Use and Care Manual

Models CE7002, CE7003, CE7004
www.CH-Commercial.com
Troubleshooting Guide
SYMPTOM CAUSE SOLUTION
Excessivenoisein
operation
1� Loose pulley, flywheel,
belt, belt guard, cooler,
clamps or accessories
2� Lack of oil in crankcase
3.Pistonhittingthevalve
plate
4� Compressor floor
mounting loose
5� Defective crankcase
6.Excessivecrankcaseend
play
1� Tighten�
2� Check for possible damage to bearings, replenish oil�
3.Removethecompressorcylinderheadandinspectforforeignmatter
ontopofthepiston.Replacewithanewgasketandreassemblethe
head�
4� Tighten�
5.Repairorreplace.
6.Adjustandshimproperly.
Knock – same cycle as
RPMofpump
1� Main bearings
2� Connecting rod bearings
3� Loose flywheel
1.Replacebearings.
2.Replacerod.
3� Tighten�
Knock occurs while
compressor is loading
1� Connecting rod bearings
2� Wrist pins, wrist pin
bearings
3� Loose connecting rod nut
1.Replacerod.
2.Replacecompletepistonassembly.
3� Tighten�
Milky oil in oil reservoir Water entering oil reservoir
due to compressor
operating in high humidity
environment
a.Pipeairintaketolesshumidairsource.
b� Service unit (change oil, clean or replac�e air cleaner element, drain
tank) more often�
Excessiveoil
consumption
1.Restrictedairintake
2� Oil leaks
3� Worn piston rings
4� Wrong oil viscosity
5� Compressor tilted too
much
6� Scored cylinder
1� Clean or replace air filter�
2� Tighten bolts or replace gasket�
3.Replacerings.
4� Drain oil, refill with oil of proper viscosity� See “Lubrication” section�
5� Level compressor�
6.Replacecylinderandrings.
Oil in discharge air 1� Compressor air intake
restricted
2� Worn piston rings
3.Excessiveoilin
compressor
4� Wrong oil viscosity
1� Clean air filter element and check for other restrictions in the intake
system�
2.Replacerings.
3� Drain down to proper level�
4� Check viscosity� See “Lubrication” section�
Compressor vibrates 1� Mounting bolts loose
2� Compressor not properly
mounted
3.Pulleyandflywheelmis-
aligned
4.Beltslooseormismatched
5.Bentcrankshaft
1� Tighten�
2� Level compressor so that all feet touch the floor before tightening
down� Use shims if necessary�
3.Realign.
4� Tighten belts� See “Maintenance” section�
5.Replacecrankshaft.
Airblowingoutofinlet Brokeninletvalve Replacevalveplateassembly.
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