Gardner Denver VST110 Operating And Service Manual page 79

SYMPTOM
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.
POSSIBLE CAUSE
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
Air leaks in service piping
13-17-605 Page 78
REMEDY
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 temp has not
exceeded 113°F. limit.