PSC-QS (10/16)
Page 47
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.
Summary of Contents for Prime Series
Page 15: ...PSC QS 10 16 Page 15 Figure 8a PSC Compressor Electrical Schematic 230 1 60...
Page 16: ...PSC QS 10 16 Page 16 Figure 8b PSC Compressor Unit Electrical Schematic 230 3 60...
Page 17: ...PSC QS 10 16 Page 17 Figure 9 PSC Air Heating Cooling System Application...
Page 18: ...PSC QS 10 16 Page 18 Figure 10 PSC Air Heating Cooling System Field Wiring Diagram...
Page 26: ...PSC QS 10 16 Page 26 Figure 14 Disassembled Plug Connector...
Page 33: ...PSC QS 10 16 Page 33 Figure 23 PSC Internal Flow Schematic...
Page 34: ...PSC QS 10 16 Page 34 Figure 24 PSC Piping...
Page 36: ...PSC QS 10 16 Page 36 Figure 25 Evacuation of PSC System...
Page 38: ...PSC QS 10 16 Page 38 Figure 26 Initial Charge of PSC System...
Page 40: ...PSC QS 10 16 Page 40 Figure 27 Final Charge of PSC System...
Page 43: ...PSC QS 10 16 Page 43 Figure 31 Start Up Process...
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