9 Fault Recognition and Rectification
9.1 Basic instructions
There are 3 types of fault:
■ Warning:
─ Warning messages
W
■ Fault (with indication):
─ Alarm messages
A
─ System messages
Y
─ Diagnostic messages
D
■ Other faults (without indication): See chapter 9.2
The messages valid for your machine are dependent on how the individual machine is equipped.
1. Do not attempt fault rectification measures other than those given in this manual!
2. In all other cases:
Have the fault rectified by an authorized KAESER service representative.
Further information Detailed information for the various messages can be found in the service manual
SIGMA CONTROL 2 .
9.2 Other faults
Alarm Possible cause Remedy
Machine runs but produces no
compressed gas.
Inlet valve not opening or only
opening partially.
Contact KAESERservice.
Venting valve not closing. Contact KAESERservice.
Pressure system leaking. Check pipework and connec‐
tions for leaks and tighten any
loose fittings.
Gas demand exceeds the deliv‐
ery capacity of the compressor.
Check the gas network for
leaks.
Shut down the consumer(s).
Hose coupling or maintenance
hose still plugged into the
quick-release coupling on the
oil separator tank.
Remove coupling or mainte‐
nance hose.
Inlet valve defective. Contact KAESERservice.
Compressor switches between
LOAD into STANDSTILL more
than twice per minute.
Gas receiver too small. Increase size of receiver.
Flow into the gas network is re‐
stricted.
Increase gas pipe diameter.
Check filter elements.
The differential between cut-in
and cut-out pressure is too
small.
Check switching differential.
9 Fault Recognition and Rectification
9.1 Basic instructions
ESD_2C_10357405_10–LIN_00 E
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2
53
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