13–9/10–641 Page 49
SECTION 9
TROUBLE SHOOTING
SYMPTOM
POSSIBLE CAUSE
REMEDY
Compressor fails to start.
1.
Wrong lead connections.
1.
Change leads.
2.
Blown fuses in control
2.
Replace fuse.
box.
3.
Motor starter overload
3. Reset and investigate
heaters tripped.
cause of overload.
4.
Pressure in reservoir.
4.
Inspect blowdown valve.
and muffler.
5.
Read error message on
5.
Take appropriate action.
control panel.
See Manual 13–9/10–647.
6.
Remote Contact is open
6.
Replace switch or jumper.
(terminals 6 & 9).
Compressor starts but
1.
High discharge temperature.
1.
See “High Discharge
stops after a short time.
Air Temperature,” this
section, page 50.
2.
High discharge
2.
Replace switch.
temperature
switch
malfunction.
3.
Blown fuse in starter/
3.
Replace fuse
control box.
(investigate if fuses
continue to blow).
4.
Motor starter overload
4.
Reset and investigate
heaters trip.
cause of overload.
Compressor does not
1.
Improperly adjusted
1.
Refer to Manual 13–9/10–647
unload (or load).
control.
and adjust control.
2.
Air leak in control
2.
Determine source of
lines.
leak and correct.
3.
Restricted control line.
3.
Clean control lines.
4.
Blowdown valve malfunction.
4.
Repair, clean or replace
valve.
Compressor cycles from
1.
Insufficient receiver capacity.
1.
Increase receiver size.
load to unload excessively.
2.
Restriction in control tubing.
2.
Inspect and clean control
tubing.
