Working Pressure Too Low; Pressure Relief Valve Blowing Off; Tab. 74 Fault: Working Pressure Too High; Tab. 75 Fault: Working Pressure Too Low - KAESER M135 SIGMA CONTROL MOBIL Service Manual

Tab. 74
9.4.2
Tab. 75
9.4.3
Tab. 76
92
9 Fault Recognition and Rectification
9.4 Compressor faults and alarms
Possible cause
Venting valve does not blow off. Check the connections and func‐
Fault: working pressure too high

Working pressure too low

Possible cause
Proportional controller defective. Have repaired or replaced if nec‐
Inlet valve not opening or only
opening partially.
Pressure gauge giving false
reading.
Pressure relief valve maladjusted
and/or leaking.
Venting valve does not close.
Engine not running at full speed. See chapter 9.3.
Engine air filter and/or compres‐
sor air filter clogged.
Oil separator cartridge heavily
clogged.
Fault: working pressure too low

Pressure relief valve blowing off

Possible cause
Oil separator cartridge heavily
clogged.
Inlet valve not closing.
Pressure relief valve maladjusted
and/or leaking.
Fault: pressure relief valve blowing off
Service Manual Screw Compressor
M135 SIGMA CONTROL MOBIL
Remedy
tion and have repaired or re‐
placed as necessary.
Remedy
essary.
Repair or have replaced if neces‐
sary.
Have repaired or replaced if nec‐
essary.
Have replaced if necessary.
Check the connections and func‐
tion and have repaired or re‐
placed as necessary.
Clean or change, see chap‐
ters 10.4.2 and 10.5.7.
Change, see chapter 10.5.6.
Remedy
Change, see chapter 10.5.6.
Check the controller, the control
air line and the inlet valve and re‐
place if necessary.
Adjust or have replaced if neces‐
sary.
Where can I get help?
Specialised KAESER Ser‐
workshop vice
– X
Where can I get help?
Specialised KAESER Ser‐
workshop vice
– X
– X
– X
– X
– X
– –
– –
– –
Where can I get help?
Specialised KAESER Ser‐
workshop vice
– –
– X
– X
No.: 9_6975 00 E