Biofuge Fresco 100V-120V Green English

7/23/2019 Biofuge Fresco 100V-120V Green English

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Biofuge SERVICEMANUAL100/120V Cat. No. 12005522


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Edition: 01

17.11.02 MH

TABLE OF CONTENTS

Section Title Page

1 OPERATING INSTRUCTIONS (not part of this manual)

BROSHURE

2 SERVICE

2.1 Servicing Schedule 2-1/2

2.2 Trouble Shooting 2-3/5

2.3 Test Points 2-6

2.4 Mounting and adjustment of the torsion spring 2-7

2.5 Assembly and adjustment of the drive 2-8

2.6 Cleaning of Instrument Parts 2-8

2.7 Electrical Safety Check 2-9

3 FUNCTIONAL DESCRIPTION3.1 Block Functions 3-1

3.2 Main Board Functions 3-1/3

3.3 Key and Indication Board 3-4

4 DIAGRAMS

For units with 120V mains voltage

4.1 Block Diagram 4-1

4.2 Wiring Diagrams 4-2/3

4.3 Wiring Connection Diagrams 4-4/6

For units with 100V mains voltage

4.4 Block Diagram 4-74.5 Wiring Diagrams 4-8/9

4.6 Wiring Connection Diagrams 4-10/12

For units with 100V or 120V mains voltage

4.7 Main Board, Component Plan, Wiring Diagram 4-13/19

5 DISASSEMBLY OF INSTRUMENT PARTS

5.1 Housing / Casing Parts 5-1

5.2 Sealing Elements 5-2

5.3 Mechanical Components 5-3

5.4 Electrical Components 5-4/5

5.5 Drive Components 5-6

5.6 Components of Cooling Plant 5-7/8

6 SPARE PART FIGURES AND LISTS

6.1 Break down drawings 6-1/3

6.2 Mounting and adjustment of the torsion spring 6-4

6.3 Mounting of the temperature sensor 6-5/6

6.4 Spare Part Lists

7 CALIBRATION PROCEDURE

8 TECHNICAL BULLETINS


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MICROLITRE CENTRIFUGES

HERAEUS BIOFUGE PICO AND BIOFUGE FRESCO

MICROLITRE CENTRIFUGES

HERAEUS BIOFUGE PICO AND BIOFUGE FRESCO

Compact, fast and quiet


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The microlitre centrifuges

in the Biofuge family

are specially made to handle

biological separation tasks.

Whether non-refrigerated

(Biofuge pico) or

refrigerated (Biofuge fresco),

these centrifuges areindispensable in the modern

biological laboratory.

Heraeus centrifuges meet

all current European

Community guidelines and

are CE labelled.

Typical Applications

q Pelleting DNA and RNA

q Pelleting of PCR amplified

nucleic acids

qAntibody and protein

precipitates

q Enzymatic tests

q Removing cell debris fromcell homogenates

q Bacterial and yeast cell

fractionation

Biofuge pico

q Incredibly small microlitre

centrifuge

q Short braking and

acceleration times

q Ergonomic design

q Max. capacity:

24 x 1.5/2 ml or

4 PCR-strips or

32 individual PCR-tubesq Max. speed: 13,000 rpm

q Max. RCF: 16,060 x g

qAerosol tight Easy-Twist-On lid

Biofuge fresco

qThe smallest refrigerated

centrifuge for microlitre tubes

q Ultra-quiet standstill cooling

q Powerful CFC-free

refrigeration unitq Max. capacity:

24 x 1.5/2 ml or

4 PCR-strips or

32 individual PCR-tubes

q Max. speed: 13,000 rpm

q Max. RCF: 16,060 x g

qAerosol tight Easy-Twist-On lid


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ROTORS AND ACCESSORIES

FOR BIOFUGE PICO AND FRESCO

BIOFUGE PICO AND FRESCO

High performance

The brushless induction motor

runs quietly. In 15 seconds

or less, the rotor accelerates

to 16,000 x g, which is

sufficient for all standard

applications. A quick run key

is used for short processingruns.

The high-powered refrigeration

unit of the Biofuge fresco

with stand by cooling ensures

temperatures beneath 0 C

even at maximum speed.

Ergonomic design

The smooth design of the

casing and the modern

keypad control are easy-to-

clean. The straightforward

arrangement of the keys,

with icon labels and the

EASYcontrol microprocessorcontroller, make it simple

to operate.

One-touch lid opening allows

for easy access to the rotor.

BIOFUGE PICO AND FRESCO

Compact design

Create space in your labora-

tory. Take advantage of the

23 x 33 cm footprint of the

small Biofuge pico, which can

be integrated into any work-

place. The minimum height of

the pico casing makes it easierto load the rotor.

The refrigerated Biofuge fresco,

with a footprint of 29 x 45 cm,

is scarcely larger than many

non-refrigerated centrifuges.

ROTORS AND ACCESSORIES

FOR BIOFUGE PICO AND FRESCO

MIKROLITRE ROTOR INCL. EASY-TWIST-ON AEROSOL TIGHT LID ORDER NO. 75003328

Biofuge pico Biofuge fresco

Max. capacity ml 24 x 1.5/2.0 24 x 1.5/2.0

Max. speed rpm 13,000 13,000

Max. RCF x g 16,060 16,060

Acceleration time s 15 15

Braking time s 12 16

Max. radius cm 8.5 8.5

Reducer sleeves Order numbers

24 reducer sleeves for 0.6/0.5 ml microtubes 76003758


24 reducer sleeves for 0.2 ml microtubes 76003750

PCR-ROTOR INCL. EASY-TWIST-ON AEROSOL TIGHT LID ORDER NO. 75003327


Max. capacity 4 PCR-strips or 4 x 8 PCR-strips or

32 individual 0.2 ml PCR-tubes 32 individual 0.2 ml PCR-tubes

Max. speed rpm 13,000 13,000

Max. RFC x g 12,846 12,846

Acceleration time s 15 12

Braking time s 15 16

Max. radius cm 6.8 6.8

Optional features include adapter

sets enabling centrifugation

of all commercially available micro-

litre tubes, from 0.6 ml to 0.2 ml

PCR-tubes.

With this additional rotor you can

easily spin smaller sample volumes

especially 4 PCR-strips(8 tubes each) or 32 individual

PCR-tubes.

Both centrifuges are equipped with a 24-place microlitre rotor suitable for 1.5 or 2 ml tubes and optimised

for applications in the biological sciences. The polypropylene plastic rotor can be autoclaved and offers extensive

chemical resistance. The Easy-Twist-On aerosol tight lid (included) offers exceptional comfort and safety.


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Zp

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TECHNICAL DATATECHNICAL DATA


Designation Microlitre centrifuge Refrigerated microlitre centrifuge

Max. RCF 16,060 x g 16,060 x g

Max. speed 13,000 rpm adjustable in 100 rpm increments 13,000 rpm adjustable in 100 rpm increments

Min. speed 2,000 rpm 2,000 rpm

Control Microprocessor-control led v ia EASYcontrol Microprocessor-controlled via EASYcontrol

Drive Frequency-controlled induction drive Frequency-controlled induction drive

Acceleration/delay

Noise level at max. speed < 55 db (A) < 55 db (A)

standstill cooling < 45 db (A)

Run time 1 99 min, continuous operation, quick run 1 99 min, continuous operation, quick run

Program memory The most recently entered data remains in the memory. The most recently entered data remains

in the memory.

Construction Galvanised steel chassis with Plastic casing with galvanised steel chassis

surface-mounted plastic casing and sheet steel lid, stainless steel rotor bowl

Safety features Lid locks and interlocks Lid locks and interlocks

Temperature range 9 bis +40 C

Min. temp. at max. speed 0 C (ambient temp. = 25 )

Dimensions (HxWxD) 206 x 233 x 335 mm 305 x 290 x 450 mm

8.1 x 9.2 x 13.2 inch 12.0 x 11.4 x 17.7 inch

Weight (without rotor) 9.7 kg 27 kg

21.3 lbs 59.4 lbs

Power consumption 150 W 270 W

Standards Manufactured and tested in conformity with EN 61 010-1, EN 61 010-2-020, EN 50 081-1, EN 50 082-1

Not subject to testing in accordance with UVV VBG 7z

Refrigerant R 134 a (CFC-free)

Asia Pacific Kendro Laboratory Products (H.K.) Limited Hong Kong Tel. +852 2711 3910 Fax +852 2711 3858 [email protected]

Europe, Middle East, Africa

Kendro Laboratory Products International Sales Hanau Germany Tel. +49 (0) 1805- 536 376 Fax +49 (0) 1805-112 114 [email protected]

Latin America Kendro Laboratory Products International Sales Newtown, CT USA Tel. +1 203- 270 2080 Fax +1 203- 270 2210 [email protected]

North America Kendro Laboratory Products Newtown, CT USA Tel. +1 800- 522 7746 Fax +1 203- 270 2166 [email protected]

Internet http://www.kendro.com

Quality Products Lifetime Care

Registered to ISO 9001. Kendro Laboratory Products meet or exceed stringent quality and product safety standards. 2002 Kendro Laboratory Products. All Rights Rese rved.

Printed in Germany 2C 09/02 4t Druckerei

For Ordering or Technical Information

Your Sales Contact

ORDER NUMBERS 230 V/5060 Hz 110120 V/60 Hz

Biofuge pico incl. 24-place microlitre rotor 75003328 75003235 75003236

with Easy-Twist-On aerosol tight lid

Biofuge fresco incl. 24-place microlitre rotor 75003328 75005521 75005522

with Easy-Twist-On aerosol tight lid


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Benchmarks for

Size and Value.

Pico and Fresco

MicrocentrifugesSORVALL


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Small footprints,BIG value

Kendro Laboratory Products SORVALL Pico

and Fresco are the smallest, quietest and quickest

microcentrifuges going around. Their sleek,

lightweight designs maximize your available bench

space, and deliver all the performance you will ever

need, year in and year out, for a host of separation

tasks in the microliter sample range.

Typical applications

Pelleting DNA and RNA

Pelleting of PCR-amplified nucleic acids

Antibody and protein precipitates

Enzymatic tests

Removing cell debris from cell homogenates Bacterial and yeast cell fractionation

SORVALL Pico

Compact 9" x 13" (233 mm x 335 mm) footprint

13,000 rpm (16,060 xg)

Short braking and acceleration times

High capacity 24 x 1.5/2.0 ml biocontainment rotor NEW PCR strip rotor

NEW Easy-Twist-On biocontainment lid

Microprocessor-based keypad control Whisper-quiet, maintenance free brushless drive

SORVALL Fresco

The smallest refrigerated centrifuge available

13,000 rpm (16,060 xg)

11" x 18" (290 mm x 450 mm) footprint

High capacity 24 x 1.5/2.0 ml biocontainment rotor NEW PCR strip rotor

NEW Easy-Twist-On biocontainment lid

Ultra-quiet standstill cooling Precise temperature control from -9C to 40C

Whisper-quiet, maintenance free brushless drive


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Choice of rotors

Microliter and PCR strip rotors for the SORVALL Pico and Frescoare equipped with biocontainment lids for use with infectious or

hazardous samples. The aerosol-tight, Easy-Twist-On lid is

exceptionally easy to use.

Compact designCreate space in your laboratory. Take advantage of the 233 x 335 mm(9 x 13 in) footprint of the little Pico, which can be integrated

into any workplace. The low height of the Pico casing makes it

easier to load the rotor. The refrigerated Fresco, with a footprintof 290 x 450 mm (11 x 18 in), is smaller than many non-refrigerated

centrifuges.

Whisper-quietThe Pico and Fresco are valuable aids in the small biological

laboratory, where noise can be an issue. Their designs take fulladvantage of recent discoveries in aerodynamics, and ensure

whisper-quiet operation even at maximum speed.

High performanceThe brushless induction motors of the Pico and Fresco are extremely

efficient. In 15 seconds or less, they accelerate the microliter rotor toits maximum RCF of 16,000 xg, which is sufficient for all standardapplications. A quick run key is used for short processing runs.

Stylish, ergonomic designThe smooth design of the casing and the modern keypadcontroller are both easy to clean and pleasing to the eye.

The straightforward arrangement of the keys, with icon labels

and the EASYcontrol microprocessor controller, make operationstraightforward. One-touch lid opening allows easy access to the

rotor chamber.

Ecological refrigerationThe refrigerated Fresco uses a CFC-free refrigerant.

The powerful refrigeration unit, with standstill cooling, can maintainconstant temperatures below 0C even at maximum speed.

Microliter rotor: adapter sets enable

centrifugation of all commercially

available microliter and PCR tubes.

PCR strip rotor: spin 4 PCR strips

(8 tubes each) or 32 individual PCR tubes.

Rotors and accessories for the Pico and Fresco

Microliter rotor 75003328 with Easy-Twist-On biocontainment lid

Pico FrescoMax. capacity (ml) 24 x 1.5/2.0 24 x 1.5/2.0

Max. speed (rpm) 13,000 13,000

Max. RCF (xg) 16,060 16,060

Acceleration time (s) 15 15

Braking time (s) 12 16

Max. radius (mm) 85 85

PCR strip rotor 75003327 with Easy-Twist-On biocontainment lidPico Fresco

Max. capacity (4) PCR strips or (4) PCR strips or

(32) 0.2 ml PCR tubes (32) 0.2 ml PCR tubes

Max. speed (rpm) 13,000 13,000

Max. RCF (xg) 12,846 12,846

Acceleration time (s) 15 12

Braking time (s) 15 16

Max. radius (mm) 68 68

Reducer sleeves Catalog number



24 reducer sleeves for 0.2 ml microtubes 76003750

Compactmicrocentrifugesfor Life Science

NEW


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SORVALL Pico SORVALL Fresco

Max. RCF (x g) 16,060 16,060

Max. speed (rpm) 13,000 adjustable in 100 rpm increments 13,000 adjustable in 100 rpm increments

Min. speed (rpm) 2,000 2,000

Control Microprocessor-controlled via EASYcontrol Microprocessor-controlled via EASYcontrol

Drive Frequency-controlled brushless induction drive Frequency-controlled brushless induction drive

Noise level at max. speed < 55 dB (A) < 55 dB (A)

standstill cooling < 45 dB (A)Run time 1 - 99 min, continuous operation, quick run 1 - 99 min, continuous operation, quick run

Program memory The most recently entered data remains in the memory The most recently entered data remains in the memory

Safety features Lid locks and interlocks Lid locks and interlocks

Temperature range - -9 to +40C

Min. temp. at max. speed - 0C (at room temp. = 25C)

Dimensions (H x W x D) 8.1 x 9.2 x 13.2 in (206 x 233 x 335 mm) 12.0 x 11.4 x 17.7 in (305 x 290 x 450 mm)

Weight (without rotor) 21.3 lb (9.7 kg) 59.4 lb (27 kg)

Power consumption 150 W 270 W

Specifications

110-120 V/60 Hz 230 V/50-60 Hz

SORVALL Pico includes 24-place microliter rotor 75003328 75003236 75003235

with Easy-Twist-On biocontainment lid

SORVALL Fresco includes 24-place microliter rotor 75003328 75005522 75005521

with Easy-Twist-On biocontainment lid

Catalog Numbers

Australia Kendro Laboratory Products Sydney NSW 2066 Tel. +61 (2) 9936 1540 Fax +61 (2) 9427 9765 [email protected]

Austria Kendro Laboratory Products GmbH Vienna Tel. +43 (1) 801 40-0 Fax +43 (1) 801 40 40 [email protected]

Canada Kendro Laboratory Products International Sales Newtown USA Tel. 1 (203) 270-2080 Fax 1 (203) 270-2166 [email protected]

China Kendro Laboratory Products Beijing Rep. Office Beijing Tel. +86 (10) 6501-3810 Fax +86 (10) 6501-4229 [email protected]

Kendro Laboratory Products (H.K.) Limited Hong Kong Tel. +852 2711-3910 Fax +852 2711-3858 [email protected]

Kendro Laboratory Products Shanghai Rep. Office Shanghai Tel. +86 (21) 5490 0216 Fax +86 (21) 5490 0230 [email protected]

Denmark Axeb AB Albertslund Tel.+45-43 62 46 47 Fax +45-43 62 46 41 [email protected]

France Kendro Laboratory Products Courtaboeuf cedex Tel.+33 (1) 69 18 77 77 Fax+33 (1) 60 92 00 34 [email protected]

Germany Kendro Laboratory Products GmbH Hanau Tel +49 (1805) 536 376 Fax +49 (1805) 112 114 [email protected]

India Kendro Laboratory Products (India) Pvt. Ltd. New Delhi Tel. +91 (11) 618 48 40 Fax +91 (11) 618 53 97 [email protected]

Italy AHSI S.p.A. Cornate DAdda Tel. +39 (039) 68 27-1 Fax +39 (039) 68 27-500 [email protected]

Japan Nippon Kendro Co. Ltd. Tokyo Tel. +81 (0) 3 3517-1661 Fax +81 (0) 3 3517-1664

New Zealand Kendro Instruments New Zealand Auckland Tel. +64 (0) 9-525 03 33 Fax +64 (0) 9-525 03 37 [email protected]

Poland Kendro Splka z.o.o. Warsaw Tel. +48 (22) 663 43 23 Fax +48 (22) 663 43 25 [email protected]

Portugal Heraeus S.A. Cacem Tel. +351 (1) 912 08 65 Fax +351 (1) 912 08 60 [email protected]

Spain Heraeus S.A. Madrid Tel. +34 (91) 358 19 96 Fax +34 (91) 358 20 67 [email protected]

Sweden Axeb AB Sollentuna Tel. +46 (8) 585 777 50 Fax +46 (8) 623 15 45 [email protected]

Switzerland Kendro Laboratory Products AG Zurich Tel. +41 (1) 454 12 12 Fax +41 (1) 454 12 99 [email protected]

Kendro Laboratory Products SA Carouge-Genve Tel. +41 (22) 343 21 67 Fax +41 (22) 342 38 31 [email protected]

U.K./Ireland Kendro Laboratory Products Ltd. Bishops Stortford Herts Tel. +44 (1279) 827700 Fax +44 (1279) 827750 [email protected]

USA Kendro Laboratory Products Newtown, CT Tel. +1 (800) 522-7746 Fax +1 (203) 270-2166 [email protected]

All other countries in

Asia Pacific Kendro Laboratory Products Newtown, CT USA Tel. +1 (203) 270-2080 Fax +1 (203) 270-2210 [email protected]

Europe, Middle East, Africa

Kendro Laboratory Products International Sales Hanau Germany Tel. +49 (1805) 536 376 Fax +49 (1805) 112 114 [email protected]

Latin America Kendro Laboratory Products International Sales Newtown, CT USA Tel. +1 (203) 270-2080 Fax +1 (203) 270-2210 [email protected]

Internet http://www.kendro.com

Quality Products Lifetime Care

Registered to ISO 9001. Kendro Laboratory Products meet or exceed stringent quality and product safety standards Printed in U.S.A. (11/02) S00239

2002 Kendro Laboratory Products. All Rights Reserved.

For Ordering or Technical Information

SORVALL


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Maintenance

Edition: 01 2-1 BIOFUGE fresco17.11.02 MH

2 Service

2.1 Servicing Schedule (yearly procedure recommended)2.1.1 Maintenance Routine without Dismantling the Centrifuge2.1.1.1 Electrical Installation and Safety

switch OFF the centrifuge and disconnect the unit from power, check voltage supply and mainsfusing (15 Amps, slow blow characteristic)

check condition of plug and wall socket - (let) replace defective parts

check cord condition and fixing / connection - replace or refit it

check condition of instrument socket and replace it in case of bad contacts2.1.1.2 Location and Mechanical Installation

check the base (ground, table, lorry with lockable wheels etc.) for resonance-free and stableconditions

check for a well ventilated place and sufficient distances to walls or adjacent equipment, withoutexposition to direct sunlight

check the leveling of the centrifuge drive with use of a spirit level2.1.1.3 Lid Locking Mechanism and Safety Device

connect the centrifuge to power and switch ON

check for easy lid closing and self-acting lid opening - if in disorder, readjust lid's swivel hingeand/or torsion spring

check the central rubber gasket for lid sealing and replace it, if damaged for checking of the safety circuit: start the centrifuge let it shortly run and stop it, the lid must not be

opened as long as the message "end" will be indicated - if safety circuit is out of function, replacemain board

2.1.1.4 Cleanliness of Spin Chamber and Motor Casing

open the lid and remove the rotor (for loosening turn socket wrench in arrow direction - see rim ofrotor chamber, push 2 screw drivers in opposite holes and pull the rotor vertically out)

clean the spin chamber with a dry and absorbent cloth (remove all dust and moisture - see alsosection for Cleaning)

check the correct seat and condition of the motor cover and take care of the cleanliness of the

annular slot around the motor shaft: penetrating fluids can damage the upper motor bearing ,remove fluids with an injector and/or absorbent paper

2.1.1.5 Rotor and Accessories Condition and Sealing

check the condition of rotor and accessory parts (especially all supporting or stressed partitions):the rotor and/or accessory parts must not be used any longer, if there are visible traces ofmechanical damage or rust

check the condition of rotor and/or accessory sealing and replace them in case of malfunction

2.1.1.6 Rotor and Accessories Condition and Sealing

check the condition of rotor and accessory parts (especially all supporting or stressed partitions):the rotor and/or accessory parts must not be used any longer, if there are visible traces ofmechanical damage or rust

check the condition of rotor and/or accessory sealing and replace them in case of malfunction2.1.1.6 Rotor Fixing and Motor Shaft

check the trouble-free condition of the locking nut and replace it in case of malfunction

check the condition of the drive motor shaft: the centrifuge must not be used any longer, if the driveshaft is damaged (bend, thread is worn out, etc.)

2.1.1.7 Temperature Control Circuit

clean the condenser with a dust exhauster

check the thermal isolated fixing and the correct place of the temperature sensor

reinstall the rotor and run the centrifuge at maximum rotor speed and at 4C, check thetemperature 15 minutes later: the displayed and measured value should be approximately thesame (allowed tolerances 2)


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Maintenance


2.1.2 Maintenance Routine after Dismantling the Centrifuge Casing2.1.2.1 Motor Supporting Elements

check the supporting and damping motor elements and replace them in case of increased rubberabrasion or abundance of imbalance but at least every 3 years

2.1.2.2 Braking Circuit

check the function of the braking circuit (warming up of brake resistor, even and noiseless brakeeffect) and replace defective parts in case of malfunction

2.1.2.3 Ventilation and proper Air Flow

check the sucking performance of the fans (a piece of paper must be sucked on), if necessaryclean or replace defective fan

check the air path and lateral sealing: no air must be redrawn from inside, if necessary replace thelateral insulation

2.1.2.4 Lead and Screwing Connections

check the terminal and plug connections of all leads and on all boards and electrical components,tighten all loosen screwing connections, refit or replace defective parts

check the screwing connections of all boards, mechanical and electrical components and re-tighten them if necessary (use screw locking lacquer for motor mounts and lid lock assembly)

2.1.2.5 Protection Earth Core and Grounding Connections

check the protection earth core for continuity and all grounding plug connectors

check isolation resistance and accessible current


13/70

Maintenance


2.2 Trouble Shooting

Error

IndicationError Cause

Possible Error

SourceCorrective Procedure

mains fuse or circuitbreaker failed

check fuse or circuit breaker and replace or switch onagain

defective mains cord,socket or mains

switch

check leads, socket and mains switch, replacedefective parts

no mainsvoltage supply

unit fuse or fuses onmain board defective

Replace the fuse, if fuse blows up again, search forother faults

faulty connectionfrom main board to

key board

check connections on main and key board, checkconnecting leads, replace faulty parts

no low voltagesupply for

indication board faulty indication ormain board

replace main board completely

displays

remain

dark

interruptedprogram

NV-RAM out ofsocket or not

correctly placed

insert the valid NV-RAM and push it correctly intosocket

reduced voltagesupply (


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Maintenance


Trouble Shooting

Error


Possible Error


Lid was openedmanually during

run

Forbidden!Lid opening device

must only be used atstandstill

close lid immediately, turn power OFF/ON, wait fortermination of br phase until end message appears

check leads and connectors to micro switch, in caseof a faulty micro switch, replace lid lock device

completely

Defective microswitch or leads or

connectors to microswitch areinterrupted

let motor cool down, then check temperature switchand leads with Ohmmeter

check air cooling, circulation

LIdmessage

appears inspeeddisplay

protection circuit(15V) for lid and

motortemperaturecontrol wasinterruptedduring run

Motor over-temperature switch

has tripped (nosufficient air flow ormotor has run on 2

phases only)

check solderless connections XM1-3 and motorwindings, replace defective parts

micro switch check leads and micro switchOPEn

message indisplay

15V supplycircuit is

interrupted atstandstill

motor over-temperature switch

check motor over-temp. switch and leads forcontinuity, replace faulty parts

short interruption ofmains supply

Wait for rotor standstill (approx. 75 sec) and re-startbrmessage

appears inspeeddisplay

rotor comes tostandstill

without brakingforce

bad contact ofinstrument supply

line

Check plug contacts of supply line and replacedefective parts if necessary

rotor is jammedcheck for easy movement, remove any jamming

objectsrotor didn't turnmotor is jammed remove drive, replace faulty parts

connection: drivemain board

check terminal and lead connections, replace faultyparts

defective drive check resistance of motor windings, replace faultyparts

E-00flashes

motor didn't start

faulty main board replace main board

faulty temperaturesensor (PT100) or

leads

check plug connection and resistance of PT 100,replace faulty sensor

E-04flashes

faultytemperaturemeasuringtest: PT100

substitution byresistors,

indication afterpower ON

defective amplifier orconverter

set the temperature to 20C and watch the display:

100W (02)C

120W (502)Cif not replace the main board

compressor didn't

work

check leads and voltage supply on main board and

compressor, replace defective parts

chamber over

temperatureindication value

>50C loss of refrigerantsearch for leakage, evacuate and refill with newrefrigerant

E-04flashes

chamber undertemperature

indication


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Maintenance


Trouble Shooting

Error


Possible Error


E-10flashes

checksum errorof NV-RAM

NV-RAM wrong or notinitialised

insert the correct NV-RAM

sporadic: strongelectromagnetic

disturbance

if error returned very often screen the disturbancesource or operate the centrifuge on another place

E-11flashes

error during dataexchange from

NV-RAM continuously: erroron main board

replace defective main board

sporadic: strongelectromagnetic

disturbance

if error returned very often screen the disturbancesource or operate the centrifuge on another placeE-23

flashes

too muchtolerances during

temperature

calibrationcontinuously: error

on main board replace defective main board


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Maintenance


2.3 Test Points

Test Points Unit Value Conditions

mains terminal XN 120V ACall given values are related on 120V (10%) mains voltage for boards

supply

terminal XMmotor voltage -

values must bethe same betweenall 3 motor leads

(U,V,W)

115V AC155V AC210V AC

in each case measured inter 2 motor leads after reaching selected speed -

no effective values!

3000min-1 , rotor #3327, #33286000min

-1

13000min-1

acc. time: 15s, dec. time: 17s

motor current IMcable (U,V,W)

3 * 0,6A

soft iron or digital effective measuring meter(true RMS)Max. during acceleration (#3327, #3328)rotor #3327, #3328speed = 13000min

-1

320V DC350V DC

at standstillmax. during braking phase Bremsens (#3327, #3328)

305V DCrotor #3327, #3328speed = 13000min

-1

intermediate

voltage UDinterU+ (cathode

D4) and U- (anode

D5) 275V DC shortly at maximum acceleration (#3327, #3328)

25mV DC40mV DC65mV DC

3000min-1

, Rotor #3327, #33286000min

-1

13000min-1

current ID ofintermediate

circuit, (measuredas voltage dropacross control

resistorR100)

UM = ID * RM

180mV DC

-45mV DCshortly at maximum acceleration (#3327, #3328)shortly at maximum braking (#3327, #3328)

motor windingresistance 20C

3 x 14W

-insulation value > 10MW

switch OFF unit, pull off motor plugs, measure inter 1 -> 2, 2 -> 3, 3 -> 1resistance inter each phase and motor casing

brake resistorR24 parallel R101

235W resistor temperature: 20C

compressor

terminal XGterminal box

pull off startingrelay

-insulation

3,6W

5,5W

10,4W

0,3W

> 10MW

compressor temperature 20Cresistancemain coil (between terminal 13 + 14)auxiliary coil (between terminal 12 + 13)coil starting relayinter phase and compressor casing

fan motor

terminal XK150W

resistancedisconnect one pole of terminal XK

fan temperature20C

lid solenoid

terminal XC20W resistance , not activated

lid switches

plug XA15V DC voltage drop by open lid

Over temperatureswitch Motor

terminal XB15V DC voltage drop by closed lid and disconnect one pole of terminal XB

Temp. Sensor

plug XU 95mV

voltage drop

chamber temperature 20C (PT100: 108W)


17/70

Maintenance


2.4 Mounting and adjustment of the torsion spring

2.4.1 PurposeThe torsion spring offers the user a comfortable support when closing and opening the centrifuge lid.When the "open lid" key is pressed, the lid lock is released on both sides and the lid bursts open andremains in a 20 position. Up to an angle of 45 the lid remains stable in any chosen position, beyond45 it automatically opens to full extent.

2.4.2 MountingThe torsion spring assembly contains the following parts:

torsion spring

2 plain bearing bushes (for shaft guidance)

2 bushing nipples (for leg catch)

2 set screws (aid for fixing legs)

dowel pin (for hooking the torsion spring onto the shaft)

tube of Loctite 221 (for fastening screws)

tube of Molykote TP42 (for lubrication of the torsion spring)

Preparation:The defective torsion spring has been removed as described in Section 5, the old plain bearing bushes

and bushing nipples have been removed.1. Press the new plain bearing bush from outside into the right-hand bore of the chassis.2. Slip on both bushing nipples up to the head of the hexagon bolt M6x12. Fix the screws again to the

chassis and secure with Loctite 221.3. Push the old dowel pin carefully from the shaft using a pin punch, then push the new dowel pin on

using a plane surface (e.g. a wooden panel).

Mounting the shaft and torsion spring:4. Grease the short end of the shaft evenly using about 5 g of Molykote TP42.

Attention! Do not cover the plain bearing with grease!5. Slip the torsion spring onto the short end of the shaft (short loop first).6. Push the long end of the shaft through the left-hand bore of the chassis and slip into right-hand

plain bearing bush.

7. Press the plain bearing bush via the shaft into the left-hand bore of the chassis.

2.4.3 AdjustmentPreassembly and alignment of the legs:8. Push both legs onto the ends of the shaft such that the bores are horizontally oriented and the leg

ends point forward.9. Screw the M8 nuts loosely onto each of the shaft ends to position the legs.

10. Screw one dowel pin each tightly into the rear threaded bores, thereby fixing them with the bore inthe chassis.

Stretching the torsion spring:11. Push a suitable screwdriver from behind into the left-hand bore of the shaft and turn totally to the

front. Grip the shaft via the middle bore with another screwdriver and turn it to approximately 15from horizontal.

12. Tighten fast both nuts of the shaft.

2.4.4 Assembling lid and housing13. Put lid in place. It must catch audibly into both locks.14. Screw on front cap screws on both sides, thereby fastening the lid tightly to the two legs.15. Replace one by one the two set screws in the rear bores by the remaining two cap screws.16. Manually release the locks. The lid should come to rest at an angle of 15-30. If this is not the

case, restretch using the middle bore of the shaft. Should this be impossible, the lid must bedisassembled and the spring must be stretched anew!

17. If the angle is okay, secure the M8 nuts with one drop of Loctite each on the legs.

18. Close the lid and replace the rear cap screws on both sides by set screws. Attention! Set screwsmust not jut out of the legs!


18/70

Maintenance


19. Screw lid off and mount housing.20. Reassemble lid as described above and check opening angle of 15-30.

2.5 Assembly and Adjustment of the Drive2.5.1 Purpose of the adjustmentThe temperature measurement of the Biofuge fresco is done using a slim temperature probe. The tip

of this temperature probe is fixed at a very short distance to the motor cover as well as to the rotor. Inorder to guarantee an accurate temperature measurement, a defined distance to both rotor and motorcover is mandatory! For this purpose, the drive must be adjusted.

2.5.2 Mounting / Adjustment of the drive with help of the rotor #3327/3328Fasten rubber buffers to the transverse crosshead using nuts and washers.

Place transverse crosshead inside the chassis and fasten with screws such that the screws arealigned with the upper ends of the long holes.

Connect the motor to the rubber buffers using the screws and locking rings.

Adjusting the transverse crosshead

Put three cylindrical spacers with a thickness of 6,00,1 mm (diameter 10 to 20mm) for rotor#3327/3328 into the evaporator.

Position the rotor onto the motor shaft and fasten with flanged nut.

Loosen the screws about turn and carefully move transverse crosshead downward until the rotorrests on top of the spacers. Attention! Make sure the transverse crosshead is horizontally placed.Besides, the rubber buffers must not be stretched or tilted.

Fasten all 8 screws of the transverse crosshead.

Checking the adjustment

Replace the spacers by three 5,00,1 mm thick spacers (diameter 10 to 20mm) for rotor#3327/3328. Fasten rotor again as prescribed.

Turn rotor manually. The motor is correctly mounted if the rotor does not touch the spacers. If itdoes, the adjustment must be repeated.

Remove spacers and secure screws with a drop of screw lock.

Reinstall centrifuge and rotor as prescribed and do a test run.

2.6 Cleaning of Instrument Parts

ATTENTION - WARNING!

The electrical and electronic components must not be cleaned with moist detergents!For Cleaning the centrifuge housing or its accessories see Operating Instructions section 1(maintenance and care).

Electronic components

Clean dusty components carefully with a dry and soft brush and remove loose dust with avacuum cleaner.

FansScratch off carefully with a knife or similar tool the crusted dirt from the fans blades. Resultinggrooves or marks must be removed subsequently with a fine abrasive cloth. Loose dirt is toremove with an absorbent cloth or vacuum cleaner.

Vent holesRemove dirt from the vent grid behind the front panel by using a brush and vacuum cleaner.

Condensers of cooling plantThe louvers between the condensers heat air deflectors have to be vacuum cleaned. In case ofpersistent dirt the unit must be carried to an appropriate place where the condensers can becleaned with compressed air from inside to outside. Bent heat air deflectors have to be realignedcorrectly.


19/70

Maintenance


2.7 Electrical Safety Check

ATTENTION!

A final electrical safety check must be performed after each maintenance and/or repair!

Resistance check of protective conductorThe measuring value of the resistance between the mains plug's grounding pin and the grounding

conductors of the motor, electronic chassis and the casing must not exceed 200 mW.

Insulation resistance CheckCheck also the insulation resistance between the poles of the mains plug and the grounding

conductor; the resistance value must be more than 2 MW.

Accessible current measured to EN 61 010The accessible current must not exceed 3.5 mAmps in single fault condition (interruptedprotection earth wire)! In accordance with the EN61010, IEC1010 and UL3101 such a faultcondition can be reproduced by the following measuring circuit.

500W1%

L (N)

N (L)

PE

10kW5%

0,022F5%

VAC

0,22F5%

Steckergehuse / plug-in casing

Spezifaktionen fr Megert- TRMS, DC - 5kHz oder mehr- Eingangswiderstand > 1M- Toleranz 5% oder besser- Crest Faktor 5 oder besser

W

Specifaction for the meter- TRMS, DC - 5kHz or more

- Input resistance > 1M- Tolerance 5% or better- Crest Factor 5 or better

W

Krperstrom:accessible current: I [mA] = U [mV] / 500:

U = 1750mV I = 3,5mAmax max


20/70

FUNCTIONAL DESCRIPTION

Edition:01 3-1 Biofuge fresco28.11.02 MH

3 Functional Description

3.1 Block Functions

The BIOFUGE fresco is a microprocessor controlled laboratory tabletop centrifuge with inductiondrive motor and refrigerator. Following boards and components are located inside of the unit (seeblock diagram section 4 page 4-1):

Two poles mains switch is mounted in the bottom of the front panel's right side

Main board with microprocessor part and power electronics, 2 fuses (4AT) are serving for boardprotection

Key and indication board (EASYCONTROL programming with temperature display)

Three phase induction drive motor with an integrated thermal over temperature switch (cut-out at140C)

Temperature sensor PT100

Compressor with starting relay (inside terminal box) and starting capacitor

Two lid lock assemblies with solenoid and integrated micro switches (mechanical bolt keeper,magnetically dislocking)

Brake resistor mounted on main board

Two fans (parallel connected) for cooling of condenser, drive, compressor and electronics

3.2 Main Board Functions

The main board is mounted on the rear side of the front panel. The components on main board arearranged in following groups (see also wiring diagram page 4-2 and 4-3).

Board fusing (2 x 4 Amps. slow blow feature)

Noise Filter for suppression of radio interference, caused by the fast switching power electronics(9,9 kHz), in accordance with the German Regulation VDE 871, grade B

Power pack for low voltage supply of microprocessor part (potential separated by transformer) andpower electronics (mains potential)

Triac control circuit for both parallel connected fans

Triac control circuit for both parallel connected lid solenoids ( DC supply via bridge rectifier)

Triac control circuit for compressor relay

Bridge rectifier for DC intermediate circuit supplying brake control path and frequency converter

Microprocessor part with Controller (central processing unit) and ASIC80 (specific integrated circuitfor controlling of centrifuge functions)


21/70



3.2.1 Power Pack

The power pack consists of a transformer, bridge rectifier and voltage regulator.

U1 = 5 V supplies central processor, key and indication board and temperature measuringcircuitreference potential A1: connected to protective conductor (GND)

Additional generated by one way rectifying from the mains voltage: U2 = 15 V supplies control electronics of frequency converter via the protection circuit of FET

over temperature switch (118C - normal closed), closed lid switch and motor overtemperature switch (normal closed)reference potential:

A2! mains potential! EXERCISE CAUTION when measuring etc.

3.2.2 Intermediate Circuit with Brake Path and Frequency ConverterIntermediate CircuitThe DC intermediate circuit serves as an energy store between the AC power input and thetransmitted motor performance. The intermediate circuit consists of a bridge rectifier (4 diodes) andone reservoir capacitor which is softly charged, continuously supplied during operation and slowlydischarged after power off.

Brake PathElectrical power is fed back into the intermediate circuit during motor deceleration (motor acts asgenerator). This braking power is transformed into heat by two big brake resistors (parallel connected)on board so that the intermediate circuit voltage does not rise to an excessive level (see section 2 -test points on main board). The brake resistors are switched into the intermediate circuit by a fastswitching transistor (pulse width modulation). This transistor is voltage dependant controlled by a self-acting stage (closed loop).

Frequency ConverterThe motor is 3-phased provided with chopped direct voltage blocks. These blocks are variable infrequency and pulse width modulation and are dephased to 120 between the motor windings.Beginning with low frequency and small pulse width chopped blocks, both parameters will beincreased up to the operators set speed. By this variation the acceleration power of the drive motorcan be effected. For deceleration the frequency and pulse width parameters will be reduced. Thefrequency converter is protected against over current, over temperature and over voltage.


22/70



3.2.3 Microcontroller (Central Processing Unit)The controller block includes the central processor unit (CPU) 80C21 PLCC and the data storage (NV-RAM) 9346 with the software identification No's. for:

CPU: 097 8 xx (first displayed No. in speed, time and temperature field)

RAM: 415 8 xx (second displayed No. in speed, time and temperature field)

The second parts of these No.'s (xx displayed in the temperature field) will be upgraded if necessary.The ROM with control program is integrated in the CPU. The most important operating parameters(e.g. the maximum data or the last operator settings) are stored in the non volatile (NV) -RAM.

The CPU co-operates with the ASIC 80 component via the 8 bit data bus and some control lines. TheASIC 80 is a specially designed integrated circuit for the driving of our centrifuges (with inductionmotors), containing additional functions for temperature measuring and electronics protection.


23/70



3.3 Key and Indication BoardThe key and indication board is mounted behind the display. The connection to the main board is doneby a 14 pole flat cable. The 7-segment displays, the control key LED and the operating keys are alsomanaged by the CPU. For the programming serves EASYCONTROL (see Operating InstructionManual).

Function of key elements

keys name function(s)

S1 lid symbol to open the lid (only possible at standstill)

S2 double arrow quick run, to start - keep the key pressed

S3 square symbol stop, to terminate the centrifugal run manually

S4 arrow to right start, to set a centrifugal run in rotation

S5 speed arrow down to decrease the value of the set speed

S6 speed arrow up to increase the value of the set speed

S7 temp. arrow down to decrease the value of the set temperature

S8 temp arrow up to increase the value of the set temperature

S9 time arrow down to decrease the value of the set time

S10 time arrow up to increase the value of the set time

Function of indicating elements

indicat. name function(s)

H01,H02temperature

rangeindication of sample temperature, right part of softwareidentification numbers of CPU and NV-RAM

H03,H04 time rangeindication of centrifugation time and hold (hd),left part of software identification numbers of CPU and NV-RAM

H5 H7 speed range

indication of speed [1000 (min-1

)]

left part of software identification number

run finished (End) error messages like (LId, E- )

H8, H9,H12, H13

rotation-LEDs indication of rotation after starting till End


24/70

SCHEMATIC DIAGRAMSFor units with 120V mains voltage

4 - 1 BIOFUGE fresco

Block Diagram

16.12.02 He

Edition: 01

Y1 Y2

key and indication board

motor

M1

3~

brake resistor

lid solenoid

lid lock left side lid lock right side

lid solenoidlid switch lid switch

F3

overtemp. switch

XA XBXC XM XU

instrument plug

main board

M2

XGXK

XN

fan for compressor, condenser

M3 M4

V1PT100

compressortemp. sensor

mains switch

legend

screwing connection plug connection

XF

XF

S1

CPUNV-RAM

x 1 0 0 01 0 0 0

BIOFUGE

S1S3 S2S4


25/70

4 - 2 BIOFUGE fresco16.12.02 He

Edition: 01 Wiring Diagram


7805

transformer, rectifiers and regulators

F1

XA/1

lid switch

S1..S4

main board

M2

5V (VCC)

XV/1 XV/2

8AT

XA/2XB/1 XB/2 XC/1 XC/2

J

J

Y1

Y2

PTC

NTC

autom. brake control

+15V

DC intermediate circuit0V=A2

A1=GND

driving of FETs (frequency converter)

lid solenoid

CS

fan for condenser

noise filter

compressor with starting relay

XG/1

K1

"E-07"

"E-17"

"E-17"

"E-08"

"E-07"

"E-07"

"E-07" "LId"

14 10

11

13

M3

M2

XL

XN

XPE

3

4

PE chassisPE motor

PE compressorPE condensor fan

1

5

2

R1 220brake resistor

"E-08"

instrument plugwith mains switch

S0

XG/2


26/70


Wiring Diagram

16.12.02 He

Edition: 01


K1(M2)5

U

F

temperature sensorPT100

JV1

"E-7"

1

2

XM/1 XM/2 XM/3

F3

M1

overtemperature switch

Motormotor

3

4

U1 (5V)A1 = GND

U1 (5V)A1

U2 (15V)

A2 R44

frequency converter

P part

key and indication part

EASYCONTROL

main baord part 2

ASIC80

dyndyn

dyn

CPU NV-RAM

physical separation

INHIBIT

RESET

2x6 HGTPs

Y1, Y2

E- 8

"E- 0"

"E- 0"

E- 0

"E-10""E-11"

"LId"

ii

i

15V LId...

"LId"

"OP"

13 8 4

3

XF

H1

H6H8

H9H7

H2H3 H4 H5

XF14

3

S1S2

S4 S3 S8 S7

S6S5

A,BF,E

8

A,B,C,DE,F,G,DP

UD-*

UD+

current control res.

MUX


27/70


Edition: 01 Wiring Connections Diagram


S 1

S 2

toroidial core, Valvo4322 020 97183+ cable tie perform a most narrow winding

as possible!

no. 1 no. 2 no. 3


XA

F1

XM3XM2XM1

XC

PE

XU

XK

XG

XN

drive motor

M 3M 2

Y 1

Y 2

instrument plug

12

45

I 0

heat sink

lid switchesS1 u. S2

lid solenoidsY1 und Y2

fans for condenserM2 und M3

M4compressor

mains switchS 0

M 1

brake resistorR 101

XB1 XB2

motor overtemp. switchXB1 u. XB2

temperature sensor

Y 1

Y 2

S1

S2

1

4

2

14

2

lid lock, right side

lid lock, left side

1

1

4

4

a

a

b

b

a

a

b

b

PE

N L

L

N

PE - motor

PE - compressor

bottom platebottom plate

PE - fan M2 PE - fan M3

mounting mains ground

amored chamber

pass through from inside all leadsmarked by ellipse

lead-in hole for sensor

1

2

1

2

1

2

mounting of unit ground, right side in front mounting of unit ground, left side in front

PE - armored chamber foot, right side in the rear

PE - main board

1x PE - terminal 1 pole1x screw M4x10mm2x fan washer 4,3mm

1x screw M4x25mm1x PE - terminal 3 pole6x fan washer 4,3mm3x nuts M4


1x screw M4x16mm2x fan washer 4,3mm1x nut M4

PE - mains groundPE - armored housing

PE - motor(from motor harness)

main board

S3

S4

4

4

2

2

1

1


28/70




compressor terminal box

startingcapacitor

starting relay

10 11

12 13

14 PE terminal box

PE

+ +

starting capacitorterminal: 11 u. 13

mains - L

mains - N

fans

drive motor wiring

XB1

XB2

XM1

XM2

XM3

overtemp. switch

motor connections

bottom plate

XK/L

XK/N

wiring fans

M2 M3PE - LfterPE - fans

5x 400 mm

PE - main boardunit ground, left side in front

PE - motor, 300mmto amored chamber in front

XG/L

XG/N

compressor wiring

PE - compressor to mains ground

shrinkage hose 12,7mm+ 1 cable tie SST1

120mm

1x PE - terminal 1 pole1x screw M4x10mm2x fan washer 4,3mm1x PE - terminal 1 pole

1x screw M4x10mm2x fan washer 4,3mm


29/70


Wiring Connections Diagram

16.12.02 He

Edition: 01


switch

coil

temperature sensor

overtemp.switch

drive

overtemp. switch

lid lock, switches lid lock, coilfans compressor mains input

fan M3fan M2

mains switch

S0

unit socket

adhesiveclip

PE - fan 2 PE-fan 3

fan2,

leftside

fan3,rightside

frontofunit

clip6,5mm

clip6,5mm

*

*

*

KM

free cables lengthup to first fixing clip

plug length from clipdesignation

XA

XB1/2

XM1/3

XC

XG

XK

lid switches S1 + S2

overtemperatur switch

motor, connect. 1, 2, 3

lid solenoids Y1 + Y2

compressor

fans M2 + M3

125 mm

140 mm

140 mm

150 mm

300 mm

210 mm

cable conduction unit

detail

view

offans

cablecon

ductionbyclips

drive


30/70



Block Diagram

16.12.02 He

Edition: 01

Y1 Y2


motor

M1

3~

brake resistor

lid solenoid

lid lock left side lid lock right side

lid solenoid

auto transformer100/115V

lid switch lid switch

F3

overtemp. switch

XA XBXC XM XU

instrument plug

main board

M2

XGXK

XN115V

100V

fan for compressor, condenser

M3 M4

V1PT100

compressortemp. sensor

mains switch

legend

screwing connection plug connection

XF

XF

S1

CPUNV-RAM

x 1 0 0 01 0 0 0

BIOFUGE

S1S3 S2S4


31/70




7805

transformer, rectifiers and regulators

F1

XA/1

lid switch

S1..S4

main board

M2

5V (VCC)

XV/1 XV/2

8AT

XA/2XB/1 XB/2 XC/1 XC/2

J

J

Y1

Y2

PTC

NTC

autom. brake control

+15V

DC intermediate circuit0V=A2

A1=GND

driving of FETs (frequency converter)

lid solenoid

CS

fan for condenser

noise filter

compressor with starting relay

XG/1

K1

"E-07"

"E-17"

"E-17"

"E-08"

"E-07"

"E-07"

"E-07" "LId"

14 10

11

13

M3

M2

XL

T0 XN

XPE

3

4

PE chassisPE motor

PE compressorPE condensor fan

1

5

2

R1 220brake resistor

"E-08"

instrument plugwith mains switch

auto transformer100/115V

S0

XG/2


32/70




K1(M2)5

U

F

temperature sensorPT100

JV1

"E-7"

1

2

XM/1 XM/2 XM/3

F3

M1

overtemperature switch

Motormotor

3

4

U1 (5V)A1 = GND

U1 (5V)A1

U2 (15V)

A2 R44

frequency converter

P part

key and indication part

EASYCONTROL

main baord part 2

ASIC80

dyndyn

dyn

CPU NV-RAM

physical separation

INHIBIT

RESET

2x6 HGTPs

Y1, Y2

E- 8

"E- 0"

"E- 0"

E- 0

"E-10""E-11"

"LId"

ii

i

15V LId...

"LId"

"OP"

13 8 4

3

XF

H1

H6H8

H9H7

H2H3 H4 H5

XF14

3

S1S2

S4 S3 S8 S7

S6S5

A,BF,E

8

A,B,C,DE,F,G,DP

UD-*

UD+

current control res.

MUX


33/70




S 1

S 2

toroidial core, Valvo4322 020 97183+ cable tie

S 1

S 2

toroidial core, Valvo4322 020 97183+ cable tie perform a most narrow winding

as possible!

no. 1 no. 2 no. 3


XA

F1

XM3XM2XM1

XC

PE

XU

XK

XG

XN

drive motor

M 3M 2

Y 1

Y 2

instrument plug

12

45

100V

115V

black

blue

redred

I 0

heat sink

lid switchesS1 u. S2

lid solenoidsY1 und Y2

fans for condenserM2 und M3

M4compressor

auto transformerT0

mains switchS 0

M 1

brake resistorR 101

XB1 XB2

motor overtemp. switchXB1 u. XB2

temperature sensor

Y 1

Y 2

S1

S2

1

4

2

14

2

lid lock, right side

lid lock, left side

1

1

4

4

a

a

b

b

a

a

b

b

PE

N L

L

N

PE - motor

PE - compressor

bottom platebottom plate

PE - fan M2 PE - fan M3

mounting mains ground

amored chamber

pass through from inside all leadsmarked by ellipse

lead-in hole for sensor

1

2

1

2

1

2

mounting of unit ground, right side in front mounting of unit ground, left side in front

PE - armored chamber foot, right side in the rear

PE - main board


1x screw M4x25mm1x PE - terminal 3 pole6x fan washer 4,3mm3x nuts M4


1x screw M4x16mm2x fan washer 4,3mm1x nut M4

PE - mains groundPE - armored housing

PE - motor(from motor harness)

main board

S3

S4

4

4

2

2

1

1


34/70




compressor terminal box

startingcapacitor

starting relay

10 11

12 13

14 PE terminal box

PE

+ +

starting capacitorterminal: 11 u. 13

mains - L

mains - N

fans

drive motor wiring

XB1

XB2

XM1

XM2

XM3

overtemp. switch

motor connections

bottom plate

XK/L

XK/N

wiring fans

M2 M3PE - LfterPE - fans

5x 400 mm

PE - main boardunit ground, left side in front

PE - motor, 300mmto amored chamber in front

XG/L

XG/N

compressor wiring

PE - compressor to mains ground

shrinkage hose 12,7mm+ 1 cable tie SST1

120mm

1x PE - terminal 1 pole1x screw M4x10mm2x fan washer 4,3mm1x PE - terminal 1 pole

1x screw M4x10mm2x fan washer 4,3mm


35/70




switch

coil

temperature sensor

overtemp.switch

drive

overtemp. switch

lid lock, switches lid lock, coilfans compressor mains input

fan M3fan M2

mains switch

S0

unit socket

adhesiveclip

PE - fan 2 PE-fan 3autotransformer

100/115V

auto transformerBV30326

Prim.100V Sek.115V

fan2,

leftside

fan3,rightside

frontofunit

clip6,5mm

clip6,5mm

*

*

*

KM

free cables lengthup to first fixing clip

plug length from clipdesignation

XA

XB1/2

XM1/3

XC

XG

XK

lid switches S1 + S2

overtemperatur switch

motor, connect. 1, 2, 3

lid solenoids Y1 + Y2

compressor

fans M2 + M3

125 mm

140 mm

140 mm

150 mm

300 mm

210 mm

cable conduction unit

detail

view

offans

cablecon

ductionbyclips

drive


36/70


Component Plan Main Board

16.12.02 He

Edition: 01

SCHEMATIC DIAGRAMS

XDAnschlussServiceplugservice

XUSteckerTemperaturfhler

plugtemperature sensor

XM1-XM3AnschlussMotorterminaldrive motor

XASteckerDeckelschalterpluglid lock, switches

XB1, Xb2AnschlussMotorbertemp.terminalovertemp. switch

XNAnschlussNetzterminalmains

XGAnschlussKhlmaschineterminalcompressor

XKAnschlussLfterterminalfans

XCAnschlussDeckelspuleterminallid solenoid


37/70


Edition: 01 Wiring Diagram Main Board

SCHEMATIC DIAGRAMS

Controller

page 4-16

PHASE1_U

PHASE2_U

PHASE3_UPHASE3_O

PHASE2_O

PHASE1_O

DECKELAUF

/UEBERSPANNUNG

TEMPERATUR

TEMP_0

TEMP_1

INHIBIT

DECKELSCHLOSS

KUEHLUNG

UEBERSTROM

LUEFTER

power electronic

page 4-19

+15

U+

PHASE1_U

PHASE3_OPHASE3_U

PHASE2_UPHASE2_O

PHASE1_OINHIBIT

U-*

protection circuit

page 4-17

+15

U+

ZK2

U0

U-

DECKELAUF

/UEBERSPANNUNG

UEBERSTROM

U-*

temperature measurement

page 4-15

TEMPERATUR

TEMP_0

TEMP_1

power supply

page 4-15

U-

U0

ZK2

U+

DECKELSCHLOSS

KUEHLUNG

LUEFTER


38/70



SCHEMATIC DIAGRAMS

ZK2

R18

470RSMD

D9

1N4007

Hilfszwischenkreis

R162R5NTC

C162n2

Y

EMI FilterFunkentstoerfilter

1

2 4

3L1

2x5.6mH2A

Power Connection

L1

2

XN F1

SI 8AT6.3x32 UL

PE

N

XPE1

R17120k

C150u6X

D4

P600K

R1456k

C13470u200VC19

220n400V

1 2BR1

BR_POWER

U+

U0

DC intermediate circuit

U-

R1556k

C14470u200V

C92n2Y

C102n2Y

D5

P600K

120V

T1

T120V/9VBV28969 GASS

V7SM4007SMD

V5SM4007SMD

V6

SM4007SMD

C201000u25V

C2110u

VI2 GND

1

VO 3

V1780M05C

not placed

VCC

C7110u

SMD 25V TA

C12100nSMD

GND

R21

330RSMD

KUEHLUNG

C11100nSMD

V8

SM4007 SMD

1

2

Z10u1/100R

1

2

4

3K1a

REL120V HL1-HP-AC120

compressorXG

1

2

lid solenoidXC

1

2

V50

SM4007SMD

V61SM4007SMD

V62SM4007SMD

R28100R

SMD

C172n2

Y

R1947R

SMD

V2

T1213

R201kSMD

6 1

24

D6S21ME4

6 1

24

D7S21ME4

GND

to drive lid lock

to drive fans

to drive compressor

DECKELSCHLOSS

LUEFTER

R27

330RSMD

GND

R2247R

SMD

V3

T1213

R231kSMD

6 1

24

D8S21ME4

1

2

Z20u1/100R

R462R6 PTC

V63

SM4007SMD

fansXK

1

2

R29100R

SMD

C182n2

Y

R2547R

SMD

V4

T1213

R261kSMD

GND


39/70



SCHEMATIC DIAGRAMS

C2100nSMD

R222kSMD

auto calibration

R1

1kSMD

3

21

8

4

D1ATLC272SMD

C5

1nSMD

VCC

R4270kSMD VCC VDD

(74HCT4052)

VEEC3

100nSMD

C4100nSMD

VSS GND

Voltage to Frequency Converter

R5100KSMD

R322kSMD 5

67

D1BTLC272SMD

X012

X114

X215

X311

Y01

Y15

Y22

Y34

INH6

A10

B9

X 13

Y3

D274HC4052SMDR12

120RSMD 0.1%

R13100R

SMD 0.1%

GND

1 1

2 2

temperature sensorPt100XU1

R9390RSMD

TEMP_1TEMP_0

GND

Temp_1 Temp_0 X,YA B0 0 100R1 0 120R1 1 PT100

GND

COMP IN7

CURR IN1

THRES6

VS

8

R/C 5

F OUT 3GND

4

REF

CUR

2

D3LM331

C61 u S MD 35V Ta

R1010kSMD

R1139kSMD

C810u

VCC

GND GND

C7310uSMD 25V TA

nicht bestuecktnot placed

temperature signal

C1220n

Fo

TEMPERATUR

R712kSMD

R6100KSMD

C71 u S MD 35V Ta

GND

R82k7SMD

GND

GND


40/70



SCHEMATIC DIAGRAMS

C30100nSMD

C31100nSMD

VCC VDD

not placed

C23 22p SMD

C24 22p SMD

J1J 11.14112

GND

GND

GNDGND

R47100RSMD

98

D15D74HC14SMD EA/VP35

X121

X220

RESET10

INT014

INT115

T016

T117

P1.02

P1.13 P1.24

P1.35

P1.46

P1.57

P1.68

P1.79

P0.0 43

P0.1 42

P0.2 41

P0.3 40

P0.4 39

P0.5 38

P0.6 37

P0.7 36

P2.0 24

P2.1 25

P2.2 26

P2.3 27

P2.4 28

P2.5 29

P2.6 30

P2.7 31

RD 19

WR 18

PSEN 32

ALE/P 33

TXD 13

RXD 11

D13

80C21PLCC PROG 0978

AD0AD1AD2AD3AD4AD5AD6AD7

AD0AD1AD2AD3AD4AD5AD6AD7

WR_6X

GND 1312

98

21

1110

GND

ABCDEFG

DP

A B C D E F GDP A B C D E F GDP A B C D E F G DP A B C D E F G DP

E

F

H12 LED

RT 3MMH13 LED

GN 3MM

V10BC807

R311k

SMD

V18BC807

R521k

SMD

V19BC807

R531k

SMD

V9BC807

R321k

SMD

V17BC807

R511k

SMD

C32

100nSMD

A1

B2

C3

G16

G2A4

G2B5

Y0 15

Y1 14

Y2 13

Y3 12

Y4 11

Y5 10

Y6 9

Y7 7

VCC

16

GND8D14

74HCT138SMD

C37 10u

11223344556677

8

8

9

9

10

10

11

11

12

12

13

13

14

14

XfDIP14

13

12111098

12

VCC

11

22

33 44

55

66

77 8 89 9

10 1011 1112 12

13 1314 14

XF

DIP14

>>>

>>

CS 1

SK 2

DI 3

DO 4GND5

VCC8

NC6

NC7

D11

9346

/DECKEL

/DECKELAUF

/LUEFTERVCC

56

D15C

74HC14SMD

GND

34D15B

74HC14SMD

R42

10k SMD

R41

10k SMD

VCC

1234

XE

Burndy 4pol

11 10D15E

74HC14 SMD

13 12

D15F

74HC14 SMD

LUEFTER

KUEHLUNG

VCC

GND

PC

GND

1234

XD

Burndy 4pol

S1 = LIDS2 = Quick RunS3 = STOPS4 = STARTS5 = - SPEEDS6 = + SPEEDS7 = - TEMPS8 = +TEMPS9 = - TIMES10= + TIME

V11

S2S1 S3 S4

V12 V13 V14

S5 S6 S7

V15 V16 V20 V53 V54

S9S8

V55 V56 V57

S10R304k7SMD

7 6 4 2 1 910 5 3

H7HDSP-5551

7 6 4 2 1 910 5 3

H6HDSP-5551

7 6 4 2 1 910 5 3

H5HDSP-5551

A

B

H8 LED

GE 3MMH9 LED

GN 3MM

Time

7 6 4 2 1 910 5 3

H3HDSP-5551

7 6 4 2 1 910 5 3

H4HDSP-5551

Temp

7 6 4 2 1 910 5 3

H2HDSP-5551

8x220R SMD

7 6 4 2 1 910 5 3

H1HDSP-5551

D12 Q1 19

D23 Q2 18

D34 Q3 17

D45 Q4 16

D56 Q5 15

D67 Q6 14

D78 Q7 13

D89 Q8 12

C11

OC1

D16

74HC573 SMD

R5010kSMD

/RESET

VCC

R404k7SMD

VCC

GND

VCCREF1

RESIN2

CT3

GND4

VCC 8

SENSE 7

RESET 6

RESET 5

D10

TL7705 SMDC22100nSMD

C341u

GND GNDGND

C701u

SMD 35V TA

not placed

C28100nSMD

C29100nSMD

VDD

VDD

AD0

AD1

AD2

AD3

AD4

AD5

AD6

/RD

/WR

GND

VDD

GND

GND10

VDD11

ALE12

A013

A114

A215

DREHZ_IN16

DREHZ_OUT17

VDD18

WR_6X

19

WR_7X20TEMP221

MODE22

RESET23

BIT924

INH_IN25

TEST26

D7

9

D6

8

D5

7

D4

6

D3

5

D2

4

D1

3

D0

2

GND

1

VDD

68

WR

67

RD

66

TOUT

65

TE

64

TEMP5

63

TEMP4

62

TEMP3

61

GND 60

PH1_O 59

PH2_O 58

PH3_O 57

PH1_U 56

PH2_U 55

PH3_U 54

GND 53

VDD 52

TAKT55_IN

51

TAKT55_OUT 50TAKT11_IN 49

PWM_IN 48

PWM_OUT1 47

PWM_OUT0 46

F_IN 45

F_OUT 44

Q_OUT27

Q_IN28

TAKT

_029

TAKT

_130

RD

_4X31

RD

_5X32

TEMPER

ATUR33

INTERRUPT34

GND35

TEMP136

TEMP037

VDD38

FEHLER39

UEBERSP40

INH

_O041

INH

_O142

GND43

D12

ASIC80

AD7

ALE

WR_6X

GNDVDD

VDD

8-BIT-Modus

PHASE1_OPHASE2_OPHASE3_OPHASE1_UPHASE2_UPHASE3_U

INHIBIT

GNDVDD

GND

GND

GND

R54

330RSMD

C3510u

C3610u

1 2D17A

74HC14SMD

GND VSS

C27100nSMD

C6910u

SMD 25V TA

C7210u

SMD 25V TA

C25100nSMD

C26100nSMD

C33100nSMD

A B C D E F GDP

R1031kSMD

V45BC807

A B C D E F GDP A B C D E F GDP

R1031kSMD

V43BC807

V44BC807

11 10

D17E

to drive lid lock

to drive compressor

to drive fans

signal lid open

signal over voltage

signal over current

temperature signal

74HC14SMD

R1021kSMD

R55

10kSMD

56

D17C

74HC14SMD

98

D17D

74HC14SMD

DECKELAUF

DECKELSCHLOSS

VCC

VCC

R56

3k3 SMD

/DECKELAUF

/DECKEL

/RESET

ERROR

INH

GND

GND

GND

VDD

GND

GND

GND

TEMP_0TEMP_1

TEMPERATUR

34

D17B

74HC14SMD

R5710kSMD

/UEBERSPANNUNG

UEBERSTROM

GND

13 12

D17F

74HC14SMD

GND


41/70



SCHEMATIC DIAGRAMS

U0

U+

R9810k11W

motor overtempemperatureswitchXB

1 2

XB1 F2E11T11G80118 GRAD

XAlid lock, switches1

1

2

2

XA1

R91220R SMD

not placed

+15

overcurrent signal

UEBERSTROM

R9612kSMD

VCC

1

2

3

4

D34SFH6106-3SMD

C63

100n

SMD

C7510uSMD 25V TA

R9222kSMD

V52

P6KE440A

Brake

Brems-

Widerstand

R87

2M2SMD

R101470R9W

R24470R9W

C64100nSMD

R991M

V51

ZMM15

SMD

C76100u25V SMD

R88

10kSMD 1%

C6547pSMD

R9568kSMD

Resistor

3

2

1 5

6

7

4

D32TL081SMD

V49BUZ215

R107

15RSMD

GND

C68

470p

SMD

1

2

3

4

D33

SFH6106-3

SMD

V47BC817

GNDV48BC817

R93

2k2 SMD

R94

2k2 SMD

C60100nSMDR97

12k

SMD

1

2

3

4

D35SFH6106-3SMD

lid open signal

excess voltage signal

C6610u

DECKELAUF

C7410u

SMD 25V TA

/UEBERSPANNUNG

U-*

GND

C6110nSMD

C6210nSMD

R100 0R18 2WR8910kSMD 1%

DC intermediate circuitvoltage control

U-

ZK2

relative excess voltage recognition

active, if the motor put back powerto the intermediate circuit

R901M

absolute excess voltage recognition

active, if the brake resistor is faulty or ifthe mains voltage is too high

over current recognition

Alternatively for V49:HGTP 10N50C1D


42/70


Wiring Diagram Main Board

16.12.02 He

Edition: 01

SCHEMATIC DIAGRAMS

C47

10nSMD

V27BC807

GND

R76100kSMD

V28BC807

C5410u

SMD 25V Ta

C38100nSMD

C45100nSMD

C46100nSMD

R77

100kSMD

GNDGND GND

C5810u

GND

VCC

GND

C7310u

SMD 25V TA

not placed

INHIBIT

R81

47kSMD

V29

LL4148

1 2

D26A

74HC14SMD

3 4

D26B

74HC14SMD

R64

220RSMD

R65

220RSMD

1

2

3

4

D18SFH6106-3SMD

1

2

3

4

D19SFH6106-3SMD

VCCR581M

SMD

V40LL4148

V44

LL4148V46ZMM12SMD

C5510u

SMD 25V TA

R78

100k2W

V21BUZ215

C481nSMD

R48

15RSMD

U+

+15

V22

BUZ215

C511nSMD

R102

15RSMD

R591M

SMD

V39LL4148

R66

220RSMD

R67

220RSMD

1

2

3

4

D20SFH6106-3SMD

1

2

3

4

D21SFH6106-3SMD

VCC

5 6

D26C

74HC14SMD

C39220pSMD

R82

33kSMD

V30

LL4148

9 8

D26D

74HC14SMD

GND

PHASE1_O

PHASE1_U

C40220pSMD

V31

LL4148

GND

R68

220RSMD

R69

220RSMD

1

2

3

4

D22SFH6106-3SMD

VCC

V43

LL4148V45ZMM12SMD

R80

100k2W

V23BUZ215

R103

15RSMD

MotormotorXM1

1

2

3

V24BUZ215

C491nSMD

R104

15RSMD

R601M

SMD

R611M

SMD

V38LL4148

C5610u

SMD 25V TAR70

220RSMD

R71

220RSMD

1

2

3

4

D23SFH6106-3SMD

1

2

3

4

D24SFH6106-3SMD

VCC

13 12

D26F

74HC14SMD

C41220pSMD

R83

47kSMD

V32

LL4148

11 10

D26E

74HC14SMD

GND

PHASE2_O

PHASE2_U

C42220pSMD

R84

33kSMD

3 4

D27B

74HC14SMD

GND

1 2

D27A

74HC14SMD

R73

220R

SMD

1

2

3

4

D25SFH6106-3SMD

1

2

3

4

D28

SFH6106-3SMD

V37LL4148

V41

LL4148

V42ZMM12SMD

R79

100k

2W V25BUZ215

C521nSMD

R105

15RSMD

V26BUZ215

C501nSMD

R106

15RSMD

R621M

SMD

V36LL4148

C5710u

SMD 25V TA

R72

220RSMD

R74

220RSMD

VCC 1

2

3

4

D29SFH6106-3SMD

1

2

3

4

D30SFH6106-3SMD

13 12

D27F

74HC14SMD

C43220pSMD

R85

47kSMD

V33

LL4148

5 6

D27C

74HC14SMD

GND

Phase3_O

Phase3_U

C44220pSMD

R86

33kSMD

V34

LL4148

9 8

D27D

74HC14SMD

GND

11 10

D27E

74HC14SMD

R75

220RSMD

VCC 1

2

3

4

D31SFH6106-3SMD

R631M

SMD

V35LL4148

C531nSMD U-*


43/70

DIASSEMBLY OF INSTRUMENT PARTS

Edition:01 5-1 Biofuge fresco27.11.02 He

The index numbers stated in ( ) reappear within the spare part figures (block diagram, schematicdiagram of cooling plant) and the spare part lists.

5.1 Dismantling the Housing

5.1.1 Front Panel (100)

Open the lid. Pull out the mains plug. Pull the unit a little over the table's rim and remove both screws (105) from the bottom of the front

panel.

Pull the front panel's lower rim a few centimetre to front and push it vertically out of the upper

plastic frame. ATTENTION! Do not pull the front panel too much to front! Doing so could tear offthe upper plastic holders!

For continuing the disassembly remove or disconnect all wires.

Refitting the front panel is performed analogously in reverse order.

5.1.2 Lid (130)

Open the lid. Pull out the mains plug.

Remove the 4 Allen head screws (135), using a 5 mm key and take off the lid.

5.1.3 Casing (120)

Remove the front panel and the lid (see 5.1.1 and 5.1.2).

Remove the 3 Phillips screws (125) in front and both lateral.

Press both legs of the torsion spring down and fix them with a 5-mm set screw (or one of the 4Allen head screws) in the bore of the frame.

Lift the housing at the front and the rear, pull upwards past the legs of the torsion spring and flipover to the front. If the leg is fixed with an Allen head screw, carefully widen the opening of thehousing with a screw driver!

Pull off mains switch wires and take off the casing inclusive lid sealing.

Reassemble the device analogously in reverse order.

Insert the rubber sealing with the gluing seam in front and press on evenly all around


44/70



5.2 Replacement of the Sealing Elements

5.2.1 Motor Rubber Cover (221)Temperature probe and motor are glued to each other! When disassembling the two, damage to eitheror both of them cannot be excluded!

Open lid, unplug mains plug

Loosen rotor nut (90) with 10-mm socket wrench (91) and pull out rotor. Press out motor cover from the lower edge to the middle and pull upwards off the plastic flange of

the motor.

Carefully pull motor cover and the two insulating washers (224) situated underneath upwards alongthe drive axis and deposit on the side of the temperature probe within the rotor chamber.

When the motor cover is replaced, the temperature probe must be disassembled and adjustedanew upon reassemble (see section on removal of the temperature probe)!

When the motor cover is reinserted, the upper rubber sleeve must be pressed in onto the plasticflange (231) of the motor and must be pressed down so that the ring-shaped swelling fits preciselyinto the groove of the flange.

Check: When finally flanging the inner sleeve lip (covers the upper rim of the plastic flange), theouter edge of the sleeve must slant downward so that condensation water may not enter the motorbearing.

For fixing and as a protection against torsion, the motor cover plus flange must be secured at theedge with 3 drops of Loctite 495.

5.2.2 Lid Gasket (123)

Unscrew the casing (120) and pull it off from the bottom plate (360).

Separate the sealing's edge from the chamber's rim by pulling it inside.

Lift off the gasket on this place.

Work all the way round, until the gasket can be removed completely.

Assembling instructions

Push the gasket over the rim of the rotor chamber, starting with the gluing seam in front.

Work from both sides to the rear, but do not lengthen the gasket by this way.

While doing so press the sealing edge under the casing's rim. Fold the rim of the rubber sealing over the rotor chamber's opening, starting from front to rear

Press the casing back again onto the bottom plate and assemble it analogously in reverse order.

The lid gasket must be completely sit close on the rotor chamber wall!

The rotor chamber must be sealed completely, when the lid is closed correctly!


45/70



5.3 Replacement of Mechanical Components

5.3.1 Lid Lock Assembly (210)The lid lock assembly encompasses both lid locks with two built-in microswitches each.

Disassemble housing (see 5.1.3).

Expose cables for microswitches and lid coils (undo cable tree, unscrew cable clips).

Remove outer (214) and both inner (215) fastening screws from each of the locking mechanisms. Press microswitches (211) through the frame opening inside and pull both unlocking systems

upwards and out.

Note for mounting

Align rubber spacer (212) and screw locking systems on.

Do not overtighten the screws!

The locking pins must not jam! Secure Screws with Loctite 221.

Fix the cable again to the cable tree and fasten with clips. Cables may not come in between fanblades!

Once the instrument is installed, check locking mechanism several times by repeated opening andclosing.

5.3.2 Torsion spring (202

Disassemble housing (see 5.1.3)

Remove set screw(s) or Allen head screw (135) from legs in order to disassemble the housing.

Screw out fastening screw (pan-head 206) of the torsion spring and unbend the spring.

Remove fastening nut (205) of the swivel leg (203) on the side of the spring and push the shaft(200) to the left until you can remove the spring.

For removal of the shaft, press right-hand slide bush (204) out and push the shaft to the right until itleaves the left-hand slide bush.

Lift the shaft on the left and pull obliquely to the left out of the right-hand frame opening.

For mounting and adjustment of the torsion spring you must follow the instructions in section 2.4,please note also the drawing on page 6-4.


46/70



5.4 Replacement of Electrical Components

5.4.1 Fuses (113) on main board

Dismantle the front panel (see 5.1.1) and put the device far enough to the rear so that the panelcan be placed without stretching strain of wires on a suitable depot (e.g. box) in front of unit.

Check the micro fuses and if necessary replace them by equivalent and undamaged ones.

Perform a test run and search for blowing cause. Reassemble the device analogously in reverse order.

5.4.2 NV-RAM (113) on main board

Notice old displayed NV-RAM's version number when powering on (second No. in sequence)

Depose the front panel as described in 5.4.1.

ATTENTION - CMOS components! Discharge your body before handling!

Notice correct position of NV-RAM (8 pins) and pull carefully out of socket.

Reinsert the new NV-RAM correctly.

Reassemble the device analogously in reverse order and check the displayed NV-RAM's versionnumber.

Note! A new NV-RAM version will include parameter changes (e.g. new rotor type or any speed

limitations etc.) which can be verified in the display.

5.4.3 Microcontroller (111) on main board

The microcontroller normally comes with the board. It could be possible that there will be a changesometime necessary when the will be upgrades.

Notice the old Controller's version number when powering on (first displayed No.).


ATTENTION - CMOS components! Discharge your body before handling! Notice the correctController position (CPU) and pull out carefully. ATTENTION - do not damage the socket (use

cranked pliers)! Reinsert the new Controller chip correctly.

Reassemble the device analogously in reverse order and check the displayed Controller's versionnumber.

Note! A new Controller version will include program changes (e.g. modifications of control functions)which might be verified only by measuring performances.


47/70



5.4.4 Main Board (110)The key and indication board is part of the main board and cannot be ordered separately!


Disconnect all terminal connections as: mains supply XN, compressor box XG, both lid solenoidsXC and both fans XK.

Pull out all plug connectors as: protecting earth conductor PE, lid switches XA, temperature sensorXU, motor lines XM (1-3) and over-temperature cut-out XB (1+2).

Remove all fastening screws of the main (117) and indication board (115), remove the washers(116) and subsequently the boards.

Touch a grounded receptacle to discharge your body before touching the sensitive CMOScomponents.

Take the NV-RAM (112) out of box (or re-use the old but trouble-free component) and insert it intothe socket of the new main board (see 5.4.2 and 5.4.3).

The components which is installed at the socket must be removed and scrapped

Mount the new board onto the front panel, replace the washers and re-tighten all nuts.

Do not mix up disconnected cables during re-connection!

Reassemble the device in reverse order and perform a test run, making sure the drive turns in theright direction (see imprinted arrow on rim of rotor chamber)!

5.4.5 Mains switch (121)

Remove the casing (see 5.1.3)

Compress both snap hooks of the mains switch and press the switch from inside out of thecasing's opening.

Pull off the cable plugs and transfer them to the new mains switch.

Spread the snap hooks a little, refit the mains switch and assemble the unit completely.

5.4.6 Mains input socket (361)

Remove both fixing screws (365) and pull out the socket carefully

Pull off the cable plugs and transfer them to the new socket.

Insert the socket and re-tighten it on the tab of the bottom plate.


48/70



5.5 Replacement of Drive Components

5.5.1 Drive Motor (230)

Remove the casing (see 5.1.3).

Remove the rubber flange and both isolating disks (see 5.2.1).

Disconnect the leads for motor XM (1-3) and overtemperature switch XB (1+2)

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Biofuge Fresco 100V-120V Green English