-10 0 10 20 30 40
Heat exchanger thermistor TH2 (orange)Resistance at 25 : 15 k
Resistance at 25 : 10 kRoom temperature thermistor TH1 (yellow)
- +
TesterTester
4 3 2 1
- +
Temperature( )
Resistance(K )
CN4
TH1 TH2
CN4
Thermistor
Room temperature
Heat exchanger
Color
Yellow
Orange
Symbol
TH1(CN4)
TH2(CN4)
TH1 Room temperature thermistorTH2 Heat exchanger thermistor
Before measuring resistance,disconnect connectors asshown above.
+ -
TH2 TH5
500K
400K
300K
200K
100K
0-20 0 20 60 80 100 120
Tester
1 10
ConnectorCN8
Resistance at 2552.76 k
5.8K
40K
30K
20K
0
10K
-20 0 20 6040
3.06K
4.17K
1.72K
2.28K
+ -
Tester
(In case of TH2 heat exchanger thermistor)
1 10
ConnectorCN8
Thermistor
Compressor thermistor
Heat exchanger thermistor
Outdoor air temperature thermistor
Suction thermistor
2-way valve thermistor
No.
TH1
TH2
TH3
TH4
TH5
Connector
No. (1) - No. (2)
No. (3) - No. (4)
No. (5) - No. (6)
No. (7) - No. (8)
No. (9) - No. (10)
Color
Red
Orange
Green
Black
Yellow
TH1 Compressor thermistor TH2 Heat exchanger thermistorTH3 Outdoor air temperature thermistorTH4 Suction thermistorTH5 2-way valve thermistor
Resistance(K ) Resistance
(K )
Temperature( ) Temperature( )
Resistance at 014.57 k
Resistance at 254.431 k
Before measuring resistance,
disconnect connectors from PWB.
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AYXP9FRN
[4] HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY1. Cooling in 40 Hz fixed modeTo operate the outdoor unit independently, short-circuit the sections indicated by arrows in the diagram below with an adapter, and apply 230 VACbetween (1) and (N) on the terminal board of the outdoor unit. This allows the outdoor unit to be operated in cooling mode independently.
(Do not operate the outdoor unit in this condition for an extended period of time.)
[5] GENERAL TROUBLESHOOTING CHART
1. Indoor unit does not turn on
2. Indoor unit fan does not operate
3. Indoor unit fan speed does not change
4. Remote control signal is not received
Main cause Inspection method Normal value/condition RemedyCracked PWB.(Cracked pattern)
Check visually. There should be no cracking in PWB or pattern.
Replace PWB.
Open-circuit in FU1 (250 V, 3 A), FU2 (250 V, 3 A)
Check melting of FU1, FU2. There should be no open-circuit. Replace PWB.
Main cause Inspection method Normal value/condition RemedyOpen-circuit in heat exchanger thermistor (TH2) (in heating oper-ation)
Measure thermistor resistance (dismount for check).
– 1 Replace thermistor.There should be no open-circuit or faulty contact.
Replace thermistor.
Disconnected heat exchanger thermistor (TH2) (in heating oper-ation)
Inspect connector on PWB.Check thermistor installation con-dition.
Thermistor should not be discon-nected.
Install correctly.
Main cause Inspection method Normal value/condition RemedyRemote control not designed to allow fan speed change.
Check operation mode. Fan speed should change except during dehumidifying operation, ventilation, light dehumidifying operation, internally normal oper-ation
Explain to user.
Main cause Inspection method Normal value/condition RemedyBatteries at end of service life. Measure battery voltage. 2.5 V or higher (two batteries in
series connection)Install new batteries.
Batteries installed incorrectly. Check battery direction. As indicated on battery compart-ment.
Install batteries in indicated direc-tion.
Lighting fixture is too close, or flu-orescent lamp is burning out.
Turn off light and check. Signal should be received when light is turned off.
Change light position or install new fluorescent lamp.
Use Sevick light (Hitachi). Check if Sevick light (Hitachi) is used.
Signal may not be received sometimes due to effect of Sevick light.
Replace light or change position.
Operating position/angle is inap-propriate.
Operate within range specified in manual.
Signal should be received within range specified in manual.
Explain appropriate handling to user.
Open-circuit or short-circuit in wir-ing of light receiving section.
Check if wires of light receiving section are caught.
Wires of light receiving section should not have any damage caused by pinching.
Replace wires of light receiving section.
Defective light receiving unit. Check signal receiving circuit (measure voltage between termi-nals 2 and 3 of connector BCN3B).
Tester indicator should move when signal is received.
Replace PWB.
(L2)C9C10
Connect with IC clipTest mode cooling at 40 HzConnect with IC clipTest mode cooling at 40 Hz
Short-circuit negative terminal ofcapacitor (C33) and jumper wire(JP16) using IC clip, etc.
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AYXP9FRN
5. Louvers do not move
6. There is noise in TV/radio
7. Malfunction occurs
8. Compressor does not start
9. Operation stops after a few minutes and restarts, and this process repeats
CAUTION: If fuse FU1/FU4/FU5 (outdoor unit control circuit board) is blown, be careful of charging voltage in inverter electrolytic capacitor C9, C10.
To discharge stored electricity, unplug the power cord and connect the plug of a soldering iron (100VAC, 50W) between the positive andnegative terminals of inverter electrolytic capacitor C9, C10.
Dew condensation on light receiv-ing unit.
Check for water and rust. Signal should be received within range specified in manual.
Take moisture-proof measure for lead wire outlet of light receiving section.
Main cause Inspection method Normal value/condition RemedyCaught in sliding section. Operate to see if louvers are
caught in place.Louvers should operate smoothly. Remove or correct catching sec-
tion.Disconnected connector (DCNC, DCND on relay PWB, louver motor side)
Inspect connectors. Connectors or pins should not be disconnected.
Install correctly.
Contact of solder on PWB(connector section on PWB)
Check visually. There should not be solder con-tact.
Correct contacting section.
Main cause Inspection method Normal value/condition RemedyGrounding wires not connected properly.
Check grounding wire connec-tions.
Grounding wires should be con-nected properly.
Connect grounding wires prop-erly.
TV/radio is placed too close to outdoor unit.
Check distance between TV/radio and outdoor unit.
If TV/radio is placed too close, it may become affected by noise.
Move TV/radio away from outdoor unit.
Other than above. Check for radio wave interfer-ence. (See page )
Main cause Inspection method Normal value/condition RemedyMalfunction caused by noise. Check for radio wave interfer-
ence. (See page )
Main cause Inspection method Normal value/condition RemedyErroneous inter-unit connection. Check wiring between indoor and
outdoor units.Terminal board 1-N: 230 VAC, 50 HzTerminal board 2: serial signal
Correct wiring.
Damaged IPM. Check IPM continuity. See [IPM check method] on page 8-3.
Replace IPM.
Dried-up electrolytic capacitor. Check electrolytic capacitor. See [Inverter electrolytic capaci-tor (C9, C10) check method] on page 8-2.
Replace electrolytic capacitor.
Blown outdoor unit fuse. Check 20-A fuse.Check 15-A fuse.
Fuse should not be blown. Replace fuse/diode bridge.Replace fuse.Replace outdoor unit PWB assembly.
Power supply voltage is too low. Measure power supply voltage during startup.
230±10 VAC, 50 Hz Make sure that power supply volt-age is 180 V or higher.
Compressor lock. Supply current and touch com-pressor cover (sound absorbing material) to check if operation starts.
Compressor should start nor-mally.
Apply external impact to com-pressor.Replace compressor.
Main cause Inspection method Normal value/condition RemedyDried-up electrolytic capacitor. Measure 320-VDC line voltage. 250 V or higher. Replace electrolytic capacitor.Layer short-circuit in expansion valve coil.
Measure resistance. 46±3Ω in each phase (at 20°C) Replace coil.
Main cause Inspection method Normal value/condition Remedy
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AYXP9FRN
[6] MALFUNCTION (PARTS) CHECK METHOD1. Procedure for determining defective outdoor unit IPM/compressor The following flow chart shows a procedure for locating the cause of a malfunction when the compressor does not start up and a DC overcurrent indi-cation error occurs.
YES
Immediatelyafter startup
YES
YES
NO
NO
NO
YES
NO
Connect power cordto AC outlet.
Normal
NO
Replace outdoor unit PWB.
Using remote control,operate air conditionerso that compressorstarts.
Is there 230 VACbetween (1) and (N)on outdoor unit PCB?
Is LED1 on outdoorunit flashing?
Compressor starts up.
Does LED1 indicateDC overcurrent error?
Does LED1 indicaterotation error?
Outdoor unit PWB.15/5 V display section.Voltage OK.
Replace compressor.
Check inter-unit wiring.Check indoor unit PWB.
Does LED1 remain lit?
Serial signal error.Check inter-unit wiring.Check indoor andoutdoor unit PWBs.
Replace outdoor unitPWB.Check compressor.2/3-way valve closed.Refrigerant shortage.
Replace outdoor unit
Is there 320 VDC betweenpins IPM (31) and (35)?
+13 V, +15 V on PWB.
+13 V on PWB.
Replace outdoor unit PWB.
Replace expansion valve.
End.
Check posistor (PTC1)(about 40 at 25 ).Check IPM.Check fan motor.Check outdoor unit PCB.Check wiring.Check PAM IGBT (Q5).
Disconnect expansionvalve connector.
Replace outdoor unit PWB.
After about20 seconds
YES
NO
NO
YES
NO
NO
YES
YES YES
No(unlit)
OK
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AYXP9FRN
2. Procedure for determining defective expansion valve3. Diode bridge check methodTurn off the power and let the inverter electrolytic capacitor (C9, C10) discharge completely. Then use a tester and check continuity.
When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed.
4. Inverter electrolytic capacitor (C9, C10) check methodTurn off the power, let the inverter electrolytic capacitor (C9, C10) discharge completely, and remove the capacitor from the control printed circuitboard (PWB). First, check the case for cracks, deformation and other damages. Then, using a needle-type tester, check continuity.
Determination of normal conditionThe tester needle should move on the scale and slowly returns to the original position. The tester needle should move in the same way when polarities are reversed. (When measurement is taken with the polarities reversed, the tester needle exceeds the scale range. Therefore, let the capacitor discharge before measurement.)
Measure resistance in expansion valve coil.
Normal resistance between redterminal of expansion valve
lead wire and each terminal:about 46 (at 20 )
Insert checker shown at left intoconnector (CN12) on control PWB, andoperate air conditioner.
If frost accumulates on 2-way valve after 10 to 20minutes of cooling operation, then thermistors with
yellow and black lead wires may be defective. Checkthese thermistors.
Replace control PWB.
NO
NO
YES
YES
Checker
LED(red)
ConnectorJ.S.T. XAP-06V-1
TerminalSXA-001T-P0.6
4 3 2 156
5.6K 5.6K 5.6K 5.6K
Do LEDs on checker light in orderlysequence(lighting of 1 LED => lighting of 2 LEDs)
45 B
Needle-type tester Normal resistance value
(several M )
Value in ( ) is for digital tester.
3 – 9
AYXP9FRN
5. IPM check methodTurn off the power, let the large capacity electrolytic capacitor (C10) discharge completely, and dismount the IPM. Then, using a tester, check leakcurrent between C and E.When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed.
Values in ( ) are for digital tester.
5.1. IPM internal circuit diagram
[7] OUTDOOR UNIT CHECK METHODAfter repairing the outdoor unit, conduct the following inspection procedures to make sure that it has been repaired completely. Then, operate thecompressor for a final operation check.
1. Checking procedures
Needle-type tester Normal resistance value(-) (+)
P N ∞(several MΩ)U
VW
Needle-type tester Normal resistance value(-) (+)
U N ∞(several MΩ)V
W
No.
Item Check method Normal value/condition Remedy
1 Preparation Disconnect compressor cords (white, orange, red: 3 wires) from compres-sor terminals, and connect simulated load (lamp used as load).Operate air conditioner in cooling or heating test operation mode.
2 Inverter DC power supply voltage check
Measure DC voltage between IPM pins (31) and (35).
320 VDC Replace control PWB.Replace diode bridge.Correct soldered section of Fas-ten tabs (T1, T2, T5 - T3) on con-trol PWB and IMP (S, C, R). (Repair solder cracks.)
3 IPM circuit check Check that 3 lamps (load) light.Check position detection voltage (+15 V, 5 V) on control PWB.
Each voltage should be normal.All 3 lamps (load) should light with same intensity.
Replace control PWB.
3 – 10
AYXP9FRN
2. Troubleshooting of outdoor unit electric components
4 Compressor check Measure compressor coil resistance (for each phase of U, V and W).Use multi-meter or digital tester capa-ble of displaying two digits right of the decimal point (0.01Ω).
Resistance value at 20°C --- 0.65Ω Correct connections at compres-sor terminals.Replace compressor.
5 Expansion valve check Measure expansion valve coil resis-tance.
Each phase 46±3Ω (at 20°C) Replace expansion valve.
6 Final check Turn off power, and connect compres-sor cords to compressor.Operate air conditioner.Measure DC voltage between IPM pins (31) and (35).
Compressor should operate nor-mally.200 VDC or higher.
Replace control PWB.Replace outdoor unit thermistor.Replace compressor (in case of compressor lock).
No.
Item Check method Normal value/condition Remedy
Does LED light?NO
YES
YES NO
Does LED flash?
Normal
NO
YES
NOYES
NO
YES
NO
YES
Is 230 V appliedbetween 1 andN on outdoorunit terminalboard?
Is voltage betweenIPM pins (31) and(35) 320 V orhigher?
5/ Short-circuit in DC fan motorShort-circuit in IPMShort-circuit in diode bridgeBlown fuseDefective electrolytic capacitorWire disconnection, PWB pattern damageShort-circuit in PAM IGBT (Q5)
Defective switching power supply circuitMalfunction of 3-terminal regulator IC4, IC1Short-circuit in expansion valve coilMalfunction of transistor array IC7Solder contact or other problems
Malfunction of 3-terminal regulator IC4, IC1
Microcomputer oscillator errorMalfunction of microcomputer reset ICMalfunction of microcomputer
Malfunction of serial signal circuitCheck wiring between indoor and outdoor units.
Is switching powersupply output of13 VDC, 15 VDCproduced?
Is 5 VDC outputproduced?
Check indoorunit.
3 – 11
AYXP9FRN
3. Caution in checking printed circuit boards (PWB)3.1. Non-insulated control circuitThe GND terminals of the low-voltage circuits (control circuits for microcomputer and thermistors and drive circuits for expansion valve and relays) onthe control printed circuit board (PWB) are connected to the compressor drive power supply (320-VDC negative terminal). Therefore, exercise utmostcaution to prevent electric shock.
If a measuring instrument used for the test is grounded, its chassis (ground) has the same electric potential as the 0-V probe. Since non-insulated cir-cuits have the following voltage potential difference from the ground, connection of the grounding wire results in a short-circuit between the 0-V lineand the ground, thus allowing an excessive current to flow to the tester to cause damage.
If the sheaths of the thermistor lead wires or expansion valve lead wires inside the outdoor unit become damaged due to pinching by the front panelor other metal parts or contacting a pipe, a high voltage can flow and destroy the circuits. To prevent these problems, carefully conduct assemblywork.
Ground voltage
320-VDC line
0-V line
0-V line voltage (point (F))
Voltage at point (E)
320V
+ 160V
- 160V
Terminal board
Ground0-V line Point (F)
Point (E)Reactor
IPM+-
Compressor motor
2
AC230V
1
3
Outdoor unit circuits
M
ReasonThe oscilloscope (chassis ground) has the same electric potential as the 0-V probe. Theentire electronic control section of the outdoor unit has a voltage potential difference fromthe ground as shown in the above diagram. When the oscilloscope is set up, the 0-V lineand the ground voltage (ground) will be short-circuited, resulting in an excessive currentflow to cause damage to the oscilloscope or indoor electric circuits.
Do not touch thecabinet or bring metalparts into contact withthe cabinet. Danger!!
Do not connectthe groundingwire.
3 – 12
AYXP9FRN
[8] TROUBLESHOOTING GUIDE1. Self-Diagnosis Function and Display ModeTo call out the content of the self-diagnosis memory, hold down the emergency operation button for more than 5 seconds when the indoor unit is notoperating.
• The number of indications displayed by the LEDs on the outdoor unit differs from that for the 2001 cooling unit models (for detailed display of mal-function information).
The display of malfunction No. differs from that of the 2001 cooling unit models. To show detailed malfunction information, two types of numbersflash alternately. (example: "21" ←→ "-0")
1) The content of the self-diagnosis memory can be called out and displayed on the seven-segment display section on the indoor unit. (The errordata cannot be called out for display by the LED on the outdoor unit.)
2) If the power cord is unplugged from the AC outlet or the circuit breaker is turned off, the self-diagnosis memory loses the stored data.
a) The self-diagnosis display function of the indoor unit indicates the content of diagnosis by showing the error main category (number) and theerror sub-category (-number) alternately in 1-second intervals on the seven-segment display section of the indoor unit.
Example of self-diagnosis display on indoor unit: Compressor high-temperature error
b) The self-diagnosis display function of the outdoor unit indicates the error information by flashing LED1 on the outdoor unit according to the con-tent of self-diagnosis.
The self-diagnosis display function of the outdoor unit is active only for about 3 to 10 minutes after self-diagnosis is performed during operation,and the display returns to normal condition after this display period.
The content of self-diagnosis cannot be called out by the self-diagnosis display function of the outdoor unit.
Example of self-diagnosis display on outdoor unit: Compressor high-temperature error
c) The content of diagnosis is transferred to the indoor unit via serial communication, but it does not trigger a complete shutdown operation.
: Flashes in 2-sec intervals (normal), : On, : Off, : Flashes 3 times in 0.2-sec intervals (When LED1 on the outdoor unit flashes in 2-secintervals, the outdoor unit is in normal condition.)
Status of indoor/outdoor
units
Indication by LED1 on out-
door unit *2
Malfunction No. dis-
played on main unit
display sec-tion *1
Content of diagnosis Inspection location/method Remedy
Main cate-gory
Sub-cate-gory
Main category Sub-category
Indoor/outdoor units in operation
Nor-mal
flash-ing
0 0 Normal – –
Indoor/outdoor units in complete shutdown
1 time 1 -0 Outdoor unit thermistor short-circuit
Heat exchanger thermistor short-cir-cuit error
(1) Measure resistance of the outdoor unit thermistors.(TH2 to TH5: Approx. 4.4 kΩ at 25°C)
(1) Replace the outdoor unit thermistor assem-bly.
-1 Outside tempera-ture thermistor short-circuit error
(2) Check the lead wire of the outdoor unit thermistor for torn sheath and short-cir-cuit.
(2) Replace the outdoor unit thermistor assem-bly.
-2 Suction thermistor short-circuit error
(3) No abnormality found in above inspections (1) and (2).
(3) Replace the outdoor unit control PWB assembly.-3 2-way valve ther-
mistor short-circuit error
1 sec 1 sec 1 sec 1 sec 1 sec1 sec0.6 sec 0.6 sec0.6 sec 0.6 sec 1 secONOFF
1 sec 1 sec
3 – 13
AYXP9FRN
Indoor/outdoor units in complete shutdown
2 times 2 -0 Cycle tempera-ture
Compressor high-temperature error
(1) Check the outdoor unit air outlet for blockage.
(1) Ensure unobstructed air flow from the out-door unit air outlet.
(2) Check if the power supply voltage is 90 V or higher at full power.
(2) Connect power sup-ply of proper voltage.
(3) Check the pipe connec-tions for refrigerant leaks.
(3) Charge the specified amount of refrigerant.
(4) Measure resistance of the outdoor unit compressor thermistor.(TH1: Approx. 53 kΩ at 25°C)
(4) Replace the outdoor unit compressor ther-mistor assembly.
(5) Check the expansion valve for proper operation.
(5) Replace the expan-sion valve coil, expan-sion valve or outdoor unit control PWB assembly.
Indoor unit in operationOutdoor unit in tempo-rary stop
-1 Temporary stop due to compressor dis-charge overheat *3
(Temporary stop for cycle pro-tection)
–
-2 Temporary stop due to outdoor unit heat exchanger overheat *3
(Temporary stop for cycle pro-tection)
–
-3 Temporary stop due to outdoor unit heat exchanger overheat *3
(Temporary stop for cycle pro-tection)
–
-4 Temporary stop due to 2-way valve freeze *3
(Temporary stop for cycle pro-tection)
–
Indoor unit in operationOutdoor unit in tempo-rary stop
3 times 3 -0 Dry operation Temporary stop due to dehumidifying operation *3
(Temporary stop for cycle pro-tection)
–
Indoor/outdoor units in complete shutdown
5 times 5 -0 Outdoor unit thermistor open-circuit
Heat exchanger thermistor open-cir-cuit error
(1) Check connector CN8 of the outdoor unit ther-mistor for secure installa-tion.
(1) Correct the installa-tion.
-1 Outside tempera-ture thermistor open-circuit error
(2) Measure resistance of out-door thermistors TH1 to TH5.
(2) Replace the outdoor unit thermistor assem-bly.
-2 Suction thermistor open-circuit error
(3) Check the lead wires of thermistors TH1 through TH5 on the outdoor unit control PWB for open-cir-cuit.
(3) Replace the outdoor unit thermistor assem-bly.
-3 2-way valve ther-mistor open-circuit error
(4) No abnormality found in above inspections (1) through (3).
(5) Replace the outdoor unit control PWB assembly.
-4 Discharge ther-mistor open-circuit error
Status of indoor/outdoor
units
Indication by LED1 on out-
door unit *2
Malfunction No. dis-
played on main unit
display sec-tion *1
Content of diagnosis Inspection location/method Remedy
Main cate-gory
Sub-cate-gory
Main category Sub-category
3 – 14
AYXP9FRN
Indoor/outdoor units in complete shutdown
6 times 6 -0 Outdoor unit DC DC overcurrent error (1) IPM continuity check (1) Replace the outdoor unit control PWB assembly.
(2) Check the IPM and heat sink for secure installation.
(2) Correct the installa-tion (tighten the screws).
(3) Check the outdoor unit fan motor for proper rotation.
(3) Replace the outdoor unit fan motor.
(4) No abnormality found in above inspections (1) through (3).
(4) Replace the outdoor unit control PWB assembly.
(5) No abnormality found in above inspections (1) through (4).
(5) Replace the compres-sor.
-1 IPM pin level error Check the IPM is attached correctly to the outdoor unit control PWB.
Replace the outdoor unit control PWB assembly.
Indoor/outdoor units in complete shutdown
7 times 7 -0 Outdoor unit AC AC overcurrent error (1) Check the outdoor unit air outlet for blockage.
(1) Ensure unobstructed air flow from the out-door unit air outlet.
(2) Check the outdoor unit fan for proper rotation.
(2) Check the outdoor unit fan motor.
-1 AC overcurrent error in OFF status
(1) IPM continuity check (1) Replace the outdoor unit control PWB assembly.
-2 AC maximum cur-rent error
(1) Check the outdoor unit air outlet for blockage.
(1) Ensure unobstructed air flow from the out-door unit air outlet.
(2) Check the outdoor unit fan for proper rotation.
(1) Check the outdoor unit fan motor.
-3 AC current defi-ciency error
(1) Check if there is an open-circuit in the secondary winding of the current transformer of the outdoor unit control PWB.
(1) Replace the outdoor unit control PWB assembly.
(2) Check if the refrigerant volume is abnormally low.
(2) Charge the specified amount of refrigerant.
(3) Check if the refrigerant flows properly.
(3) Correct refrigerant clogs.(2-way valve, 3-way valve, pipe, expan-sion valve)
Indoor/outdoor units in complete shutdown
9 times 9 -0 Outdoor unit cooling/heating switchover
Thermistor installa-tion error or 4-way valve error
(1) Check to make sure out-door unit thermistor TH2 (heat exchanger) and TH5 (2-way valve) are installed in correct positions.
(1) Correct the installa-tion.
(2) Measure resistance of thermistors TH1 and TH5.
(2) Replace the ther-mistor assembly.
(3) Check the 4-way valve for proper operation.
(3) Replace the 4-way valve.
(4) No abnormality found in above inspections (1) through (3).
(4) Replace the outdoor unit control PWB assembly.
-3 Torque control error (1) Check if the refrigerant volume is abnormally low.
(1) Change the specified amount of refrigerant.
(2) Check the 4-way valve for proper operation.
(2) Replace the 4-way valve.
(3) check to see compressor type is correct.
(3) Replace the compres-sor with the correct part.
Status of indoor/outdoor
units
Indication by LED1 on out-
door unit *2
Malfunction No. dis-
played on main unit
display sec-tion *1
Content of diagnosis Inspection location/method Remedy
Main cate-gory
Sub-cate-gory
Main category Sub-category
3 – 15
AYXP9FRN
Indoor/outdoor units in complete shutdown
11times
11 -0 Outdoor unit DC fan
Outdoor unit DC fan rotation error
(1) Check connector CN3 of the outdoor unit DC fan motor for secure installa-tion.
(1) Correct the installa-tion.
(2) Check the outdoor unit fan motor for proper rotation.
(2) Replace the outdoor unit fan motor.
(3) Check fuse FU3. (3) Replace the outdoor unit control PWB assembly.
(4) Outdoor unit control PWB (4) Replace the outdoor unit control PWB assembly.
Indoor/outdoor units in complete shutdown
13times
13 -0 DC compressor Compressor startup error
(1) Check the colors (red, white, orange) of the com-pressor cords for proper connection. (PWB side, compressor side)
(1) Correct the installa-tion.(U: Red, V: White, W: Orange)
-1 Compressor rota-tion error(120° energizing error)
(2) Check if the IPM terminal resistance values are uni-form.
(2) Replace the outdoor unit control PWB assembly.
(3) No abnormality found in above inspections (1) and (2).
(3) Replace the outdoor unit control PWB assembly.
(4) No abnormality found in above inspections (1) through (3).
(4) Replace the compres-sor.
Indoor/outdoor units in complete shutdown
14times
14 -0 Outdoor unit PAM
PAM over voltage errorCompressor rota-tion error
(1) Check the AC power sup-ply voltage for fluctuation.
(1) Connect stable power supply.
(2) No abnormality found in above inspection (1).
(2) Replace the outdoor unit control PWB assembly.
Indoor/outdoor units in operation
-1 PAM clock error (1) Check the PAM clock for proper input.
(1) Replace the outdoor unit control PWB assembly.
Indoor unit in operationOutdoor unit in complete shutdown
17 -0 Wires between units
Serial open-circuit (1) Check the wires between units.
(1) Connect stable power supply.
(2) Check voltage between Nos. 1 and 2 on the indoor/outdoor unit termi-nal boards.
(2) Replace the outdoor unit control PCB assembly.
Outdoor unit does not turn on due to erroneous wiring
(1) Check the wires between units.
(1) Correct the wiring.
(2) Check the outdoor unit fuse.
(2) Replace the fuse/out-door unit control PCB assembly.
(3) Check 15-V, 13-V and 5-V voltages on the PWB.Check resistance between IPM terminals.
(3) Replace the outdoor unit control PCB assembly.
(4) Check pins No. 5 and 7 of connector CN3 of the out-door unit fan motor for short-circuit.
(4) Replace the outdoor unit fan motor.
(5) Outdoor unit control PCB (5) Replace the outdoor unit control PCB board.
18 -0 Serial short-circuit (1) Check the wires between units.
(1) Correct the wiring.
-1 Serial erroneous wir-ing
(1) Check the wires between units.
(1) Correct the wiring.
Status of indoor/outdoor
units
Indication by LED1 on out-
door unit *2
Malfunction No. dis-
played on main unit
display sec-tion *1
Content of diagnosis Inspection location/method Remedy
Main cate-gory
Sub-cate-gory
Main category Sub-category
3 – 16
AYXP9FRN
Indoor/outdoor units in complete shutdown
19 -0 Indoor unit fan Indoor unit fan error (1) Check the indoor fan motor for proper rotating operation.(Check fan lock.)
(1) Replace the indoor fan motor.
(2) Check the lead wire of the indoor fan motor for open-circuit.
(2) Replace the indoor fan motor.
(3) Check CN1 of the indoor unit fan motor for secure installation.
(3) Correct the installa-tion of CN1 of the indoor fan motor.
(4) No abnormality found in above inspections (1) through (3).
(4) Replace the indoor unit control PWB.
Indoor/outdoor units in operation
20 -0 Indoor unit con-trol PCB
EEPROM data error (EEPROM read data error)
Replace the indoor unit control PWB.
Indoor/outdoor units in operation
88 Control and dis-play PCB
Communication error
(1) Check for disconnected connector between control PCB and display PCB, and open-circuit in lead wires.
(1) Insert connectors cor-rectly, or replace con-trol PWB.
(2) Check that control PCB outputs signals correctly.
(2) Replace control PWB.
Status of indoor/outdoor
units
Indication by LED1 on out-
door unit *2
Malfunction No. dis-
played on main unit
display sec-tion *1
Content of diagnosis Inspection location/method Remedy
Main cate-gory
Sub-cate-gory
Main category Sub-category
3 – 17
AYXP9FRN
Malfunction indications due to erroneous wiring during air conditioner installationInter-unit wiring error mode Symptom1 Indoor unit relay
Malfunction diagnosis displayTurns On momentarily, then turns Off."18-1"
2 Indoor unit relayMalfunction diagnosis display
Relays turns Off after about 30 minutes.None(Displays "18-0" when malfunction code is called out.)
3 Indoor unit relayMalfunction diagnosis display
Relays turns Off after about 30 minutes.None(Displays "18-0" when malfunction code is called out.)
4 Indoor unit relayMalfunction diagnosis display
Turns On momentarily, then turns Off."18-1"
5 Indoor unit relayMalfunction diagnosis display
Turns On momentarily, then turns Off."18-1"
Indoorunit
Outdoorunit
1
N
2
1
N
2
Indoorunit
Outdoorunit
1
N
2
1
N
2
Indoorunit
Outdoorunit
1
N
2
1
N
2
Indoorunit
Outdoorunit
1
N
2
1
N
2
Indoorunit
Outdoorunit
1
N
2
1
N
2
3 – 18
AYXP9FRN
AYXP9FRN Service Manual CHAPTER 4. REFRIGERATION CYCLE[1] FLOW FOW REFRIGERANT
[2] STANDARD CONDITION
* REFRIGERANT PIPE LENGTH 5.0m
[3] TEMPERATURE AT EACH PART AND PRESSURE IN 3-WAY VALVE
Indoor side Outdoor sideDry-bulb Temp. (°C) Relative Humidity (%) Dry-bulb Temp. (°C) Relative Humidity (%)
Cooling 27 47 35 40Heating 20 – 7 87
Model AY-XP9FR-N
Operation model MAX. TEST RUNCool Heat Cool Heat
Hz57 more than 90 42 42
No.1 67 73 63 552 38 16 37 73 14 34 14 264 13 2 17 5
3-way valve pressure (MPaG) 1.17 3.28 1.25 2.25
s
14
C
2
Accumulator
3
Strainer
Expansionvalve
Heating Cooling
Outdoor unit
Condenser
EvaporatorIndoor unit
Reverse valve
Comp-ressor
Flare coupling Flare coupling
3-wayvalve
2-wayvalve
Silencer
Coil
4 – 1
AYXP9FRN
[4] PERFORMANCE CURVESNOTE: 1) Indoor fan speed: Hi2) Vertical adjustment louver "45°", Horizontal adjustment louver "front"
3) Indoor air temp. : Cooling 27°C, Heating 20°C
4) Power source : 230V, 50Hz
1. AY-XP9FR-N
1.1. At Cooling 1.2. At Heating
25 30 35 40
3.0
2.8
2.6
2.4
2.2
2.0
600
550
500
450
Coo
ling
capa
city
(kW
)
Outside air temp.(ºC)
Inpu
t(W
)
-5 0 75 10
Hea
ting
capa
city
(kW
)
Outside air temp.(ºC)
Inpu
t(W
)
4.0
3.5
3.0
2.5
2.0
750
700
650
600
550
4 – 2
REPLACEMENT PARTS LIST
CONTENTS
AYXP9FRN
INDOOR UNIT
AY-XP9FR-NOUTDOOR UNIT
AE-X9FR-N
SPLIT TYPEROOM AIR CONDITIONER
MODELS
[1] INDOOR UNIT PARTS
[2] OTHER PARTS (Indoor unit)
[3] OUTDOOR UNIT PARTS
[4] OTHER PARTS
INDEX
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace theseparts with specified ones for maintaining the safety and performance of the set.
This document has been published to be usedfor after sales service only.The contents are subject to change without notice.
“HOW TO ORDER REPLACEMENT PARTS”To have your order filled promptly and correctly, please furnish thefollowing information.
1. MODEL NUMBER 2. REF. No.3. PART NO. 4. DESCRIPTION
★ MARK: SPARE PARTS-DELIVERY SECTION
AYXP9FRN
[1] INDOOR UNIT PARTS
4-8
2-36
2-46
2-43
2-42
2-41
2-29
2-10
2-24
2-21
2-32
2-18
1-14
2-44
2-45
2-40
2-34
1-10
2-302-37
1-11
2-12
2-22
2-23
1-12
1-17
1-201-15
1-191-16
1-18
2-28
2-354-3
4-9
2-9
4-2
4-4
2-4
3-3
2-6
2-7
2-5
1-3
1-21-4
2-1
2-3
4-5
3-2
3-1
1-1
2-2
4-7 4-6-1
3-1-1
4-1
2-9-1
2-9-2
2-9-3
2-10-6
2-10-9
2-10-4
2-10-8
2-10-7
2-7-1
2-7-3
2-7-2
2-5-3
2-5-32-5-1
1-1-2
1-1-3
2-5-4
2-8-1
2-8-22-3-1
2-3-2
2-5-2
2-5-2
2-10-22-10-3
2-10-1
2-10-11
2-10-11
2-10-10
1-10-3 1-10-1
1-10-2
2-10-5
2-19
2-20
2-11
2-33
2-392-38
1-13
2-13
2-16
2-17
2-15
2-14
1-21
1-8
1-51-6
1-7
1-9
2
AYXP9FRN
NO. PARTS CODE PRICE RANK
NEW MARK
PART RANK DESCRIPTION
[1] INDOOR UNIT PARTS1-1 CMOT-A437JBKZ BQ Fan motor sub ass'y
1-1-2 PGUMMA279JBEZ AU Motor cushion1-1-3 PGUMMA280JBEZ AU Motor cushion1-2 QW-VZE973JBZZ AH Lead wire1-3 RMOT-A116JBZZ AP Louver motor1-4 RMOT-A117JBZZ AP Louver motor1-5 QW-VZF246JBZZ AU Lead wire1-6 QW-VZF247JBZZ AU Lead wire1-7 QW-VZE970JBZZ AE Lead wire1-8 QW-VZF173JBZZ AF Lead wire1-9 RFIL-A064JBE0 AF Ferrite core1-10 FSGY-A295JBKZ BQ Hi voltage unit assy
1-10-1 CKITTA073AKKZ BE Plasmacluster unit1-10-2 QW-VZE859JBZZ AM Lead wire1-10-3 LHLD-A714JBFA AU Holder1-11 QW-VZE972JBZZ AP Lead wire1-12 DPWBFA462JBKZ BS Control board unit1-13 DPWBFA398JBKZ BL Sub control board k1-14 DPWBFA397JBKZ AU Display board unit1-15 QTANZA022JBZZ AH Terminal board1-16 QTANZA026JBZZ AK Terminal board1-17 QACC-A319JBZZ AU Power supply cord1-18 QW-VZE965JBZZ AE Lead wire1-19 QW-VZE966JBZZ AE Lead wire1-20 RH-HXA048JBZZ AP Themistor k1-21 QTANZA021JBZZ AN Terminal board2-1 PCOV-B062JBFA AH Cover2-2 CCOV-A113JBKZ BE Cabinet cover ass'y2-3 CCOV-A119JBKZ BE Cover ass'y
2-3-1 FCOV-A199JBRA AK Cover2-3-2 PCOV-B118JBFA AK Cover2-4 PGID-A127JBFZ AG Guide2-5 CDAI-A020JBKZ BE Louver base ass'y
2-5-1 MJNTPA115JBFA AH Louver link2-5-2 MLOV-A393JBFA AH Vertical louver2-5-3 MLOV-A414JBFA AH Vertical louver2-5-4 PDAI-A161JBFA AH Louver base2-6 CHLD-A112JBKZ AZ Bearing ass'y2-7 CLOV-A055JBKZ AU Louver ass'y
2-7-1 LHLD-A722JBFA AM Louver holder2-7-2 LHLD-A723JBFA AM Louver holder2-7-3 MLOV-A394JBFA AH H-louver2-8-1 HPNL-A778JBRA AZ Open panel2-8-2 HBDG-A002KKEA AE Al badge2-9 CPNL-A526JBKZ BD Cont.box cover ass'y
2-9-1 GBTN-A007JBFA AU Button2-9-2 PCOV-B068JBWZ AH Box cover2-9-3 PCOV-B215JBFA AF Cover2-10 CSRA-A647JBKZ BG Drain pan ass'y
2-10-1 CHOS-A018JBKZ AN Drain hose ass'y2-10-2 LPLT-A058JBPZ AC Hose holder2-10-3 PHOS-A044JBEZ AM Drain hose2-10-4 DSRA-A275JBKZ BE Drain pan sub ass'y2-10-5 GGAD-A063JBTA AQ Wire guard2-10-6 LPFT-A155JBFZ AG Drain joint2-10-7 MJNT-A019JBFA AM Joint2-10-8 MLOV-A395JBFA AU Air flow louver2-10-9 PGUMMA110JBE0 AD Drain plug2-10-10 LHLD-A712JBFZ AU Lead wire guide2-10-11 NBRG-A038JBFA AC Bearing c2-11 CWAK-C619JBKZ BH Front panel ass'y2-12 DCHS-A537JBKZ BC Cabinet ass'y2-13 DCOV-A261JBKZ AH Cover ass'y2-14 DDAI-A058JBKZ BA Holder ass'y2-15 LHLD-A767JBFA AH Terminal holder2-16 PCOV-B168JBWZ AL Cover2-17 PDAI-A170JBFA AQ Holder2-18 PCOV-B157JBFA AF Cover2-19 TLABCC037JBRZ AE Wiring diagram2-20 TSPC-F317JBRZ AK Name badge2-21 HDECQA130JBRA AZ Display panel2-22 LHLD-A303JBFA AD Tube cover2-23 LHLD-A711JBFZ AU Bering holder2-24 LHLD-A751JBFA AH Led holder2-28 MSPR-A168JBEZ AC Spring2-29 NFANCA103JBKZ AZ Cross flow fan2-30 PCOV-B065JBFZ AH Motor cover2-32 PCOV-B163JBFA AF Cover2-33 PDAI-A182JBFZ AH Holder2-34 PFILMA209JBEZ AQ Air filter2-35 PPLTNA083JBWZ AT Mounting angle2-36 PSEL-C885JBEZ AC Seal2-37 PSEL-C900JBEZ AF Seal2-38 PCOV-B183JBFZ AH Holder2-39 PCOV-B184JBFZ AH Holder
3
AYXP9FRNPRICE NEW PART
NO. PARTS CODE RANK MARK RANK DESCRIPTION2-40 PCOV-B113JBFZ AM Led guide2-41 PDAI-A179JBFZ AH Terminal base2-42 PBOX-A457JBFA AP Control box2-43 PCOV-B071JBPZ AN Cont.box cover2-44 PFPFPC877JBEZ AC Insulator2-45 PFPFPC708JBEZ AC Seal2-46 LHLD-A715JBFZ AU Thermistor holder3-1 CPIPCA916JBKZ BE Inlet tube ass'y
3-1-1 PFPFPB954JBEZ AG Cabinet insulator e3-2 DEVA-A267JBKZ BZ Evaporator ass'y3-3 DCOV-A260JBKZ AM Cover-l ass'y4-1 CFIL-A108JBKZ AR Purify filter ass'y4-2 CRMC-A673JBEZ BA Remote control4-3 FFZK-A210JBKZ AN Screws kit4-4 LPFT-A029JBF0 AD Drain joint4-5 LHLD-A731JBFA AU Cord holder
4-6-1 TINS-A982JBRZ AR Installation manual14-7 TINSEA448JBRZ AR Operation manual4-8 UBATUA027JBE0 AE Battery pack4-9 TLAB-C926JBEZ AK Eu energy label
[2] OTHER PARTS (Indoor unit)2-25 LHLDW0362JBE0 AA Wire holder2-26 LHLDW0365JBE0 AA Wire holder2-27 LX-BZA075JBE0 AA Special screw4-3-1 LX-BZA357JBEZ AE Special screw4-10 TLABKE028JBRZ AF No card90-1 CPADBA085JBKZ AK Packing pad ass'y90-2 SPADBA216JBEZ AF Pad90-3 SPAKCC043JBEZ AX Packing case90-4 SSAKAA106JBEZ AE Bag
[1] INDOOR UNIT PARTS
4
AYXP9FRN
[3] OUTDOOR UNIT PARTS
2-17
2-36
2-34
2-33
2-18
2-21
1-11
2-19
2-31
2-26
3-12
1-10
2-27
2-35
3-15
3-14
3-13
3-10
2-28
2-20
2-7-1
2-7-2
2-30
2-25
2-132-14
2-1
1-4
1-5
3-9
3-5
3-1
1-4
2-32
3-20
2-15
2-162-6
3-2
2-4
2-4
1-7
1-3
1-1
2-2
2-32-7
2-9
2-10
2-11
1-2-71-2-6
2-8
1-2
2-37
2-392-38
1-6
2-12
3-163-18
3-173-19
3-8
3-6
5
AYXP9FRN
NO. PARTS CODE PRICE RANK
NEW MARK
PART RANK DESCRIPTION
[3] OUTDOOR UNIT PARTS1-1 CMOTLB078JBEZ BL Fan moter1-2 DSGY-B834JBKZ CA Control board unit
1-2-6 RH-IXA790JBZZ BC Ipm1-2-7 VHDRBV2506+-F AL Diode bridge1-3 QW-VZF245JBZZ AP Lead wire1-4 RCILZA009JBZZ BA Reactor1-5 RTHM-A022JBE0 AN Thermistor1-6 QTANZA001JBZZ AQ Terminal board1-7 FW-VZA056JBKZ AR Lead wire1-10 RFIL-A064JBE0 AF Ferrite core1-11 RH-HXA029JBZZ AX Thermistor ass'y2-1 LANGKA157JBPZ AQ Motor angle2-2 CCAB-A408JBKZ BA Top plate ass'y2-3 TLABCC170JBRZ AC Wiring diagram2-4 LX-BZA355JBEZ AE Special screw2-6 LANG-A504JBYZ AP Reactor angle2-7 CFTA-A268JBKZ AN Cover
2-7-1 PCOV-A594JBPZ AE Terminal cover2-7-2 PFTA-A090JBFA AL Cover2-8 PRDAFA191JBEZ AR Heat sink2-9 LHLD-A684JBFA AN Holder2-10 LHLD-A685JBFA AF Holder2-11 DBOX-A049JBWZ AT Control box ass'y2-12 PDAI-A187JBWZ AH Terminal holder2-13 PCOV-A595JBFZ AE Cover2-14 PSKR-A284JBPZ AT Bulkhead2-15 GCAB-A220JBTA BC Front panel2-16 GGADPA007JBFA AS Fan gaurd2-17 JHNDPA015JBFA AD Handle2-18 LHLD-A449JBF0 AH Thermistor holder2-19 LHLD-A491JBFZ AD Cord clamp2-20 LHLD-A492JBFZ AD Cord clamp base2-21 MSPR-A026JBE0 AB Spring2-25 NFANPA118JBEZ AU Propeller fan2-26 PPLT-A375JBTA AW Side cover r2-27 PSPF-A918JBEZ AT Comp cover top2-28 PSPF-A919JBEZ AE Compressor cover2-30 CANG-A165JBKZ AH Holder ass'y2-31 TLAB-C511JBRA AC Label2-32 TLABBA160JBRA AL IVT LABEL2-33 TSPC-F318JBRZ Name badge2-34 PPLT-A195JBTA AS Side cover L2-35 PSEL-C830JBEZ AF Seal2-36 CHET-A025JBKZ BM Heater ass'y2-37 PCOV-A997JBWZ AM Cover2-38 PSEL-C685JBEZ AC Seal2-39 PSEL-C686JBEZ AC Seal3-1 CCHS-A931JBTA BB Base pan ass'y3-2 DVLV-A652JBKZ AV 3way valve unit3-5 DVLV-A572JBKZ AQ 2way valve unit3-6 CVLV-A799JBKZ BS Reverse valve ass'y3-8 CCIL-A129JBKZ AU Coil ass'y3-9 PVLVXA061JBEZ BD Reverse valve3-10 PDAI-A123JBTA AL Flare coupling base3-12 DCON-A291JBPZ BX Condenser ass'y3-13 PCMPRA430JBEZ CC Compressor3-14 GLEG-A099JBE0 AD Compressor cushion3-15 LX-NZA313JBEZ AE Special nut3-16 LX-NZA002JBE0 AA Special nut3-17 MSPR-A157JBEZ AD Protector spring3-18 PCOV-A736JBEZ AH Terminal cover3-19 PSEL-C248JBEZ AG Terminal gasket3-20 PSPF-A977JBEZ Compressor cover
[4] OTHER PARTS1-2-1 QFS-CA001JBZZ AK Fuse (20A 250V)1-2-2 QFS-GA051JBZZ AD Fuse1-2-3 QFS-GA052JBZZ AD Fuse1-2-4 QFS-CA002JBZZ AH Fuse (15A 250V)1-2-5 QFS-GA064JBZZ AF Fuse2-23 MSPR-A036JBE0 AB Thermistor spring2-24 MSPR-A143JBEZ AD Spring3-7 DVLV-A662JBKZ BL Control valve ass'y90-1 CPADBA048JBKZ AF Top pad ass'y90-2 CPADBA049JBKZ AM Bottom pad ass'y90-3 SPAKCC044JBEZ AS Packing case
6
AYXP9FRN
INDEX
PARTS CODE No. PRICE RANK
NEW MARK
PART RANK
[ C ]CANG-A165JBKZ 3-2-30 AHCCAB-A408JBKZ 3-2-2 BACCHS-A931JBTA 3-3-1 BBCCIL-A129JBKZ 3-3-8 AUCCOV-A113JBKZ 1-2-2 BECCOV-A119JBKZ 1-2-3 BECDAI-A020JBKZ 1-2-5 BECFIL-A108JBKZ 1-4-1 ARCFTA-A268JBKZ 3-2-7 ANCHET-A025JBKZ 3-2-36 BMCHLD-A112JBKZ 1-2-6 AZCHOS-A018JBKZ 1-2-10-1 ANCKITTA073AKKZ 1-1-10-1 BECLOV-A055JBKZ 1-2-7 AUCMOT-A437JBKZ 1-1-1 BQCMOTLB078JBEZ 3-1-1 BLCPADBA048JBKZ 4-90-1 AFCPADBA049JBKZ 4-90-2 AMCPADBA085JBKZ 2-90-1 AKCPIPCA916JBKZ 1-3-1 BECPNL-A526JBKZ 1-2-9 BDCRMC-A673JBEZ 1-4-2 BACSRA-A647JBKZ 1-2-10 BGCVLV-A799JBKZ 3-3-6 BSCWAK-C619JBKZ 1-2-11 BH
[ D ]DBOX-A049JBWZ 3-2-11 ATDCHS-A537JBKZ 1-2-12 BCDCON-A291JBPZ 3-3-12 BXDCOV-A260JBKZ 1-3-3 AMDCOV-A261JBKZ 1-2-13 AHDDAI-A058JBKZ 1-2-14 BADEVA-A267JBKZ 1-3-2 BZDPWBFA397JBKZ 1-1-14 AUDPWBFA398JBKZ 1-1-13 BLDPWBFA462JBKZ 1-1-12 BSDSGY-B834JBKZ 3-1-2 CADSRA-A275JBKZ 1-2-10-4 BEDVLV-A572JBKZ 3-3-5 AQDVLV-A652JBKZ 3-3-2 AVDVLV-A662JBKZ 4-3-7 BL
[ F ]FCOV-A199JBRA 1-2-3-1 AKFFZK-A210JBKZ 1-4-3 ANFSGY-A295JBKZ 1-1-10 BQFW-VZA056JBKZ 3-1-7 AR
[ G ]GBTN-A007JBFA 1-2-9-1 AUGCAB-A220JBTA 3-2-15 BCGGAD-A063JBTA 1-2-10-5 AQGGADPA007JBFA 3-2-16 ASGLEG-A099JBE0 3-3-14 AD
[ H ]HBDG-A002KKEA 1-2-8-2 AEHDECQA130JBRA 1-2-21 AZHPNL-A778JBRA 1-2-8-1 AZ
[ J ]JHNDPA015JBFA 3-2-17 AD
[ L ]LANG-A504JBYZ 3-2-6 APLANGKA157JBPZ 3-2-1 AQLHLD-A303JBFA 1-2-22 ADLHLD-A449JBF0 3-2-18 AHLHLD-A491JBFZ 3-2-19 ADLHLD-A492JBFZ 3-2-20 ADLHLD-A684JBFA 3-2-9 ANLHLD-A685JBFA 3-2-10 AFLHLD-A711JBFZ 1-2-23 AULHLD-A712JBFZ 1-2-10-10 AULHLD-A714JBFA 1-1-10-3 AULHLD-A715JBFZ 1-2-46 AULHLD-A722JBFA 1-2-7-1 AMLHLD-A723JBFA 1-2-7-2 AMLHLD-A731JBFA 1-4-5 AULHLD-A751JBFA 1-2-24 AHLHLD-A767JBFA 1-2-15 AHLHLDW0362JBE0 2-2-25 AALHLDW0365JBE0 2-2-26 AA
LPFT-A029JBF0 1-4-4 ADLPFT-A155JBFZ 1-2-10-6 AGLPLT-A058JBPZ 1-2-10-2 ACLX-BZA075JBE0 2-2-27 AALX-BZA355JBEZ 3-2-4 AELX-BZA357JBEZ 2-4-3-1 AELX-NZA002JBE0 3-3-16 AALX-NZA313JBEZ 3-3-15 AE
[ M ]MJNT-A019JBFA 1-2-10-7 AMMJNTPA115JBFA 1-2-5-1 AHMLOV-A393JBFA 1-2-5-2 AHMLOV-A394JBFA 1-2-7-3 AHMLOV-A395JBFA 1-2-10-8 AUMLOV-A414JBFA 1-2-5-3 AHMSPR-A026JBE0 3-2-21 ABMSPR-A036JBE0 4-2-23 ABMSPR-A143JBEZ 4-2-24 ADMSPR-A157JBEZ 3-3-17 ADMSPR-A168JBEZ 1-2-28 AC
[ N ]NBRG-A038JBFA 1-2-10-11 ACNFANCA103JBKZ 1-2-29 AZNFANPA118JBEZ 3-2-25 AU
[ P ]PBOX-A457JBFA 1-2-42 APPCMPRA430JBEZ 3-3-13 CCPCOV-A594JBPZ 3-2-7-1 AEPCOV-A595JBFZ 3-2-13 AEPCOV-A736JBEZ 3-3-18 AHPCOV-A997JBWZ 3-2-37 AMPCOV-B062JBFA 1-2-1 AHPCOV-B065JBFZ 1-2-30 AHPCOV-B068JBWZ 1-2-9-2 AHPCOV-B071JBPZ 1-2-43 ANPCOV-B113JBFZ 1-2-40 AMPCOV-B118JBFA 1-2-3-2 AKPCOV-B157JBFA 1-2-18 AFPCOV-B163JBFA 1-2-32 AFPCOV-B168JBWZ 1-2-16 ALPCOV-B183JBFZ 1-2-38 AHPCOV-B184JBFZ 1-2-39 AHPCOV-B215JBFA 1-2-9-3 AFPDAI-A123JBTA 3-3-10 ALPDAI-A161JBFA 1-2-5-4 AHPDAI-A170JBFA 1-2-17 AQPDAI-A179JBFZ 1-2-41 AHPDAI-A182JBFZ 1-2-33 AHPDAI-A187JBWZ 3-2-12 AHPFILMA209JBEZ 1-2-34 AQPFPFPB954JBEZ 1-3-1-1 AGPFPFPC708JBEZ 1-2-45 ACPFPFPC877JBEZ 1-2-44 ACPFTA-A090JBFA 3-2-7-2 ALPGID-A127JBFZ 1-2-4 AGPGUMMA110JBE0 1-2-10-9 ADPGUMMA279JBEZ 1-1-1-2 AUPGUMMA280JBEZ 1-1-1-3 AUPHOS-A044JBEZ 1-2-10-3 AMPPLT-A195JBTA 3-2-34 ASPPLT-A375JBTA 3-2-26 AWPPLTNA083JBWZ 1-2-35 ATPRDAFA191JBEZ 3-2-8 ARPSEL-C248JBEZ 3-3-19 AGPSEL-C685JBEZ 3-2-38 ACPSEL-C686JBEZ 3-2-39 ACPSEL-C830JBEZ 3-2-35 AFPSEL-C885JBEZ 1-2-36 ACPSEL-C900JBEZ 1-2-37 AFPSKR-A284JBPZ 3-2-14 ATPSPF-A918JBEZ 3-2-27 ATPSPF-A919JBEZ 3-2-28 AEPSPF-A977JBEZ 3-3-20PVLVXA061JBEZ 3-3-9 BD
[ Q ]QACC-A319JBZZ 1-1-17 AUQFS-CA001JBZZ 4-1-2-1 AKQFS-CA002JBZZ 4-1-2-4 AHQFS-GA051JBZZ 4-1-2-2 AD
PARTS CODE No. PRICE RANK
NEW MARK
PART RANK
7
AYXP9FRN
QFS-GA052JBZZ 4-1-2-3 ADQFS-GA064JBZZ 4-1-2-5 AFQTANZA001JBZZ 3-1-6 AQQTANZA021JBZZ 1-1-21 ANQTANZA022JBZZ 1-1-15 AHQTANZA026JBZZ 1-1-16 AKQW-VZE859JBZZ 1-1-10-2 AMQW-VZE965JBZZ 1-1-18 AEQW-VZE966JBZZ 1-1-19 AEQW-VZE970JBZZ 1-1-7 AEQW-VZE972JBZZ 1-1-11 APQW-VZE973JBZZ 1-1-2 AHQW-VZF173JBZZ 1-1-8 AFQW-VZF245JBZZ 3-1-3 APQW-VZF246JBZZ 1-1-5 AUQW-VZF247JBZZ 1-1-6 AU
[ R ]RCILZA009JBZZ 3-1-4 BARFIL-A064JBE0 1-1-9 AF
" 3-1-10 AFRH-HXA029JBZZ 3-1-11 AXRH-HXA048JBZZ 1-1-20 APRH-IXA790JBZZ 3-1-2-6 BCRMOT-A116JBZZ 1-1-3 APRMOT-A117JBZZ 1-1-4 APRTHM-A022JBE0 3-1-5 AN
[ S ]SPADBA216JBEZ 2-90-2 AFSPAKCC043JBEZ 2-90-3 AXSPAKCC044JBEZ 4-90-3 ASSSAKAA106JBEZ 2-90-4 AE
[ T ]TINS-A982JBRZ 1-4-6-1 ARTINSEA448JBRZ 1-4-7 ARTLABBA160JBRA 3-2-32 ALTLAB-C511JBRA 3-2-31 ACTLAB-C926JBEZ 1-4-9 AKTLABCC037JBRZ 1-2-19 AETLABCC170JBRZ 3-2-3 ACTLABKE028JBRZ 2-4-10 AFTSPC-F317JBRZ 1-2-20 AKTSPC-F318JBRZ 3-2-33
[ U ]UBATUA027JBE0 1-4-8 AE
[ V ]VHDRBV2506+-F 3-1-2-7 AL
PARTS CODE No. PRICE RANK
NEW MARK
PART RANK
8