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8-10
TROUBLESHOOTING
Symptom: Compressor oil pressure low (check gages)
See Section 7, for compressor oil pressure requirements.
Oil diluted with refrigerant
Oil pressure regulating valve out of adjustment
Compressor rotation incorrect
Restriction strainer, oil filter, pick-up tube or
oil passage
Compressor thrust bearing installed upside
down
Symptom: Compressor loosing oil excessively
Non-effective oil separator or float
Liquid refrigerant in crankcase
Compressor piston rings seized or broken
Leaking shaft seal
12/17/12
Possible Cause
Possible Cause
Possible Remedy
Oil will be very foamy. Check liquid feed
control for overfeed problem.
Adjust valve to increase oil pressure. Turn
stem in to increase, out to decrease.
Check rotation direction by arrow indication.
Reverse rotation, if necessary.
Clean strainer or restriction in passage or
replace filter.
The Mycom compressor thrust bearing on the
shaft seal end has an oil passage hole which
has to be in the proper position when installing
the thrust bearing.
Hole up for "WA" and
"WB" series Mycom compressor.
your compressor manual.
Possible Remedy
The oil separator will normally return a good
portion of oil leaving the compressor, if it is
working properly.
Check the oil float and
return line to see it is not restricted.
Check liquid feed to make sure it is not
overfeeding and that the solenoid valve #20 is
not leaking through when the machine is
stopped.
Check compressor efficiency. If rings are
seized or broken, replace defective parts.
A few drops per minute is okay. If ammonia is
leaking, replace the seal.
P24A & P34A Service Manual
Refer to
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