Owner's manual

9. Troubleshooting guide / Error messages

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Whenever the microprocessor electronics registers a failure, a complete

shutdown of the compressor and circulating pump is performed. The alarm

light "

" illuminates and a continuous signal tone sounds.

The LED temperature display indicates the cause for the alarm in form of a

code.

Press enter

to quit the audible signal.

The recirculating cooler is operated without bath fluid, or the liquid level is

insufficient.

Replenish the bath tank with the bath fluid.

Tube breakage has occured (insufficient filling level due to excessive bath fluid

pumped out). Replace the tubing and replenish the bath tank with the bath

fluid.

Cable of the working temperature sensor interrupted or short-circuited.

Error in A/D converter

The return temperature is above the switch-off value of the high temperature

protection (85°C). Check dimensioning of application.

Use a stronger recirculating cooler if necessary.

 The motor protection switch for the compressor motor is off. Set motor

protection switch to >1< . Check the fuses.

 The pressure sensor of low pressure side (evaporation pressure) is faulty,

short-circuited or has a line interruption.

Have the repair done by a specialist.

 The motor protection switch for the compressor motor is off. Set motor

protection switch to >1< . Check the fuses.

 The pressure sensor of high pressure side is faulty, short-circuited or has a

line interruption.

Have the repair done by a specialist.

The suction gas temperature sensor is faulty, short-circuited or has a line

interruption.

Have the repair done by a specialist.

After eliminating the malfunction, press the mains power switch off and on

again to cancel the alarm state.

If the unit cannot be returned to operation, contact an authorized service

station.