Faults 4.2 General faults
Page 30 BOGE Operating instructions for C 10 L...C 20 L series screw compressors
Compressor system does
not start up
No electric power to compressor Check electrical connection
Fuses are defective Check the mains and control fuses, replace if necessary
Machine has not vented
perfectly
Check venting valve and replace, if necessary
Voltage fluctuations in the elec-
trical mains power
Ensure constant voltage in accordance with IEC 38
Compressor oil is very viscous
due to low ambient temperature
Heat up the compressor system (additional heater available as an
option)
Oil in suction filter Minimum pressure non-return
valve is leaking
Check the minimum pressure check valve and replace, if necessary
Suction controller is leaking
Check the suction controller and replace, if necessary
Cut-out performed by emer-
gency-stop button
Cut-out normally via O-key
Excessive oil
consumption
Drain line is blocked Dismantle and clean nozzle with dirt catch
Defective oil separator element Check oil separator and replace, if necessary
Excessive oil filling Drain off oil
Safety valve blows Operating pressure target value
maladjusted
Set operating pressure to maximum permissible pressure of the
screw compressor
Defective safety valve Replace safety valve
System pressure does
not decrease when
switching off
Venting valve does not open Check venting valve and replace, if necessary
Check valve is leaking Check the check valve and replace, if necessary
Fault Possible cause Rectification
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