Instruction Manual
W32- Series Medium-Vertical Compressors
Page I - 27.
I – 15. TROUBLE SHOOTING
1. COMPRESSOR WILL NOT OPERATE
1. No electrical power
Switch the power on
2. Motor starter overload tripped
Re-start and check if trips again. If it does check if the centrifugal unloader
venting air at shutdown, resulting in staring under load.
3. Pressure switch not making
contact
Check all the terminals, and wires. If pressure switch defective replace it
4. Electric circuitry faulty
Before attempting to make any repairs, check all fuses , terminal
connections, wire leads, make sure that motor datacomplies with mains
supply.
2. EXCESSIVE NOISE DURING OPERATION
1. Loose sheave, flywheel, belt,
belt-guard, intercooler, bolts or
accessories
Detect and tighten.
2. Faulty vibration mounts
Check if the mounts in good condition; if damaged, replace.
(damaged vib.mounts can cause the baseplate to hit the base of canopy)
3. Loose motor fan
Tigten; if damaged, replace.
4. Lack of oil in the crankcase
a. Check for possible damage to bearings
b. Fill oil and check if the noise persists.
5. Piston hitting the valve plate
Remove the compressor cylinder head; add a new gasket and reassemble.
6. Compressor mounting loose
Tighten
7. Deflected crankshaft or
crankshaft bearing failure
Replace crankshaft
8. Excessive dirt or carbon on
piston (s)
Remove the compressor cylinder head; clean pistons and valve(s)
(Or replace if worn); reassemble.
3. COMPRESSOR KNOCKS
1. Crankshaft bearing failure
Replace bearings or crankshaft assembly
2. Connecting rod journal bearings
worn.
Replace the connecting rods; if worn,replace the crank pin bush as well
3. Wrist pins and journals are worn
Replace complete pin and rod assembly.
4. MILKY OIL IN RECERVOIR
1. High moisture content in the
ambient air
a. Pipe air intake from less humid source.
b. Change oil more frequently.
5. EXCESSIVE OIL CONSUMPTION
1. Restricted air intake
Replace air filter element
2. Oil leaks
Tighten bolts and fittings; replace gaskets.
3. Worn piston rings
Replace piston rings
4. Low oil viscosity
Drain oil; refill with oil of proper viscosity (see section 4.3.)
5. Piston rings misassembled
If piston rings are upside down, install in proper position.
6. Compressor tilted too much
Level compressor
7. Scored or worn cylinder(s)
Replace cylinders.
6. OIL IN DISCHARGE AIR
1. Restricted air intake
Replace air filter element; check for other restrictions at the inlet.
