Section 9, Troubleshooting - Gardner Denver EAQ99T Operating And Service Manual

SECTION 9
TROUBLESHOOTING
SYMPTOM
Compressor fails to start
Compressor starts but
stops after a short time
Compressor does not
unload (or load)
Compressor cycles from
load to unload
excessively
POSSIBLE CAUSE
1. Wrong lead connections.
2. Blown fuses in control
box.
3. Motor starter overload
heaters tripped .
4. Pressure in reservoir.
5. Read error message on
control panel
6. Remote Contact is open
(terminals 6 & 9).
1. High discharge
temperature.
2. High discharge
temperature switch
malfunction.
3. Blown fuse in starter/
control box.
4. Motor starter overload
heaters trip.
1. Improperly adjusted
control.
2. Air leak in control lines.
3. Restricted control line.
4. Blowdown valve
malfunction.
1. Insufficient receiver
capacity.
2. Restriction in service
piping
3. Restriction in control
tubing.
4. Plugged aftercooler.
13-21-602 Page 73
REMEDY
1. Change leads.
2. Replace fuse.
3. Reset and investigate
cause of overload.
4. Inspect blowdown valve.
5. Take appropriate action.
See Manual 13-17-600.
6. Replace switch or jumper.
1. See "High Discharge Air
Temperature," this section.
2. Replace switch
3. Replace fuse (investigate
if fuses continue to blow).
4. Reset and investigate
cause of overload.
1. Refer to Manual 13-17-600
and adjust control.
2. Determine source of leak
and correct.
3. Clean control lines.
4 Repair, clean or replace
valve.
1. Increase receiver size.
2. Inspect and clean service
piping.
3. Inspect and clean control
tubing.
4. Inspect and clean
aftercooler.