EarthLinked SCWD-024-1C, Quick Start Instructions

Page: 52 / 62

SCWD-QS (12/16) Page 52
8. Grounded Windings
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 34. A short circuit at a high voltage
terminal indicates a motor defect (grounded).
Figure 34. Compressor Motor Grounded Winding Test
9. Compressor not pumping.
Connect gauge block hoses to the suction and discharge pressure ports in the
compressor unit. Read pressure gauges to affirm that system is pressurized with
refrigerant. Turn on power to compressor unit and run unit. Observe pressure gauges. If
pressures on both gauges remain the same, compressor is not pumping and there is a
possible internal failure. See System Troubleshooting Chart.