SECTION 9
TROUBLE SHOOTING
SYMPTOM
POSSIBLE CAUSE
REMEDY
Compressor starts but
stops after a short time.
Compressor does not
unload (or load).
Compressor cycles from
load to unload excessively.
Compressor fails to start. 1.
2.
3,
4.
5.
6,
1.
2.
3.
4.
1.
2,
3.
4,
1.
2.
Wrong lead connections.
Blown fuses in control
box.
Motor starter overload
heaters tripped.
Pressure in reservoir.
Read error message on
control panel.
Remote Contact is open
(terminals 6 & 9).
High discharge temperature.
High discharge
temperature switch
malfunction.
Blown fuse in starter/
control box.
Motor starter overload
heaters trip.
Improperly adjusted
control.
Air leak in control
lines.
Restricted control line.
Blowdown valve malfunction.
Insufficient receiver capacity.
Restriction in control tubing.
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
1.
2.
3.
4.
1.
2.
Change leads.
Replace fuse,
Reset and investigate
cause of overload.
Inspect blowdown valve.
and muffler.
Take appropriate action.
See Section 4.
Replace switch or jumper.
See “High Discharge
Air Temperature,” this
section, page 59.
Replace switch.
Replace fuse
(investigate if fuses
continue to blow).
Reset and investigate
cause of overload.
Refer to Section 4
and adjust control.
Determine source of
leak and correct.
Clean control lines.
Repair, clean or replace
valve.
Increase receiver size.
Inspect and clean control
tubing.
13-9/10-841 Page 58
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