Message Possible cause Remedy
0014 W
External message 1
1)
0015 W
Com-Module
communication error
The bus link via Com module inter‐
face is interrupted.
Check bus conduits and plug.
0016 W
T3 ↓
Oil temperature T3 too low Check ambient conditions.
0017W
T3 ↑
Oil temperature T3 too high (only
when used in screw blowers) → oil
temperature
Check the operating conditions
(max. speed/pressure)
Ambient temperature too high
Cooling air feed clogged
Check the direction of rotation for
the sound enclosure fan.
Call KAESER SERVICE.
0018W
π=p2_a/p1_a ↑
Pressure ratio across the block is
too high - warning.
Inlet conditions (pressure) or back
pressure is too high.
Check filter.
Check the position of the process
valves.
0019W
T1 ↓
Inlet temperature too low – warning. Check the inlet conditions (pipe,
room)
Check the climatic conditions in the
machine environment
0020W
T_M ↑
Compressor drive motor overhea‐
ted.
Keep ambient conditions within
specified limits.
Check the cooling air supply.
Clean the motor.
0021W
p1 ↓
Inlet pressure too low – warning. Check the inlet conditions (pipe,
room)
Check the position of the process
valves.
Severe clogging of the inlet louvre.
0022W
Motor starts ↑
Max. switching frequency / h excee‐
ded.
Check the operating conditions
and/or operating mode.
0023W
FC error %d
The numerical value is the fault
code of the frequency converter.
Call KAESER SERVICE.
0024W
FC service mode
activated
FC in service mode Deactivate the service mode in
menu 10.1.1.2
0025W
Test of cut-of paths
required
STO channels must be tested. Switch off the FC.
0026W
Machine test
measurement of block
speed active
The test operation is active. Conclude the test operation.
10 Fault Recognition and Rectification
10.3 Interpreting warning messages
No.: 901700 10 E
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 2.5.3
157
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