42
E
nglish
TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
Excessive noise
1. Loose valve
2. Noisy only during start up
3. Piping loose
4. Unit not installed level
5. Improper grad of oil in crankcase
6. Carbon or foreign material on piston
7. Worn bearings
1. Inspect valve for damage and replace as required
2. Adjust for proper tension and check for loose belts
3. Tighten as required
4. Ensure that unit is mounted level
5. Replace oil with SAE 10W-30 non-detergent
compressor oil
6. Clean piston. Check cylinder walls or scoring
7. Replace main bearings
Compressor over
heating
1. Undersized unit for
air requirements
2. Compressor location
3. Air leaks in the system
4. Restricted air filter
5. Improper grade or level of oil
6. Worn, damage or carbon
build up on valve
7. Carbon build up at after-cooler tube
check valve
1. Contact the store where you purchased
the compressor
2. See installation section
3. Fix leaks
4. Clean or replace filter
5. Replace with SAE 10W-30 non-detergent
compressor oil
6. Clean, repair or replace valves
7. Clean or replace after-cooler tube check valve
Pressure switch
unloading does not
function or leak air
when unit is operating
or not operating
1. Pressure switch unloading
may be dirty or faulty
2. Check valve may be dirty or faulty
1. Clean, repair or replace pressure switch
2. Clean, repair or replace check valve
Oil leaks or appea-
rance of oil on the
compressor
1. Spillage of oil when filling
2. Overfilling the crankcase
3. Improper grade of oil
4. Leak at oil filler plug
5. Oil leak at gasket, cap screw, head,
cylinder or crankcase
6. Loose valve plugs
7. Loose side or end plate
8. Oil seal leak
9. Scratch or burn on the crankskaft
1. Wipe unit clean
2. Drain oil and fill to proper level
3. Replace with proper SAE 10W-30 non-detergent
compressor oil
4. Tighten or replace oil filler plug and/or „O“ ring
5. Replace gaskets as required. Use pipe dope or
gasket compound on all cap screw threads
6. Tighten valve plug
7. Tighten plates
8. Replace oil seal
9. File or sand with emery cloth
