Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
42
Table 8.1
Troubleshooting Chart
Symptom
Possible Cause
Corrective Action
unable to reach cut-out
pressure.
compressor pump
capacity.
2.
Air leaks.
3.
Blocked or dirty inlet air
filters.
4.
Loose engine or motor
pulley, loose compressor
pump pulley, or loose /
worn V-belts.
5.
Head unloaders not fully
retracting (usually
indicated by air blowing
out from air filter inlets).
6.
Damaged or worn
compressor pump valves
or blown cylinder head
gaskets.
7.
Damaged or worn piston
rings, pistons or cylinders.
8.
Faulty non-return valve.
larger or additional
compressor(s).
2.
Tighten, refit or replace
leaking connections or
components.
3.
Clean or replace air filter
elements.
4.
Tighten or replace pulleys
as required, check
alignment and adjust V-
belt tension.
5.
Repair or replace head
unloaders.
6.
Replace compressor pump
valves or cylinder head
gaskets.
7.
Replace components or
entire compressor pump.
8.
Repair or replace non-
return valve.
Compressor pump runs
excessively hot (and possibly
melts air filter enclosures).
1.
Incorrect direction of
rotation.
2.
Ambient temperature too
high or insufficient
ventilation.
3.
Low oil level.
4.
Excessive duty cycle.
5.
Damaged or worn
compressor pump valves
or blown cylinder head
gaskets.
1.
Check compressor pulley
turns anti-clockwise
(looking onto pulley).
Change electric motor
connections if incorrect.
2.
Reduce ambient
temperature or improve
ventilation (e.g. move
further away from walls or
other equipment).
3.
Add oil.
4.
Reduce air demand or use
larger or additional
compressor(s).
5.
Replace compressor pump
valves or cylinder head
gaskets.
Excessive duty cycle (> 75%
loading ratio or continuous
loading times > 10 minutes).
1.
Air demand is too high.
2.
Air leaks.
1.
Reduce air demand or use
larger or additional
compressor(s).
2.
Tighten, refit or replace
leaking connections or
components.
Excessive cycling between
1.
Maximum cycling occurs
1.
Nil (no fault). Cycling will
