Message
Possible cause
Remedy
0022 A
Oil separator Δp ⇞
Oil separator cartridge clogged.
Replace the oil separator car‐
tridge.
0032 A
Oil pressure ⇞
Cooling oil temperature too low,
resulting in highly viscous cooling
oil.
Residue within the cooling oil
lines.
Keep ambient conditions within
specified limits.
Contact an authorised service
partner.
0033 A
Oil pressure ⇟
Oil level too low.
Defective oil pump (vacuum ma‐
chines only).
Check the cooling oil level.
If necessary, have pump replaced
by an authorised service partner.
0034 A
Mains contactor on?
Compressor motor mains contac‐
tor not switching on.
Check mains contactor and wiring.
0035 A
Cabinet fan I ⇞
Overload shutdown of control cab‐
inet fan motor.
Contact an authorised service
partner.
0038 A
PD temperature ⇟
Compressed air discharge tem‐
perature too low.
Contact an authorised service
partner.
0039 A
PD temperature ⇞
Compressed air discharge tem‐
perature too high.
Check the cooling oil level.
Clean the cooler.
Check the fan motor.
0040 A
Mains contactor off?
Compressor motor mains contac‐
tor not switching off.
Check mains contactor and wiring.
0041 A
Mains voltage ⇟
Second voltage drop.
Check the supply voltage.
Check the door limit switch.
0042 A
Back pressure stop
Back pressure in oil separator
tank due to defective venting.
Check the venting line.
0043 A
Airend discharge
temperature ADT rise
dT/dt ⇞
Permissible rate of rise for airend
discharge temperature (ADT) ex‐
ceeded.
Check the cooling oil level.
0044 A
No pressure buildup
Machine does not produce com‐
pressed air.
Gauge working pressure does not
rise above 3.5 bar within a speci‐
fied time period.
Machine does not go into LOAD
Minimum pressure/check valve
defective.
Check the machine for leaks.
Check coupling and V-belt.
Contact an authorised service
partner.
0048 A
High-voltage cell
High-voltage cell alarm.
Contact an authorised service
partner.
0050 A
Customer-provided power
element
Power switching not ready or faul‐
ty.
Check the power switching.
0051 A
Aggregate A
Unit A failed.
Contact an authorised service
partner.
10 Fault Recognition and Rectification
10.2 Interpreting alarm messages
No.: 9_9450 12 E
User Manual Controller
SIGMA CONTROL 2 SCREW FLUID ≥5.0.X
199