18
Troubleshooting Chart (cont’d)
Symptom
Possible Cause(s)
Corrective Action
Air escapes from centrifugal unloader
when unit is running.
1.
Centrifugal unloader release valve
dirty or defective.
1.
Clean or replace valve.
Air escapes from centrifugal unloader
when unit is stopped.
1.
Check valve stuck in open position.
1.
Replace check valve.
Warning –
Relieve tank pressure
before
servicing.
System does not alternate
(Duplex units only)
1. Starter
tripped.
2.
Loose wiring in alternator.
3. Defective
alternator.
4. Defective
motor.
1.
Reset starter. If starter trips
repeatedly, have electrical system
inspected by an electrician.
2.
Check and tighten all wiring
connections.
3. Replace
alternator.
4. Replace
motor.
