MAINTENANCE & REPAIR 33
COMPRESSOR INSTALLATION & MAINTENANCE / DIAGNOSTICS
TO CHECK CAPACITORS
1. Disconnect the cabinet from the power supply.
2. Make sure the capacitors are discharged before
checking. (Shunt across the terminal of capacitor
with a heavy insulated wire.)
3. Remove the wires from the capacitors.
4. Any capacitor found to be bulging, leading, or
damaged should be replaced.
5. Use a multimeter to check the run and start
capacitors for shorts or open circuits.
With a good capacitor, the indicator should first move
to a reading and then gradually increase to infinity.
If there is no reading change, an open circuit is
indicated.
If the multimeter remains on a low resistance reading,
a short circuit is indicated.
On run capacitor, touch probes to metal case and
each terminal. If meter shows any reading, a ground is
indicated. All defective capacitors should be replaced.
Dipping Cabinet 1298.02 2/3/03 1:14 PM Page 35
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