Message Possible cause Remedy
0028 W
Air filter h ⇞
Air filter:
Maintenance interval
has elapsed.
Change the air filter.
0029 W
Valve inspection h ⇞
Valves:
Maintenance interval
has elapsed.
Contact KAESER Service.
0030 W
Belt/coupling inspection h ⇞
Belt tension/coupling:
Maintenance interval
has elapsed.
Carry out a visual inspection.
Re-tension the drive belt.
0031 W
Motor bearings h ⇞
Motor bearing of com‐
pressor motor:
Maintenance interval
has elapsed.
Contact KAESER Service.
0032 W
Electrical equipment h ⇞
Electric components and
installation:
Maintenance interval
has elapsed.
Inspect and reset the mainte‐
nance interval counter.
0033 W
Fan bearings h ⇞
Motor bearing of fan mo‐
tors:
Maintenance interval
has elapsed.
Contact KAESER Service.
0034 W
PD temperature ↓
Package discharge (PD)
temperature too low.
Contact KAESER Service.
0035 W
PD temperature ↑
Compressed air dis‐
charge temperature too
high.
Clean the cooler.
Check the cooling oil level.
0036 W
Motor starts/h ⇞
The permissible number
of motor starts was ex‐
ceeded in the last 60 mi‐
nutes.
Extend the idle period.
Increase the capacity of the
air receiver.
Increase the cross-section of
piping between compressor
and air receiver.
0037 W
Motor starts/d ⇞
The permissible number
of motor starts was ex‐
ceeded in the last
24 hours.
Extend the idle period.
Increase the capacity of the
air receiver.
Increase the cross-section of
piping between compressor
and air receiver.
0038 W
Blow-off protection ↑
The safety relief valve's
activating pressure will
soon be reached.
Change the oil separator car‐
tridge.
Open the shut-off valve in the
venting line.
0041 W
Mains voltage ↓
1. Power failure:
The machine is auto‐
matically restarted.
Check power supply.
Check the door interlock
switch.
16 Interpreting warning messages
9_9450 03 USE
Quick user guide Controller
SIGMA CONTROL 2 SCREW FLUID 1.1.3
33
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