Ingersoll-Rand 900829, Руководство по обслуживанию

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Electric Standby Mechanical Diagnosis
84
Electric Standby Service Checks
1.Compressor does not run. a.Check for power at source.
b.Check for power at plug.
c.Check for power at compressor contactor.
d.Check for power at overload terminals (contactor
closed).
e.Check for power at motor terminals.
2.Power at compressor terminals but motor does not
run. a.Replace compressor.
3.Compressor hums but does not run. a.Check for locked rotor.
b.Check for worn bearings. Replace if necessary.
c.Check for locked compressor and repair.
d.Check power source for single phasing (on three
phase units).
e.Check capacitors (on single phase units).
f.Check start relay.
4.Check transformer. a.Check for power output.
5.Check rectifier. a.Check for rectifier output.