13-8-639 Page 65
SECTION 9
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSE
REMEDY
Compressor fails to start
1.
Wrong lead connections.
1.
Change leads.
2.
Blown fuses in control
box.
2.
Replace fuse.
3.
Plant pressure higher than
pressure setting in
controller.
3.
Wait for plant pressure to
drop below load pressure.
4.
Main motor overloaded
4.
Test motor thermistors.
Check the temperature
and volume of cooling air
at the inlet.
5.
Pressure in reservoir
5.
Inspect blowdown valve.
6. Emergency
Stop
depressed.
6. Release
button
7.
Compressor stopped due
to high temperature
shutdown.
7.
See "High Discharge Air
Temperature," this
section.
Compressor starts but
stops after a short time
1.
High discharge
temperature.
1.
See “High Discharge Air
Temperature,” this
section.
2.
High separator/ high
compressor temperature
light flashing.
2.
See page 38, Controller
Alarms.
3.
Blown fuse in starter/
control box.
3.
Replace fuse (investigate
if fuses continue to blow).
4.
Motor starter overload
heaters or thermistor in
motor tripped..
4.
Reset and investigate
cause of overload.
5. Compressor
stopped
because of high discharge
pressure.
5. See
"High
Discharge
Pressure," this section.
Compressor does not
unload (or load)
1.
Improperly adjusted
control.
1.
Refer to Section 4, USER
MENU page 30 and
adjust control.
2.
Air leak in control lines.
2.
Determine source of leak
and correct.
3.
Restricted control line.
3.
Clean control lines.
4.
Faulty inlet valve solenoid.
4
Replace solenoid valve.
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