Hettich ROTINA 38 Guida all'installazione

11.05 Andreas Hettich GmbH & Co. KG AR1703EN

Repair instructions

ROTINA 38 / 38 R

2/55

Andreas Hettich GmbH & Co. KG

Föhrenstraße 12, D-78532 Tuttlingen / Germany

Phone (07461) 705-0

Fax (07461) 705-125

[email protected], [email protected]

www.hettichlab.com

prior permission of the copyright owner.

Modifications reserved!

AR1703EN / 11.05

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Contents

1. Introduction ............................................................................................................7

2. Meaning of the symbols ........................................................................................7

3. Description of the centrifuge ................................................................................8

3.1 Control panel (CP) ............................................................................................8

3.2 Supply board (SB).............................................................................................9

3.3 Frequency converter (FC) .................................................................................9

3.4 Special features ..............................................................................................10

3.5 Motor / Tacho system...................................................................................... 10

3.6 Imbalance switch.............................................................................................11

3.7 Interlocking......................................................................................................11

3.8 Cooling............................................................................................................11

3.8.1 Temperature sensor B1, in the centrifuge chamber.................................11

3.8.2 Function of the cooling board (CB) A3 .....................................................11

3.9 Fan..................................................................................................................11

3.10 Offset calibration .............................................................................................12

3.11 Protection........................................................................................................12

4. Troubleshooting procedures .............................................................................. 12

5. Error messages ....................................................................................................13

5.1 MAINS RESET................................................................................................13

5.2 Brief description ..............................................................................................13

5.3 Description and elimination of errors...............................................................15

6. Settings and interrogations................................................................................. 24

6.1 Control panel...................................................................................................24

6.2 Procedure for initialization...............................................................................24

6.3 Imbalance Mode..............................................................................................25

6.4 OFFSET alignment .........................................................................................25

6.4.1 OFFSET value .........................................................................................26

6.4.2 Procedure for performing an OFFSET alignment.....................................26

6.4.3 Note for temperature sensor in centrifuge chamber.................................26

6.5 Parameter interrogation ..................................................................................27

6.6 Acoustic signal ................................................................................................27

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6.7 Hours of operation .......................................................................................... 27

6.8 Checking the motor slippage .......................................................................... 28

6.9 Setting display contrast on control panel ........................................................ 28

6.10 Imbalance switch-off ....................................................................................... 29

7. Functional check after a repair........................................................................... 30

8. Assembling and disassembling components ................................................... 30

8.1 Speed sensor B3 (speedometer).................................................................... 33

8.2 Motor M1 / Vibration damper .......................................................................... 33

8.3 Frequency converter (FC) A2 ......................................................................... 33

8.4 EPROM on FC................................................................................................ 34

8.5 SB (supply board) ........................................................................................... 34

8.6 CB A3 (cooling board) only ROTINA 38 R...................................................... 34

8.7 Control panel (CP) A4..................................................................................... 34

8.8 EPROM on CP................................................................................................ 34

8.9 Control cables (CC) ........................................................................................ 35

8.10 Lid locking (LL) Y1 .......................................................................................... 35

8.11 BR R1 (brake resistor) .................................................................................... 35

8.12 Radio interference suppression filter (Z1)....................................................... 35

8.13 Mains choke coil (L1)...................................................................................... 36

8.13.1 Assembly and disassembly ..................................................................... 36

8.13.2 Short the mains choke coil....................................................................... 36

8.14 Mains switch (Q1) ........................................................................................... 37

8.15 Appliance plug (B1), overvoltage protection (F1)............................................ 37

8.16 Imbalance switch ............................................................................................ 37

8.17 Fan (M5) at the motor (only ROTINA 38 R) .................................................... 37

8.18 Temperature sensor B1 in centrifuge chamber............................................... 37

8.19 Temperature sensor (B2) at condenser .......................................................... 38

8.20 Fan (M3, M4) .................................................................................................. 38

8.21 Compressor (M2)............................................................................................ 38

8.22 Gas filled damper............................................................................................ 38

8.23 Isolating transformer (TR1)............................................................................. 39

8.24 Fuse holder..................................................................................................... 39

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9. Technical documents .......................................................................................... 40

9.1 Speedometer-code-position of the rotors ........................................................40

9.2 Cooling diagram..............................................................................................41

9.3 Circuit diagrams ..............................................................................................42

9.3.1 Abbreviations of the cable colours ...........................................................42

9.3.2 Mains input with supply board (SB) with 1703, 1707 ...............................43

9.3.3 Mains input with supply board (SB) with 1703-01, 1707-01 ..................... 44

9.3.4 Mains input with supply board (SB) with 1703-02, 1707-02 ..................... 45

9.3.5 Circuit diagram supply board (SB) ...........................................................46

9.3.6 Connecting diagram and component layout supply board (SB) ...............47

9.3.7 Signals at control cable (between CP-SB) ...............................................48

9.3.8 Block diagram control panel (CP) ............................................................49

9.3.9 Connecting diagram Control board (CP)..................................................50

9.3.10 Block diagram and control panel signals at FC........................................51

9.3.11 Connecting diagram frequency converter (FC) ........................................ 52

9.3.12 Circuit diagram cooling board ..................................................................53

9.3.13 Connecting diagram and component layout cooling board ......................54

10. Technical specifications ..................................................................................55

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Abbreviations

CP Control panel

FC Frequency converter

SB Supply board

CB Cooling board

CC Control cable

LL Lid locking

BC Braking chopper

BR Brake resistor

MR Mains reset,

mains switch OFF - ON

EC Error cause

ES Error consequence

ER Error remedy

M Measurements

ECR Error-code reset

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1. Introduction

• Repairs must only be carried out by personnel authorised to do so by the

manufacturer.

Interventions and modifications at centrifuges, which have been conducted

by persons not authorized by the HETTICH company, are at their own risk

and entail the loss off all guarantee and liability claims. In such an event any

guarantee claim or liability claim against the HETTICH company expire.

• Only original spare parts and original accessories licensed by the Hettich company

are allowed to be utilised.

If no original spare parts or no original accessories are used, any guarantee

claim or liability claim against the HETTICH company ceases to exist.

• Information about the operation of the centrifuge please see operating instructions.

• We reserve all rights for these technical documents.

2. Meaning of the symbols

Symbol on the machine:

Attention, general hazard area.

Before using the centrifuge implicitly read the operating instructions and pay

attention to the safety relevant references!

Symbol in the repair instructions:

Attention, general hazard area.

This symbol refers to safety relevant warnings and indicates possibly

dangerous situations.

The non-adherence to these warnings can lead to material damage and injury

to personal.

Warning! Danger for human lives by electric shock.

Warning of hot surface.

This symbol refers to important circumstances.

CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,

BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset

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3. Description of the centrifuge

These microprocessor-controlled centrifuges are comprised of the following electrical

components:

• Control panel (CP), microprocessor-controlled

• Supply board (SB)

• Frequency converter (FC, motor control), microprocessor-controlled

• Motor with speed sensor (speedometer)

• Braking chopper (BC) with brake resistor (BR)

• Lid locking (LL)

• Cooling board (CB), only Rotina 38 R

3.1 Control panel (CP)

The CP is the ”brain” or ”master” of the centrifuge.

Via a serial data bus system, the MASTER controls its SLAVE, the component:

− frequency converter (FC)

The individual tasks of the CP are:

• Management of operator inputs and control of LCD display.

• Storage of 3 run programs.

• Control of components:

− FC via the enabling circuit and via the serial interface.

− cooling and fan.

• Evaluation of the speed sensor (speedometer).

• Evaluation of the imbalance switch.

• Evaluation of the FC fault alarm circuit.

• Evaluation of the LL open/closed signalling circuit.

• Control of the relay for the LL solenoid at rotor standstill

• Temperature measurement and sensor evaluation of the temperature sensor in

centrifuge chamber (only refrigerated centrifuge).

• Routine for input, storage and transfer of temperature offset values.

• Format of the serial interface:

- 5 Volt interface with 3 conductors.

- (16-pole control cable, pole 6, 8 and 11).

• The CP is powered from the SB via the control cable:

+ 10...15 Volt pole 1,2

GND pole 15,16

CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,

BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset

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3.2 Supply board (SB)

The SB performs the following individual functions:

• 12 V DC and 5 V DC supply for the SB.

• 12 V DC supply for the CP.

• 12 V DC supply for the CB (only ROTINA 38 R).

• Plugging station X5 for mains power supply, LL magnet and transmission of the

signalling circuit for LL-switch (open/closed over opto-coupler to the CP).

• Power supply for speed sensor (speedometer).

• Plugging station X4 for speed sensor cable an0d transmission to the CP and FC.

• Control of the relay for the LL solenoid at rotor standstill

• Plugging station X3 for the imbalance switch and direct transmission of the

imbalance signal to the CP.

• The 5 Volt interface with 3 conductors is converted to an RS 485 interface with 2

conductors:

- Interface to FC: RS 485-interface via 2 conductors.

• Transfer of primary enabling (=Hardware STOP) CP ⇒FC

• Transfer of fault circuit (FC-ERROR) FC ⇒CP

3.3 Frequency converter (FC)

The FC performs the following individual functions:

• Generation of the motor power supply.

(3-phase AC current of variable frequency and voltage)

Mode of operation: The mains supply is rectified, smoothed and chopped in three

bridge elements to give a pulse-duration modulated supply.

• Monitoring of the motor current.

• Evaluation of the overtemperature switch in the motor (only version 115V, AC).

• Slave behaviour (handling of interrogations and commands from the CP via the serial

interface):

RS 485-interface with 2 conductors

(10-pole control cable, pole 3 and 5).

• Evaluation of the primary enabling (Hardware STOP) for the FC

(10-pole control cable, pole 7).

• Evaluation of potential faults and monitoring of the fault circuit (FC-ERROR)

(10-pole control cable, pole 4).

• The electrical power, which resulted from braking, will be conducted to the BR. The

braking chopper switches at a voltage:

− from approximately 390V (230V series).

− from approximately 200V (115V series).

• The BR is protected by an overtemperature switch. At a short circuit on the BC, which

is located on the FC, the BR overheats because of high current. The

overtemperature switch cuts off the voltage supply from the FC. After cooling down at

the BR the voltage supply is switched on again.

CP : control panel, FC : frequency converter, SB : supply board, CB : cooling board, CC : control cable, LL : lid locking, BC : braking chopper,

BR : brake resistor, MR : mains reset, EC : error cause, ES : error consequence, ER : error remedy, M : measurements, ECR : error-code reset

10/55

• The CP issues the following via the serial interface:

− Speed

− Starting and braking levels

− Control commands START, BRAKE, STOP

• State display by LED´s: In standby mode the green LED is on

In running mode the green LED is on

In fault mode the green LED flashes

If the FC processor detects a fault, it shuts down itself automatically and triggers the

fault circuit (FC-ERROR). The CP then interrogates the type of fault via the serial

interface.

3.4 Special features

• Multiprocessor concept:

Although one microprocessor will fail, the other one will continue to monitor its

assigned area.

If the CP fails, the drive will be shut down automatically by the FC when no inter-

rogations have been received via the interface for more than 30 seconds.

• Interface concept:

Transmission of data is monitored by an extra check sum.

• Hardware concept:

All switches with a safety relevant function are of the NC-contact type, which

means that loose contacts and open-circuit faults can also be detected.

3.5 Motor / Tacho system

• The motor is a 3 phase asynchronous motor with 2 pairs of poles.

• A speed sensor (speedometer) attached to the motor receives the following from the

transmitter attached to the rotor,

− rotor code information (see section "9.1") and

− speed data (6 pulses per revolution)

• The ACTUAL speed is monitored and controlled via the CP

− Double safety: The FC is also programmed that no value of speed

in excess of the maximum permitted rotor speed

can be selected. The FC monitors the speed and

switches off at excess speed with error code

“ERROR 84”.

• Rotor standstill is monitored via the CP.

− The lid can only be opened when the CP has detected standstill.

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