RESTARTING A “STUCK ” PSC COMPRESSOR PROCEDURE

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StepExpected Result/Action
Turn power off. Use the capacitor discharge tool (Figure SP-8-6) to discharge
citor and any other capacitors in the unit. Locate the wiring
the run capacitor. {Refer to the unit wiring diagram.)
Compressor leads connected to the run capacitor terminal are identified.
22. Connect the temporary start capacitor, two jumper wires with insulated
alligator dips, and an insulated screwdriver to one terminal of the run
capacitor as shown in Figure SP-9-21, View A.
NOTE: Always wear safety glasses when performing this procedure. For added
protection against a possible rupture, shield the start capacitor in an
enclosure.
Temporary start capacitor and other test equipment connected in preparation for
starting the compressor.
23. Turn power on and simultaneously touch the screwdriver or probe to the
other terminal of the run capacitor as shown in Figure SP-9-21, View B. Pull
the screwdriver away from the terminal after a maximum of 3 seconds.
Discharge the temporary start capacitor.
Compressor starts as a result of the capacitance boost.
Run the compressor for about 10 minutes, then turn off power to the compressor.
Let the compressor sit idle for about 5 minutes to allow time for the system
pressures to equalize, then proceed to step 24.
24. Try restarting the compressor without the temporary start (boost) capacitor.If the compressor will not start without a temporary boost, install a permanent
start capacitor and start relay supplied in a manufacturer's recommended start
kit.

pic1 13 RESTARTING A STUCK  PSC COMPRESSOR PROCEDURE

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