Message Possible cause Remedy
error: RS485-PP Wrong configuration or transmis‐
sion error.
Check the link/interface connections be‐
tween the two controllers.
Check maximum cable length and screen‐
ing.
1 master and 1 slave configured.
error: SMS SMS can not be sent. Call KAESER Service.
ext. message 0
ext. message 1
ext. message 2
ext. message 3
ext. message 4
ext. message 5
Customer specific:
Connected component initiates a
maintenance message.
Carry out maintenance on connected com‐
ponent.
FC AI1 fault SFC machine:
Network pressure sensor on AI1 de‐
fective.
Call KAESER Service.
FC MM service SFC machine:
Frequency converter service mode.
Deactivate the service mode as soon as the
frequency converter settings are complet‐
ed.
FC mains SFC machine:
Frequency converter power supply
failed.
Check power supply.
annual maint Last maintenance was 1 year ago. Carry out the necessary maintenance and
reset the corresponding maintenance inter‐
val counter.
no press.buildup The compressor cannot build-up to
working pressure.
Check for air leaks.
Check the value for internal pressure given
in the
<analog data>
menu against the
reading on the oil separator tank pressure
gauge.
comp. T ↓ The airend discharge temperature
(ADT) did not reach the minimum
value within the specified time.
Call KAESER Service.
condensatedrain The condensate drain is defective. Check the condensate drain and drain line.
RD condens.drain Refrigeration dryer:
The condensate drain is defective.
Check the condensate drain.
RD p↑ Refrigeration dryer:
pressure too high in the refrigerant
circuit.
Safety pressure switch tripped.
Clean the refrigerant condenser.
Check the fan motor.
Maintain operating conditions.
RD p↓ Refrigeration dryer:
refrigerant lost; pressure in the re‐
frigerant circuit too low. Inlet pres‐
sure switched tripped.
Call KAESER Service.
9 Fault Recognition and Rectification
9.3 Warning messages (yellow LED lights)
9_5708 08 USE
Service Manual Screw Compressor
BSD
57
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