Table of Contents
Advertisement
Test the compressor motor for a grounded winding. The check should be made using an
ohmmeter capable of measuring very high resistance on a VOM. The resistance
between windings and the housing is one million to three million ohms for an
ungrounded winding.
Attach one lead to the compressor case on a bare metal tube or ground terminal, and to
each compressor terminal as shown in Figure 35. A short circuit at a high voltage
terminal indicates a motor defect (grounded).
9.
Compressor not pumping.
Connect gage block hoses to the suction and discharge pressure ports in the
compressor unit. Read pressure gages to affirm that system is pressurized with
refrigerant. Turn on power to compressor unit and run unit. Observe pressure gages. If
pressures on both gages remain the same, compressor is not pumping and there is a
possible internal failure. See System Troubleshooting Chart.
PSD-QS (02/16)
Figure 35. Compressor Motor Grounded Winding Test
Page 48
Advertisement
Table of Contents
