Curtis CT Series, Instruction Manual

Page: 27 / 35

CT SERIES
CAP 410
PAGE 25
TROUBLESHOOTING
SYMPTOMS CAUSES REMEDIES
Flywheel rotation in wrong direction 1. Incorrect connection of motor
terminal. 1. Re-arrange terminal connection.
Overheating of bearings
1. Insufficient lubrication.
2. Bad lubrication system.
3. Crankshaft bearings to tight.
4. Belts too tight
1. Add lubrication oil.
2. Examine the system.
3. Readjust load on bearings.
4. Adjust belt tension
Flywheel rotation slows down 1. Heavy lubrication oil.
2. Drop in voltage.
3. Belts
slipping.
1. Refill with lighter lubrication oil.
2. Contact power company or install a
transformer.
3. Tighten belts
Severe vibration
1. Bent crankshaft
2. Loose belts
3. Unit is not level 1. Remove & Replace
2. Adjust belt tension
3. Level unit
Abnormal noise 1. Loose valve assembly.
2. Piston hits cylinder cover.
3. Worn connecting rod. 1. Tighten valve bolt and lock nut.
2. Check piston & rod assembly for
excessive wear.
Pressure cannot be built up or only up
to a certain extent 1. Worn valve plate.
2. Dirt on the valve plate.
3. Leaks from safety valve.
4. Leaks from bolt holes.
5. Uneven valve seat surface.
6. Excessive blow by on piston rings.
7. Bad packing (gasket too thick).
8. Excessive air leaks. 1. Repair or replace valve plate.
2. Remove and clean it.
3. Repair or replace safety valve.
4. Tighten the nuts even with packing.
5. Remove and lap the surface.
6. Replace with new ones
7. Replace packing (gasket).
8. Eliminate air leaks.
Inaccuracy of pressure gauge 1. Pressure gauge damaged. 1. Replace.
Excessive oil consumption
1. Worn piston ring
2. Worn
piston.
3. Worn cylinder
4. Wrong oil
5. Dirty filter
1. Replace.
2. Replace.
3. Replace.
4. Replace with correct oil.
5. Replace
Slipping of belts 1. Working pressure too high.
2. Improper belt tension.
3. Worn
belt.
1. Lower working pressure.
2. Adjust belt tension.
3. Replace with new ones.
WHEN COMPRESSOR CAN BE STARTED
Overheating of electric motors
1. Overloading of motor due to
excessive working pressure (higher
than stipulated pressure).
2. Burnt piston.
3. Burnt bearing metals.
4. Drop of voltage or low voltage
5. Loose
connections
1. Lower working pressure.
2. Rebuild
compressor.
3. Rebuild compressor.
4. Contact power company or install a
transformer
5. Inspect and tighten connections.
Unit will not start 1. Breakdown of electric current.
2. Line
failure.
3. Malfunction of motor
1. Contact power company.
2. Examine the line. Replace with new
wiring. (See page 24)
3. Contact motor manufacturer.
WHEN COMPRESSOR
CANNONT BE
STARTED
Fuse tends to blow 1. Incorrect size.
2. Wrong
connections
3. Overloading of motor.
4. Overloading of motor due to leaks of
check valve.
1. Replace with correct size.
2. Change
connections.
3. Eliminate the loading.
4. Remove and repair check valve.