Table of Contents
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Problem
Compressor loses oil
Compressor thermal protector switch
open
Notes:
Possible Cause
Lack of refrigerant
Excessive compression ring blow-by
Refrigerant flood back
Improper piping or traps
Operating beyond design
Discharge valve partially shut
Dirty condenser coil
Overcharged system
Corrective Action
Locate and repair leak, recover,
evacuate and recharge
Replace compressor
Maintain proper superheat at
compressor
Correct piping
Add facilities so that operating
conditions are within allowable limits
Open valve
Clean coil
Correct charge
26
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