Message Possible cause Remedy
0013 A
Compressor motor overcurrent
Overload shut-down of the
compressor drive motor.
Investigate cause
of shut-down.
Change the oil
separator car‐
tridge.
0014 A
Oil-/air cooler fan Overcurrent
Overload shut-down of the
second fan motor.
Investigate cause
of shut-down.
Reset the overload
relay.
0015 A
Airend discharge temperature ADT ⇞
Maximum permissible airend
discharge temperature (ADT)
exceeded.
Keep ambient con‐
ditions within
specified limits.
Clean the cooler.
Check the cooling
oil level.
0016 A
Oil-/air cooler fan Overcurrent
Overload shut-down of the
third fan motor.
Investigate cause
of shut-down.
Reset the overload
relay.
0019 A
Internal pressure pi ⇟
– –
0021 A
Refrigeration dryer T ⇟
Refrigeration dryer:
Compressed air temperature
too low.
Contact an author‐
ized KAESER
service representa‐
tive.
0022 A
Oil separator Δp ⇞
Oil separator cartridge clog‐
ged.
Change the oil
separator car‐
tridge.
0023 A
Motor bearings
Drive motor bearings over‐
heated.
Re-grease the mo‐
tor bearings.
0024 A
Water-cooling water shortage
Cooling water pressure is too
low.
Check cooling wa‐
ter supply.
0034 A
Mains contactor on?
Main contactor does not
close.
Check main con‐
tactor and wiring.
0035 A
Cabinet fan I ⇞
Overload shut-down of the
control cabinet fan motor.
Contact an author‐
ized KAESER
service representa‐
tive.
0038 A
PD temperature ⇟
Package discharge (PD) tem‐
perature too low.
Contact an author‐
ized KAESER
service representa‐
tive.
15 Interpreting fault messages
9_9450 03 USE
Quick user guide Controller
SIGMA CONTROL 2 SCREW FLUID 1.1.3
27