12
Compressor replacement
1. Remove all access panels.
2. Confirm that the problem is not external to the compressor
(electrical) before proceeding. If the compressor does not
start/run, check the following:
A. Is proper voltage present at the
compressor terminals?
B. Are all starting devices (capacitors,
potential relays) good?
Disconnect the unit from line voltage
C. Are the motor windings known to be
good or bad? If in doubt, Ohmmeter
readings of the windings may be compared
to the replacement compressor.
3. Recover the system refrigerant.
4. Disconnect wires, starting devices, etc. from compressor.
5. Remove valve cores from both Shrader valves.
6. Remove the coil from the solenoid valve and move it out of
the torch area. Wrap a damp rag around the solenoid valve
body.
7. Unsolder and remove compressor and dryer.
NOTE: If a compressor burnout is suspected, invert old
compressor and drain out a small sample of oil. Test the oil
for acidity, following the manufacturer’s recommendations on
the acid test kit. If the oil is acidic, the refrigeration system will
need flushing to remove the acidic oil. Replace with new oil.
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