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13-21-602 Page 73
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.
Motor starter overload
heaters tripped .
3.
Reset and investigate
cause of overload.
4.
Pressure in reservoir.
4.
Inspect blowdown valve.
5.
Read error message on
control panel
5.
Take appropriate action.
See Manual 13-17-600.
6.
Remote Contact is open
(terminals 6 & 9).
6.
Replace switch or jumper.
Compressor starts but
stops after a short time
1.
High discharge
temperature.
1.
See “High Discharge Air
Temperature,” this section.
2.
High discharge
temperature switch
malfunction.
2.
Replace switch
3.
Blown fuse in starter/
control box.
3.
Replace fuse (investigate
if fuses continue to blow).
4.
Motor starter overload
heaters trip.
4.
Reset and investigate
cause of overload.
Compressor does not
unload (or load)
1.
Improperly adjusted
control.
1.
Refer to Manual 13-17-600
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.
Blowdown valve
malfunction.
4
Repair, clean or replace
valve.
Compressor cycles from
load to unload
excessively
1.
Insufficient receiver
capacity.
1.
Increase receiver size.
2.
Restriction in service
piping
2.
Inspect and clean service
piping.
3.
Restriction in control
tubing.
3.
Inspect and clean control
tubing.
4.
Plugged aftercooler.
4.
Inspect and clean
aftercooler.
Summary of Contents for EAQ99T
Page 13: ...13 21 602 Page 12 Figure 1 6 AIR OIL FLOW DIAGRAM 202EDM797 Ref Drawing...
Page 45: ...13 21 602 Page 44 Figure 4 14 WIRING DIAGRAM WYE DELTA 328EAQ546 A Ref Drawing Page 1 of 2...
Page 46: ...13 21 602 Page 45 328EAQ546 A Ref Drawing Page 2 of 2...
Page 47: ...13 21 602 Page 46 Figure 4 15 WIRING DIAGRAM LESS STARTER 330EAQ546 A Ref Drawing Page 1 of 2...
Page 48: ...13 21 602 Page 47 330EAQ546 A Ref Drawing Page 2 of 2...
Page 52: ...13 21 602 Page 51 Figure 5 3 FLOW DIAGRAM AIR OIL SYSTEM 203EDM797 A Ref Drawing...
Page 77: ......