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9.4 Analysing compressor faults and alarms
9.4.1 Working pressure too high
Possible cause Remedy Where can I get help?
SW
KS
SW = specialised workshop; KS = KAESER SERVICE
Proportional controller defective. Have repaired or replaced if
necessary.
– X
Inlet valve does not close. Check the controller, the control
air line and the inlet valve and
replace if necessary.
– X
Pressure gauge indicating false
pressure.
Have repaired or replaced if
necessary.
– X
Venting valve does not blow off. Check the connections and
function and have repaired or
replaced as necessary.
– X
Tab. 61 Fault: working pressure too high
9.4.2 Working pressure too low.
Possible cause Remedy Where can I get help?
SW
KS
Proportional controller defective. Have repaired or replaced if
necessary.
– X
Inlet valve not opening or only
opening partially.
Repair or have replaced if nec‐
essary.
– X
Pressure gauge indicating false
pressure.
Have repaired or replaced if
necessary.
– X
Pressure relief valve maladjus‐
ted and/or leaking.
Have repaired or replaced if
necessary.
– X
Venting valve does not close. Check the connections and
function and have repaired or
replaced as necessary.
– X
Engine does not run at maxi‐
mum speed (in LOAD mode).
See chapter 9.3 X X
Engine air filter and/or compres‐
sor air filter clogged.
Clean or change, see chap‐
ters 10.4.2 and 10.5.7.
– –
Oil separator cartridge heavily
clogged.
Change, see chapter 10.5.6. – –
SW = specialised workshop; KS = KAESER SERVICE
Tab. 62 Fault: working pressure too low
9 Fault Recognition and Rectification
9.4 Analysing compressor faults and alarms
No.: 9_9570 07 USE
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
101