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SYMPTOM
5.
Compressor
1.
does not unload
(or load)
2.
3.
4.
5.
Compressor
1.
cycles from load
to unload
excessively
2.
3.
Compressor
1.
starts too slowly
2.
Compressor is
1,
low on delivery
and pressure
2.
3.
4.
5.
6.
POSSIBLE CAUSE
Compressor lock-up
Improperly adjusted controller
Feed pressure regulator not
adjusted
Feed 3-way solenoid valve
malfunction
Inlet valve stuck
Blow down valve malfunction
Insufficient receiver capacity
Restriction in service piping
Restriction in control tubing
Acceleration time in VFD set too
long
Minimum Pressure/Check Valve
is leaking
Improperly adjusted control
Restricted air filter
Inlet valve not fully open
Minimum pressure valve stuck
closed
Blowdown valve leaking
Air demand exceeds supply
13-18-609
REMEDY
5.
Confirm compressor shaft is not free to
turn. Contact GD for further
instructions.
1.
Refer to Manual 13-17-600 and adjust
control.
2.
Inspect, adjust and replace pressure
regulator.
3.
Repair, clean or replace valve.
4.
Inspect and replace valve.
5.
Repair, clean or replace valve.
1.
Increase receiver size
2.
Inspect and clean service piping.
3.
Inspect and clean control tubing.
1.
Contact your Gardner Denver
distributor.
2.
Repair or replace.
1.
Refer to Manual 13-17-600 and adjust
control.
2.
Clean or replace filter element.
3.
Inspect, adjust or replace feed solenoid
valve and/or pressure regulator.
4.
Inspect service or replace valve.
5.
Inspect or replace solenoid valve.
Ensure local ambient temperature has
not exceeded 113°F. limit.
6.
Make sure air demand matches
compressor specifications for flow and
pressure.
Page 81
15-2
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