JULABO LH 85 High Dynamic Temperature System - Manual (Page 74)

Remote control
74
-45 WARNING:
TO OFTEN SWITCH ON/OFF
DEVICE BY USER, PLEASE
WAIT, DEVICE START
AUTOMATICALLY
The compressors of both stages are switched off due to
wrong operation.
The temperature control system LH85 was switched too
often by the operating personnel with the key Start/Stop
. The allowed switching frequency of the compressors (5
times per hour). is exceeded. Until the end of the hour the
WARNING CODE 45 is shown.
Attention:
If the last key command was a „Start“, the compressors are
switched on again delayed after this hour. If this is not
required, switch off and on again the unit at the mains
switch..
-46 COMPRESSOR STAGE 2
PRESSURE TO HIGH FOR A
LONG TIME ON LOW
PRESSURE SIDE
The compressor of stage 2 was switched off again
After the delayed switching on of the compressor of stage 2,
the pressure (low pressure side) has fallen below a
determined value after a period of 10 minutes. In order to
avoid the destruction of the compressor, the refrigerant
cycle of stage 2 should be checked by a specialist.
-47 COMPRESSOR STAGE 2 TO
LONG ABOVE HIGH
PRESSURE
The cooling system is surcharged, and the compressor of
stage 2 was switched off.
Before the WARNING CODE 42 is shown for more than two
hours. In order to avoid the destruction of the compressor,
the refrigerant cycle of stage 2 should be checked by a
specialist.
-48 COMPRESSOR STAGE 2 TO
OFTEN SWITCH ON/OFF
Caused by WARNING CODE 43 the compressor of stage 2
has switched off 5 times within one hour.
If after a certain time there was a pressure compensation,
the alarm status can be cancelled by switching off and on at
the mains switch, and the unit is ready to operate again.
In order to avoid the destruction of the compressor, the
refrigerant circuit should first be checked by a specialist.
-49 PRESSURE SENSOR ALARM
LOW PRESSURE SIDE STAGE
2
The pressure sensor of stage 2 (evaporation pressure, low
pressure side) is bypassed or has a line interruption.
Have the repair done by a specialist.
-50 PRESSURE SENSOR ALARM
HIGH PRESSURE SIDE
STAGE 2
The pressure sensor of stage 2 (high pressure side) is
bypassed or has a line interruption.
Have the repair done by a specialist.