Service manual compleet KFRS 9

Heat Pump Water Heater（（（（Northern Europe））））

Service Manual

GREE ELECTRIC APPLIANCES INC. OF ZHUHAI

CONTENTS RODUCT INTRODUCTION .....................................................................................2

1 MODELS LIST............................................................................................................................. 2 2 NOMENCLATURE...................................................................................................................... 2 3 FUNCTION .................................................................................................................................. 3 4 PRODUCT DATA......................................................................................................................... 4

4.1 Product Data at Rated Condition........................................................................................ 4 4.2 Ambient Temp Range......................................................................................................... 4 4.3 Electrical Data.................................................................................................................... 5

5 PIPING DIAGRAM...................................................................................................................... 6

UNITS CONTROL ......................................................................................................8

1 OPERATION FLOWCHART....................................................................................................... 8 2 MAIN LOGIC............................................................................................................................. 10

2.1 Heating Mode................................................................................................................... 10 2.2 Defrosting Mode .............................................................................................................. 10

3 WIRED CONTROLLER ............................................................................................................ 11 3.1 Dimension ........................................................................................................................ 11 3.2 Function ........................................................................................................................... 11 3.3 Installation........................................................................................................................ 14

4 CONTROL WIRING DESIGN................................................................................................... 16

UNITS INSTALLATION ..........................................................................................18

1 UNITS INSTALL........................................................................................................................ 18 1.1 Installation Positions ........................................................................................................ 18 1.2 Matters need Attention ..................................................................................................... 18 1.3 Dimension Date................................................................................................................ 18 1.4 Installation Clearance Date .............................................................................................. 19

2 ELECTRIC WIRING WORK..................................................................................................... 21 2.1 Wiring Principle ............................................................................................................... 21 2.2 Electric Wiring Design..................................................................................................... 21 2.3 Specification of Power Supply Wire and Air Switch ....................................................... 22

UNITS MAINTENANCE..........................................................................................24

1 ERROR CODE LIST .................................................................................................................. 24 2 FLOW CHART OF TROUBLESHOOTING ............................................................................. 25 3 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS.................................... 31 4 EXPLODED VIEWS AND PART LIST..................................................................................... 37

4.1 Single Fan ........................................................................................................................ 37 4.2 Double Fan....................................................................................................................... 38

GREE COMMERCIAL AIR CONDITIONERS HEAT PUMP WATER HEATER (NORTHERN EUROPE)

1

PRODUCT

HEAT PUMP WATER HEATER (NORTHERN EUROPE) PRODUCT

2

RODUCT INTRODUCTION

1 MODELS LIST

Model

Refrigerant Model Name

Nominal Capacity

(kW) Power Supply

(V,Ph,Hz) Appearance

KFRS-9/Na-M 9.0

R410A

GRS-S16/Na-M(O) 16

380～415V 3Ph 50Hz

Note:1Ton =12000Btu/h = 3.517kW

2 NOMENCLATURE

K F RS - 9 / Na - M

1 2 3 4 5 6


3

NO. Description Options

1 Air Source 2 Split Type F= Split Type, Default= Integral Type 3 Heat Pump Water Heater 4 Heating Capacity 9KW 6 Refrigerant Na=R410A, Default=R22

7 Voltage M=380～415V 3Ph 50Hz

G RS - S 16 / Na - M (0)

1 2 3 4 5 6 7

NO. Description Options 1 GREE 2 Heat Pump Water Heater 3 Static S= Static ,C =Circulating 4 Heating Capacity 16KW 5 Refrigerant Na=R410A, Default=R22

6 Voltage M=380～415V 3Ph 50Hz

7 Outdoor Unit O= Outdoor Unit ,I=Indoor Unit

3 FUNCTION

Function Description

Heating

Memory restart High efficiency and energy saving Environmentally friendly Healthy and comfortable Friendly man-machine interface Easy installation Low noise design Safety and reliability thanks to advance compressor balance control


4

4 PRODUCT DATA

4.1 Product Data at Rated Condition

Technical parameters of host unit

Models KFRS-9/Na-M GRS-S16/Na-M(O)

kW 9 16

Btu/h 30708 54592 Nominal Capacity Heating

RT 2.56 4.55

Power Consumption Heating kW 3 5.5

Power Supply 380~415V,3Ph,50Hz

Safeties High/Low pressure switch, compressor thermal

protection, over current protection, lose of phase/anti-phase protection, antifreeze protection,

Type R410A Refrigerant Charge kg 3.3 4.5

Type scroll Compressor NO. 1 1

Heat Exchanger Aluminum fin-copper tube

Liquid mm 1/2" 1/2" Evaporator Connection Pipe Gas mm 3/4" 3/4"

Height mm 840/985 1250/1405 Width mm 1018/1110 1032/1110

Unit/ Packing

Dimension Depth mm 412/450 412/450

Net / Gross Weights kg 90/100 132/145

NOTE：Testing condition of heating :Setting temp of outlet water: 45℃, outdoor ambient temp : DB7℃/WB6

℃.

4.2 Ambient Temp Range

Ambient temp range of unit during operation: -15~28℃.


5

4.3 Electrical Data

Fan Motor Compressor

Outdoor Total

Model Rated Power Supply NO.

LRA each （A）

MRC each （A）

NO. MRC （A）

MRC （A）

NRC （A）

KFRS-9/Na-M 1 48 10.8 1 1.5 12.3 8.2

GRS-S16/Na-M(O)

380~415V 3Ph 50Hz 1 74 15.0 2 2 19.5 12.0

Notes: LRA: Locked rotor amps (A) MRC: Maximum running current (A) NRC: Nominal running current (A)


6

5 PIPING DIAGRAM

Hot water

City water

Thermal expansion valve

Liquid-gas separator

Low-pressureswitch

Compressor

High-pressure switch

Water tank

Four-way valve

Aluminum fin-copper tube coil

High pressure tank


7

CONTROL


8

UNITS CONTROL

1 OPERATION FLOWCHART

HEAT PUMP WATER HEATER (NORTHERN EUROPE) INSTALLATION

9


10

2 MAIN LOGIC

2.1 Heating Mode

When press ON button, if the temperature of water tank meets the heating running requirements,

it starts the fans of outdoor unit. Then the compressor will run after 15s.

If the temperature of water tank is over the set temperature , the unit will stop, and turn off all

loads .The fans of outdoor unit will stop after 15s.

Turn on

Fan 1

Compressor

Turn off

Four-way Valve

15S

Fan 2 When it is turned off

15S5S

30S

When it is turned off

2.2 Defrosting Mode

The condition of start defrosting mode:

Under heating mode, if the accumulative running time of compressor is over the set interval time

of defrosting（default 45min），and the defrosting temperature is lower than the set starting

temperature(default -4℃) ,the unit will start running defrosting mode, and the 4-way valve will shut


11

off and the outdoor fan will stop after 2s.

The condition of quit defrosting mode:

Under defrosting mode, if the continual defrosting time is over the set continual time of defrosting

（default 8min），and the defrosting temperature is over the set stopping temperature(default 20℃) ,the

unit will restart running heating mode, and the 4-way valve will turn on and the outdoor fan will run.

3 WIRED CONTROLLER

3.1 Dimension

3.2 Function

3.2.1 Operation View


12

OFF

QUIT

ON

CHECK

MODE

NO. Name Function description

1 MODE button This button is available only on heating unit.

2 CHECK button

Press it once under normal state to enter check mode, under check mode, press this button when “17” is displayed can change the value of “17”. Under parameter set mode, press this once can switch the adjusting objection between parameter and value, press this button for long (about 5s) to save and quit this parameter setting.

3 Increasing button To increase present set value or change set/check object.

4 Decreasing button To decrease present set value or change set/check object.

5 QUIT button

Under Set and Check mode, press it once to quit this mode. Under parameter set mode, this set value would not be saved. Press this button for long (about 5s) to set sound, and make sound switches between always on and always off.

6 ON button To turn on the unit; press it once to quit compel operation when the unit is under compel operation.

7 OFF button To turn off the unit; press it once to quit compel operation when the unit is under compel operation.

8 LCD display Display information of the unit.


13

Note：

(1) Turn On, Off Auxiliary Heater: It is only available for heat pump unit. Press CHECK once to enter

Check mode. Press ▲ and ▼ to change check object, press CHECK again till the present check

object becomes “17”, value “17” switches between 01/03 (auxiliary heater on) and 00/02 (auxiliary

heater off). That is 00 Off —>01 On —>00 Off, or 02 Off —>03 On —>02 Off.

(2) Check Parameter: After electrify for 20s, press QUIT then ▲ to enter parameter checking mode.

Under this mode, Auxiliary display area shows the checking object, Main display area displays the

value for the checking object. Press ▲ and ▼ to change the checking object. Press QUIT to quit

from the check mode.

3.2.2 Display View

NO. Name Function description

1 Running mode display : heating mode

2 Temp display It shows temperature value displays at main display area.

3 Auxiliary display area It contains 2 numbers and a comma, for showing temperature and number of parameter at main display area. It only displays when under Check mode and Parameter checking mode.

4 Main display area

It contains a minus, 2 numbers and 1 temperature unit, for displaying value of temperature and parameter (temperature or time value) and error code. When temperature value is displayed, it shows value in algorism and temperature unit; when time is displayed, it shows algorism value but no temperature unit (default unit is min); when it is code, it displays specific error (refer to Malfunction Error List) but no temperature unit.


14

Individual temperature or parameter may exceed 99, then adopt AX for

100～109, bX for 110～119, CX for 120～129, dX for 130～139, EX for

140～149, FX for 150～159, and X stands for a number between 0～9. Under normal state, it shows temperature for back water.

5 Parameter display It means the value shown at present main display area is parameter. It shows only under Parameter Check mode.

6 Defrost display It displays when defrosting, otherwise it doesn’t displays.

7 System ID It displays when system or compressor orders, for showing which system is defrosting.

8 Testing display For testing, it displays under compel operation.

9 Error code display It shows the error code displayed on Main Display Area. It displays when there is error at system or communication.

Caution:

When unit is off, it displays only temperature of water tank. When unit is on, under normal state, if

there is no error, it displays temperature of water tank, if there is error, it displays error code; when

there is no operation after 60s of pressing the button, it quit back to normal state display automatically.

Auto antifreeze operation display (only for heat pump unit)

When auto antifreeze function is started and relevant conditions are satisfied, unit begins auto

antifreeze operation. At this time, LCD main display area displays code d2 (if there is error it displays

error code).

3.3 Installation

First select an installation position. According to the size of the communication line of the wire

controller, leave a recess or a embedded wire hole to bury the communication line.

If the communication line between the wire controller (85×85×20) and the indoor unit is

surface-mounted, use 1# PVC pipe and make matching recess in the wall (refer to Figure 6); If

concealed installation is adopted, 1# PVC pipe can be used (Refer to Figure 7).

No matter if surface mounting or concealed mounting is selected, it is required to drill 2 holes (in

the same level) which distance shall be the same as the distance (60mm) of installation holes in the

bottom plate of the wire controller. Then insert a wood plug into each hole. Fix the bottom plate of the

wire controller to the wall by using the two holes. Plug the communication line onto the control panel.

Lastly install the panel of the wire controller.


15

Caution:

During the installation of the bottom plate of the wire controller, pay attention to the direction of

the bottom plate. The plate’s side with two notches must be at the lower position, and otherwise the

panel of the wire controller cannot be correctly installed.

PVC pi pe

Fig6：Surface Mounting of Cable Fig7：Concealed mounting of Cable

1 32 4

Fig 8 Schematic Diagram of Installation

No. Name

1 Wall Surface

2 Bottom Plate of Wire Controller

3 Screw M4X10

4 Panel of Wire Controller


16

Caution: The communication distance between the main board and the wire controller can be as far as 20m

(The standard distance is 8m).The wire controller shall not be installed in a place where there is water

drop or large amount of water vapor.

4 CONTROL WIRING DESIGN

WIRED CONTROLLER

Manual Unit Controller Outdoor Unit Controller

CN1 CN2

J1 X17

twisted-pair twisted-pair

The controllers of the unit include manual controller, wired controller and outdoor unit controller.

The wired controller communications with manual controller and outdoor unit controller in RS485. The wired controller connects manual controller with 4-line twisted-pair. Similarly, wired controller connects outdoor unit controller with 4-line twisted-pair.


17

INSTALLATION


18

UNITS INSTALLATION

1 UNITS INSTALL

1.1 Installation Positions

For outdoor unit: � The installation is frost-free. � The space around the unit is adequate for servicing. � The space around the unit allows for sufficient air circulation. � There is no danger of fire due to leakage of flammable gas. � All piping lengths and distances have been taken into consideration.

1.2 Matters need Attention

At delivery, the unit should be checked and any damage should be reported immediately to the carrier claims agent.

1.3 Dimension Date

KFRS-9/Na-M

950 340

840

378

412572


19

GRS-S16/Na-M(O)

Unit: mm

1.4 Installation Clearance Date

L3

L2

L4

L1air inlet

air outlet


20

unit：mm

demonstration L1 L2 L3 L4

distance >500 >1000 >500 >500

HEAT PUMP WATER HEATER (NORTHERN EUROPE) MAINTENANCE

21

2 ELECTRIC WIRING WORK

2.1 Wiring Principle

The power cord should firstly connect with dynamic power terminal in electric box and then connect with relevant power terminals of outdoor unit and electric heater. Never mistake the connection to avoid damage to electric elements. If the units is under protection condition. Check out leakage causes to clear the fault and then open the electric box without power supply to reset leakage protector. If leakage protector trips off again, stop the unit and ask professionals for help. Never check or repair it by yourself to avoid safety accident. With green mark is normal , while with red mark

means conglutination between contacts， in which case, it should be replaced after cutting off its power supply.

General principles: � Wires, equipment and connectors supplied for use on the site must be in

compliance with provisions of regulations and engineering requirements.

� Only electricians holding qualification are allowed to perform wire connection

on the site.

� Before connection work is started, the power supply must be shut off.

� Installer shall be responsible for any damage due to incorrect connection of the

external circuit of the unit.

� Caution --- MUST use copper wires. 2.2 Electric Wiring Design

Outdoor Unit Electric Box

L1 L2 L3 N X17XT1

L1 L2 L3 NPE

PE

Intdoor Unit Electric Box CN2XT3

CN1

AP

CN5

4-co

re tw

site

dpa

ir w

ire

AP2

4-co

re tw

site

dpa

ir w

ire

Display Board

L1 L2 L3 N L1 L2 L3

PE

POWER 380-400V 3N Hz

PEElectric heater

XT1 XT2

Water Tank

Water-outlet Temp.Sensor


22

2.3 Specification of Power Supply Wire and Air Switch

Power cable specifications and air switch types in the following list are recommended for selection.

Unit Model Power supply Air switch capacity

(A)

Min. sectional area of

grounding cable (mm2)

Min. sectional area of power

cable (mm2)

KFRS-9/Na-M 380-415V 3N~ 50Hz

13 1.5 4×1.5

GRS-S16/Na-M(O) 380-415V 3N~ 50Hz

25 2.5 4×2.5

Note： � The power supply wire must be copper core wire, and the working temperature can not be

higher than limited value. � If the length of power supply wire is longer than 15meters, do please increase the section

area to avoid any accident due to over-load. � If the supply cord is damaged, it must be replaced by the manufacturer or its service agent

or a similar qualified person in order to avoid a hazard. � The appliance shall be installed according to national regulations � When installing the connection wiring for manual controller, the wire must be put inside a

separate protective sheath to avoid direct sunshine.

Warning! An all-pole disconnection switch having a contact separation of at least 3mm in all

poles should be connected in fixed wiring.


23

MAINTENANCE


24

UNITS MAINTENANCE 1 ERROR CODE LIST

Code Indication Error Name Cause of Error Code Control Description

E1 Comp High-pressure

protection

� Comp High-pressure switch is broken or the wiring is loose.

� The water in the tank is not enough.

� The installation of tank temp sensor is not correct.

� The gas valve and liquid valve are not fully open.

� The thermal expansion valve can not work normally.

Press ON/OFF key to clear

E3 Comp Low- pressure

protection

� Comp Low-pressure switch is broken or the wiring is loose.

� The system has leaked.

� The fans stop running or reverse.


E4 Comp Discharge temp

protection

� The resistance of temperature sensor is not correct.

� The thermal expansion valve is blocked.

� The system has leaked.

� Mainboard of outdoor unit is damaged.


E5 Comp overload protection

� AC contactor is damaged.

� The compressor wiring is not correct.

� The voltage is not normal.

� Overcurrent test board is damaged.

� The refrigerant of the system is excessive.


E8 Fan 1 overload protection


� The wire connecting the wiring terminals of the mainboard

breaks.


b8 Fan 2 overload protection


� The wire connecting the wiring terminals of the mainboard

breaks.


F3 Defrost temp sensor failure

� The plug on temperature sensor is not correctly connected to the

socket on mainboard.


Auto resume

F5 Discharge temp sensor error




Auto resume

F7 Outdoor ambient temp sensor

failure




Auto resume

EC Communication malfunction

� The communication line of the unit is not connected.

� The communication line is not through.

� The communication line of the unit is not connected correctly.

� The two ends of communication line are not mounted with

magnetic ring.

� The outdoor unit is not electrically powered.

Auto resume


25

2 FLOW CHART OF TROUBLESHOOTING

(1)Comp High-pressure Protection E1

Comp High-pressure Protection E1

Check if the water in the tank is enough

Check if the installation of tank temp sensor is correct

Check if the thermal expansion valve can work normally

Install rightly the tank temp sensor

NO

YES

NO

YES

NO

YES

NO

Check if the gas valve and liquid valve are fully open

Fill the tank with the water

Fully open the valve

Replace the thermal expansion valve

(2)Comp Low- pressure Protection E3


26

（3）Comp Discharge Temp Protection E4


27

(4) Comp Overload Protection E5


28

(5)Fan 1 Overload Protection E8

(6)Fan 2 Overload Protection b8


29

(7) Temperature Sensor Error F3, F5, F7

(8) Communication Malfunction EC


30

Communication Malfunction EC

Check if the communicationline of the unit is connected

Measure if the Communication line is through

Check if the outdoor unitis electrically powered

Replace the communication line

NO

YES

NO

YES

NO

YES

NO

Check if the communication line of the unit is connected correctly

Check the orientationof plug and socket

Check the orientationof plug and socket

Please supply powerto the outdoor unit


31

3 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS

Disassembly and Assembly of external casing

Remark：Please first cut off the power and drain let the Freon out of the unit

Operation Procedure Illustration

(1) Remove the front case

1) Remove the panel

·Loosen the two tapping screws fixing

the front grill.

·Pull down and remove the front grill.

（See Fig. 2）

2) Remove the cover.

· Loosen the two tapping screws fixing

the cover. Remove the cover（See Fig.

Fig. 1

Fig. 2

Fig. 3


32

3）Remove the front plate.

· Loosen the two tapping screws

fixing the front plate. Remove the

front plate.（See Fig. 5）

4）Remove the grill

· Loosen the two tapping screws

fixing the grill. Remove the grill.

（See Fig. 6）

grill

Fig. 4

Fig. 5

Fig. 6


33

(2) Remove the axial fan

· Loosen the ball nuts fixing the axial

fan and remove the washer.（See Fig.

7）

·Pull outward to remove the impeller.

（See Fig. 7）

(3) Remove the motor

· Loosen the screws fixing the motor

support. Remove the motor support.

（See Fig .8 & Fig.9）

Ball Nut

Fig. 7

Motor support

Fig. 8

Fig. 9


34

· Loosen the two screws fixing the

motor. Pull backward and remove the

motor.（See Fig .10）

·Loosen the wire of motor, and pull it

through the hole.

(4) Remove the 4-way valve

Remove the 4-way valve

·Loosen the screws fixing the coil of

4-way valve。

·Remove the coil of 4-way valve。

·Welding out the tubes connected to the

4-way valve.

·Remove the 4-way valve.（See Fig.11）

Note：When welding, the valve should

be covered by wet cloth in order

to avoid the high temp. hurt。

Fig. 10

Fig. 11

(5) Remove electric box

· Loosen the screws fixing the box


35

cover. Remove all pressure

switches and temp. sensor.（See

Fig.12）

(6)Remove compressor and

gas-liquid separator

· Remove the connection wire of

compressor。（See Fig.13）

· welding out the suction pipe and

discharge pipe.（See Fig.13）

·Loosen the bolts fixing the compressor

and Remove the compressor and

gas-liquid separator.

Fig.12

Compressor Gas-liquid separator

Fig.13

(7)Remove gas and liquid

valve


36

1. Remove gas valve

·Loosen the bolts fixing the gas valve.

·welding out the pipe connected to the gas

valve (See Fig.14）.

Note：When welding, the valve should be

covered by wet cloth in order to avoid the

high temp hurt.

2. Remove liquid valve

· Loosen the bolts fixing the liquid

valve.

·welding out the pipe connected to the

liquid valve (See Fig.15）.

Note：When welding, the valve should be

covered by wet cloth in order to avoid the

high temp hurt.

Bolts Gas valve

Fig.14

Bolts Liquid valve

Fig.15


37

4 EXPLODED VIEWS AND PART LIST

4.1 Single Fan

Exploded Views:

No. Name of part Part code Quantity

1 Valve Support Sub-Assy 01715001 1

2 Compressor Support Sub-Assy 01802222 1

3 Chassis Sub-Assy 01282235 1

4 Wooden Package Base 501154042 1

5 Compressor and Fittings 00205208 1

6 Cabinet 01435103 1

7 Front Grill 22265401 1

8 Condenser Inlet Pipe 04655706 1

9 Fan Motor 150154011 1

10 Axial Flow Fan 10335401 1

11 Motor Support Sub-Assy 01705402 1

12 Top Cover 01255402 1

13 Electric Box Sub-Assy 01392129 1

14 Clapboard Assy 01242214 1

15 Condenser Assy 01122216 1

16 4-way Valve Sub-Assy 04142216 1

17 Inhalation Tube Sub-Assy 04672240 1


38

18 Cut-off Valve Sub-Assy 07332217 1

19 Gas-liquid Separator Assy 07255403 1

20 Bidirection Accumulator 07228741 1

21 Inflate Valve Sub-Assy 07332218 1

22 Rear Grill 01475401 1

23 Front Side Plate Sub-Assy 01312232 1

24 Rear Side Plate Sub-Assy 01305402 1

25 Capacitor CBB61 33010013 1

26 Main Board 30221602 1

27 Terminal Board 42011043 1

28 Terminal Board 42011103 2

29 Capacitor CBB65 3300002232 1

30 Transformer 43110240 1

31 AC Contactor 44010226 1

4.2 Double Fan

Exploded views:

No. Name of part Part code Quantity

1 Rear Side Plate Sub-Assy 01312815P 1

2 Valve Support Sub-Assy 01715001 1

3 4-way Valve Sub-Assy 04142815 1

4 Inflate Valve Sub-Assy 07332818 1


39

5 Accumulator 07422204 1

6 Chassis Sub-Assy 01192813P 1

7 Liquid Valve Sub-Assy 07302803 1

8 Compressor and Fittings 00205205 1

9 Front Side Plate Sub-Assy 01305430 1

10 Handle 26235253 3

11 Axial Flow Fan 10338731 1

12 Fan Motor 150154513 1

13 Motor Support Sub-Assy 01705471 1

14 Front Grill 22414102 1

15 Cabinet 01435436 1

16 Top Cover 01255262 1

17 Condenser Assy 01122808 1

18 Inhalation Tube Sub-Assy 04672820 1

19 Electric Box Assy 01393734 1

20 Upper Insulation Plate Sub-Assy 01242802 1

21 Gas-liquid Separator Sub-Assy 07225018 1

22 Lower Insulation Plate 01242804 1

Documents

Service manual compleet KFRS 9