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13-25-629 v03 Page 67
SECTION 12
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSE
REMEDY
Compressor fails to start
1.
No electrical power.
1.
Check main disconnect, fuses
and supply line.
2.
Motor starter overload
relay tripped.
2.
Reset and investigate cause of
overload.
3.
Pressure in reservoir.
3.
Inspect unload valve.
4.
Wrong lead connections
4.
Change leads.
5.
Emergency stop
depressed.
5.
Release button.
6.
Unacknowledged fault
4.
Clear fault at controller
Compressor starts but
stops after a short time
1.
High separator/ high
compressor temperature
shutdown event
1.
See “High Discharge Air
Temperature,” this section.
2.
Blown fuse in starter/
control box.
2.
Replace fuse (investigate if
fuses continue to blow).
3.
Motor starter overload
relay tripped.
3.
Reset and investigate cause of
overload.
4.
Fast pressure buildup due
to open inlet valve
4.
Inspect inlet valve and
unloader valve operation.
Replace if faulty.
5.
High oil viscosity
5.
Review oil type for ambient
temperature or provide site
heating.
Compressor does not
unload (or load)
1.
Improperly adjusted
control.
1.
Refer to Control Manual and
adjust control.
2.
Faulty inlet valve or
unloaded valve solenoid.
4
Inspect and/or replace faulty
component.
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.
Pressure range too
narrow.
3.
Extend pressure range.
Compressor starts too
slowly
1.
Minimum Pressure Valve
is faulty.
1.
Inspect and/or replace.
2.
Supply voltage is too low.
2.
Check the supply voltage.
Compressor does not
reach load pressure
1.
Restricted air filter.
1.
Clean or replace filter.
2.
Partially open inlet valve.
2.
Inspect, clean or replace inlet
valve.
Summary of Contents for L4-5C
Page 27: ...13 25 629 v03 Page 27 FIGURE 4 5 WIRING DIAGRAM 380V 60 Hz 303ECA546 B Ref Drawing Page 1 of 3...
Page 28: ...13 25 629 v03 Page 28 FIGURE 4 6 WIRING DIAGRAM 380V 60 Hz 303ECA546 B Ref Drawing Page 2 of 3...
Page 29: ...13 25 629 v03 Page 29 FIGURE 4 7 WIRING DIAGRAM 380V 60 Hz 303ECA546 B Ref Drawing Page 3 of 3...
Page 30: ...13 25 629 v03 Page 30 FIGURE 4 8 WIRING DIAGRAM 575V 305ECA546 A Ref Drawing Page 1 of 3...
Page 31: ...13 25 629 v03 Page 31 FIGURE 4 9 WIRING DIAGRAM 575V 305ECA546 A Ref Drawing Page 2 of 3...
Page 32: ...13 25 629 v03 Page 32 FIGURE 4 10 WIRING DIAGRAM 575V 305ECA546 A Ref Drawing Page 3 of 3...
Page 61: ...13 25 629 v03 Page 61 Figure 9 5 Compressor Module Hardware...