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9.4.2 Working pressure too low
Possible cause
Measure
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 it replaced if
necessary.
–
X
Pressure gauge indicating incor‐
rect reading.
Have it repaired or replaced if
necessary.
–
X
Safety valve maladjusted and/or
leaking.
Have it repaired or replaced if
necessary.
–
X
Venting valve blowing off.
Check the connections and
function and have it repaired or
replaced as necessary.
–
X
Engine does not run at maxi‐
mum speed (in LOAD mode).
X
X
Engine air filter and/or compres‐
sor air filter clogged.
Clean or change, see chap‐
–
–
Oil separator cartridge heavily
clogged.
Change, see chapter 10.6.6.
–
–
SW = Specialised workshop; KS = KAESER SERVICE
Tab. 83 Fault: working pressure too low
9.4.3 Safety valve blows off
Possible cause
Measure
Where can I get help?
SW
KS
Oil separator cartridge heavily
clogged.
Change, see chapter 10.6.6.
–
–
Inlet valve does not close.
Check the controller, control line
and inlet valve and replace if
necessary.
–
X
Safety valve maladjusted and/or
leaking.
Adjust or have it replaced if nec‐
essary.
–
X
SW = Specialised workshop; KS = KAESER SERVICE
Tab. 84 Fault: safety valve blowing off
9.4.4 Machine overheating
Possible cause
Measure
Where can I get help?
SW
KS
Defective cooling fan.
Have the blades or the complete
fan wheel replaced.
–
X
SW = Specialised workshop; KS = KAESER SERVICE
9
Fault Recognition and Rectification
9.4
Analysing compressor faults and alarms
106
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M82 SIGMA CONTROL SMART
No.: 901783 08 USE