Troubleshooting guide / error messages
48
Excess temperature protector defect.
The protection temperature is below the set working temperature
setpoint.
Set the protection temperature to a higher value.
Insufficient cooling of condenser. Clean the air-cooled condenser. Check
the flow and the temperature of the cooling water of a water-cooled
condenser.
Stage 1 of the compressors does not work.
Automatic restart after short cool-down, message E 21 goes off
Stage 2 of the compressor does not work.
Cooling machine – overload protection
The driving motor of the cooling compressor is equipped with an
overload protection which is triggered by increased internal
temperatures or excessive current consumption.
Shutdown can be caused by
- insufficient ventilation,
- insufficient wall distance,
- soiled condenser,
- high room temperature
- switching off and on in short sequence
Excess temperature in stage 1 of the compressor.
Excess temperature in stage 2 of the compressor.
Short circuit of control line to cooling machine during self-test.
The cable of the excess temperature protector has been disconnected or
short-circuited
The early warning system for low level reports a critical fluid level. Refill
bath fluid.
60
30
15
45
4 s
By quickly switching off and restarting the unit the alarm is
cancelled.
If the error occurs once more after the restart, a remote diagnosis is
required.