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 TABLE l-2. Troubleshooting Chart
Remedy
Possible Cause
Problem
Turn on power.
No power to motor.
Compressor unit
will not start
Repair unloaders.
Unloaders not operating.
Repair or readjust
controls.
Remove obstruction.
Obstruction to rotation.
Readjust control.
Discharge pressure above
Motor
rating.
overheating
Unloader setting incorrect.
Readjust unloader.
Clean or replace filter.
Inlet filter clogged.
Lower discharge pressure.
Overheating of
Discharge pressure above
rating.
compressor
parts
Clean.
Intake filter clogged.
Replace.
Worn or broken valves.
Replace.
Leaking gaskets.
Unloader or control defective.
Replace.
Unloader setting wrong.
Correct.
Compressor components worn or
Replace.
broken.
Cylinder head, intercooler
Clean.
dirty.
Insufficient cooling water.
Increase quantity of
cooling water.
V-belt or coupling misalign-
Realign components.
ment.
Bearings too tight.
Adjust bearings.
Oil level too high.
Correct oil level.
l-8
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