Message Possible cause Remedy
0004 A
Mains contactor
feedback signal
Mains contactor does not
pull in.
Mains contactor welded.
Reset spring at the mains
contactor defective.
Feedback contact defec‐
tive.
I/O wiring defective.
Call KAESER SERVICE.
0005 A
Motor stop
Fault in drive system. Check drive motor and belt drive.
0006 A
Phase error blower
motor
Electric feed has incorrect
phase sequence.
Ensure right-hand rotation.
Check presence of all three phases.
0007 A
Vibration alarm
Vibration Check the removal of the transport securing
device.
Check the vibration isolation of the connect‐
ing line.
Call KAESER SERVICE.
0008 A
Oil level side A
Lubricant level at the blow‐
er block drive side too low.
Replenish with lubricating oil.
0009 A
p1 ⇟
Inlet pressure too low.
Inlet filter clogged.
Check operating conditions.
Check all feed lines, the inlet silencer at the
blower block and the inlet filter.
0010 A
p2 ⇞
Discharge pressure too
high.
Check operating conditions.
Check all discharge lines, the discharge si‐
lencer and the blower block.
0011 A
dp ⇞
Differential pressure too
high.
Check operating conditions.
Check all feed lines, discharge lines, the in‐
let and the discharge silencers and the
blower block.
0012 A
T2 ⇞
Discharge temperature too
high.
Check ambient conditions.
Check the sound enclosure fan function.
0013 A
T_S ⇞
Sound enclosure tempera‐
ture too high.
Keep ambient conditions within specified
limits.
Check the sound enclosure fan function.
0014 A
T_S ⇟
Sound enclosure tempera‐
ture too low.
Check function of the machine heating sys‐
tem.
Keep ambient conditions within specified
limits.
0015 A
T1 ⇞
Inlet temperature too high. Check operating conditions.
Check all feed lines, the inlet silencer and
the blower block.
Check ambient conditions.
0016 A
T_M ⇞
Drive motor temperature is
too high.
Check the ambient and operating condi‐
tions.
10 Fault Recognition and Rectification
10.2 Interpreting fault messages
152
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 2.5.3 No.: 901700 10 E
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