PSC-QS (10/16)
Page 46
If the compressor draws a high amperage and does not start (amperage is approximately
locked rotor amperage
– LRA (See Figure 7)), the compressor is locked mechanically and
should be removed from the system and replaced. Verify before removing!
7. Motor Circuit Testing
Using a digital volt-ohmmeter (VOM), measure the resistance across the compressor
windings terminals as shown in Figure 33. The power leads to the compressor must be
disconnected before taking an electrical measurement. A good rule of thumb for single
phase compressors is that start winding resistance (R
2
) is 3 to 5 times greater than run
winding resistance (R
1
).
Figure 33. Compressor Motor Circuit Testing
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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