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PROBLEM
POSSIBLE CAUSE
Lubricant viscosity too high.
Improper line voltage.
Wiring or electric service panel too small.
Poor contact on motor terminals or starter
connections.
Improper starter overload heaters.
Poor power regulation (unbalanced line).
Drive belts too tight or misaligned.
Compressor valves leaky, broken, carbonized or
Motor overload trips
loose.
or draws excessive
current
Cylinder(s) or piston(s) scratched, worn or
scored.
Connecting rod, piston pin or crankpin bearings
worn or scored.
Defective ball bearings on crankshaft or motor
shaft.
Leaking check valve or check valve seat blown
out.
Ambient temperature too low.
Bad motor.
Improper line voltage.
Wiring or electric service panel too small.
Motor will not start
Poor contact on motor terminals or starter
connections.
Improper starter overload heaters.
Bad motor.
Lubricant viscosity too low.
Detergent type lubricant being used.
Piston rings damaged or worn (broken, rough or
scratched). Excessive end gap or side clearance.
Oil in discharge air (oil
Piston rings not seated, are stuck in grooves or
pumping)
end gaps not staggered.
Cylinder(s) or piston(s) scratched, worn or
scored.
Worn cylinder finish.
Excessive condensate in receiver tank.
Oil leaking from shaft
Crankshaft seal worn or crankshaft scored.
seal
Clogged or dirty inlet and/or discharge line filter. Clean or replace.
Safety/relief valve
Compressor valves leaky, broken, carbonized or
"pops"
loose.
Defective safety/relief valve.
80444425 Rev. D
POSSIBLE SOLUTION
Drain existing lubricant and refill with proper lubricant.
Check line voltage and upgrade lines as required. Contact
electrician.
Install properly sized wire or service box. Contact electrician.
Ensure good contact on motor terminals or starter
connections.
Install proper starter overload heaters. Contact electrician.
Contact power company.
Adjust belts to proper tension and alignment.
Inspect valves. Clean or replace as required. Install valve kit.
Repair or replace as required.
Inspect all. Repair or replace as required.
Inspect bearings and replace crankshaft assembly if
required.
Replace check valve.
Relocate unit to warmer environment. Install crankcase
heater kit. Convert to synthetic lubricant.
Replace
Check line voltage and upgrade lines as required. Contact
electrician.
Install properly sized wire or service box. Contact electrician.
Ensure good contact on motor terminals or starter
connections.
Install proper starter overload heaters. Contact electrician.
Replace
Drain existing lubricant and refill with proper lubricant.
Drain existing lubricant and refill with proper lubricant.
Install ring kit.
Adjust piston rings.
Repair or replace as required.
Deglaze cylinder with 180 grit flex-hone.
Drain receiver tank with manual drain valve.
Replace seal or crankshaft assembly.
Inspect valves. Clean or replace as required. Install valve kit.
Replace
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