W 3 1 S E R I E S
H I G H P R E S S U R E B R E A T H I N G A I R C O M P R E S S O R
©ALKIN Kompresör Sanayi ve Ticaret Limited Şirketi
45
3.0 Troubleshooting
3.1 COMPRESSOR WILL NOT OPERATE
No power
Turn power key ON.
Motor starter overload tripped
Start and check if trips again. If it does, check if
compressor in not staying under load.
Pressure switch not making contact
Check all the terminals and wires. If pressure switch is
defective, replace it.
3.2 EXCESSIVE NOISE DURING OPERATION
Loose sheave, flywheel, belt, belt-guard,
intercooler, bolts or accessories
Detect and tighten.
Faulty vibration mounts
Check if the mounts are in good condition; if damaged,
replace.
Lack of oil in the crankcase
a. Check for possible damage to bearings.
b. Refill oil and check if the noise persists
Piston hitting the valve plate
Remove the compressor cylinder head; replace the gasket
with the brand new gasket and reassemble.
Deflected crankshaft or crankshaft bearing
failure
Replace the crankshaft.
Excessive dirt or carbon on piston(s)
Remove the compressor air heads; clean pistons and
valve(s), or replace if worn; reassemble.
3.3 COMPRESSOR KNOCKS
Crankshaft bearing failure
Replace bearings or crankshaft assembly.
Connecting rod journal bearings worn
Replace the connecting rods; if worn, replace the
crankshaft bushing center as well.
Wrist pins and journals are worn
Replace complete pin and rod assembly.
3.4 MILKY OIL IN THE CRANKCASE
High moisture and dirt content in the
ambient air
a. Pipe air intake from less humid source.
b. Change oil more frequently.
3.5 EXCESSIVE OIL CONSUMPTION
Restricted air intake
Replace intake filter element.
Oil leaks.
Tighten bolts and fittings; replace gaskets
Worn piston rings
Replace piston rings.
Low oil viscosity
Drain oil; refill with oil of proper viscosity
Piston rings misassembled
If piston rings are upside down, install in proper position.
Compressor tilted too much
Level compressor.
Scored or worn cylinder(s).
Replace cylinders.
Section
3
