Event Recognition and Fault Rectification
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Message RemedyPossible cause
blowoff prot. Warning
The blowoff pressure of the
pressure relief valve will
soon be reached.
Change the oil separator
cartridge.
Open the shut–off valve in
the venting line.
blt.coup.insp.h
The maintenance interval
for V–belt tension / coupling
inspection has expired.
Visually inspect and tension
the V–belts.
blt.coup.chng. h
V–belts / coupling worn. Change belts / coupling.
Buffer battery Battery for retention of data
is discharged.
Replace the battery
bus alarm Bus link via Profibus DP in-
terface interrupted
Check bus highway and
plug.
Condensate drain Fault in condensate drain-
age.
Check condensate drain
and lines.
elect. equip. h
The service interval for
checking electrical equip-
ment and installation has
expired.
Reset the service interval
counter.
error: RS 485 Wrong configuration or
transmission error.
Check the link/interface
connections between the
two controllers.
Check maximum cable
length and screening.
1 master and 1 slave confi-
gured.
ext.load signal? Dubious external load sig-
nal
Increased cut–out pressure
exceeded.
The external load control
has not switched to idle (off
load).
Check settings of the exter-
nal controller.
Take the pressure drops
across filters and dryer into
account.
ext. message 0 Customer specific:
No data
ext. message 5
flash memory Internal controller memory
error.
Contact KAESER service.
FC mains Failure of power supply to
the frequency converter.
Check power supply.
mains voltage
1. power failure:
Machine was re–started
automatically.
Check power supply volt-
age.
Check door interlock.
modem problem SIGMA CONTROL does not
recognise the modem.
Check the link between
SIGMA control and the
modem.
motor T
Drive motor overheating. Ensure adequate ventila-
tion.
Install an extractor.
Clean the motor.