9.4.3 Safety relief valve blows off
Possible cause
Remedy
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 relief valve maladjusted
and/or leaking.
Adjust or have it replaced if nec‐
essary.
–
X
SW = Specialized workshop; KS = KAESER SERVICE
Tab. 63 Fault: safety relief valve blowing off
9.4.4 Machine overheating
Possible cause
Remedy
Where can I get help?
SW
KS
Defective cooling fan.
Have the blades or the complete
fan wheel replaced.
–
X
Oil cooler surface clogged.
Clean surface, see chap‐
–
–
The working element of the ther‐
mostatic valve not working.
Have it repaired or replaced if
necessary.
–
X
Working pressure too high (pro‐
portional controller maladjus‐
ted).
Reset to the permissible value
or have it replaced.
–
X
Oil separator cartridge heavily
clogged.
Measure the pressure differen‐
tial and change the cartridge if
greater than 14.5 psi. Change,
–
X
Compressor oil filter cartridge
clogged.
Change, see chapter 10.6.4.
–
–
Compressor cooling oil level too
low.
Replenish, see chapter 10.6.2.
–
–
Oil pipes leaking.
Seal leaks or have pipes
changed.
X
X
Engine cooling system or cool‐
ing fan defective.
Have repaired.
X
X
Ambient temperature too high.
See installation conditions in
–
–
SW = Specialized workshop; KS = KAESER SERVICE
Tab. 64 Fault: machine overheating
9
Fault Recognition and Rectification
9.4
Analyzing compressor faults and alarms
90
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M55 PE SIGMA CONTROL SMART pV
No.: 902366 10 USE
