21
E N G L I S H •
User’s manual
COMPRESSOR DOES NOT COME UP TO
SPEED
Loose belt wheel or motor pulley, excessive
end play in motor shaft or loose drive belts.
Check belt wheel, motor pulley, crankshaft,
drive belt tension and alignment. Repair or re-
place as required.
Lubricant viscosity too high. Drain existing lu-
bricant and refill with proper lubricant.
Compressor valves leaky, broken, carbonized
or loose. Inspect valves. Clean or replace as re-
quired. Install Valve/Gasket Step. Saver Kit.
Defective ball bearings on crankshaft or motor
shaft. Inspect bearings and replace if required.
Install Bearing/Connecting Rod. Step Saver Kit.
COMPRESSOR IS SLOW TO COME UP TO
SPEED
Leaking or maladjusted centrifugal pilot valve.
Replace pilot valve O-ring. Adjust pilot valve.
Leaking check valve or check valve seat blown
out. Replace check valve.
Ambient temperature too low. Install crank-
case heater kit. Relocate compressor to warmer
environment.
COMPRESSOR RUNS EXCESSIVELY HOT
Inadequate ventilation around belt wheel. Re-
locate compressor for better air flow.
Drive belts too tight or misaligned. Adjust
belts to proper tension and alignment.
Compressor valves leaky, broken, carbonized
or loose. Inspect valves. Clean or replace as re-
quired. Install Valve/Gasket Step. Saver Kit.
Wrong belt wheel direction of rotation. Check
motor wiring for proper connections. Reverse
two leads on three-phase motors.
COMPRESSOR WILL NOT UNLOAD CYCLE
Leaking, broken or worn inlet unloader parts.
Inspect parts and replace as required.
Auxiliary valve dirty or seats worn. Inspect
parts. Clean, adjust or replace as required.
Leaking or maladjusted centrifugal pilot valve.
Replace pilot valve o-ring. Adjust pilot valve.
COMPRESSOR WILL NOT UNLOAD WHEN
STOPPED
Leaking or maladjusted centrifugal pilot valve.
Replace pilot valve o-ring. Adjust pilot valve.
Pressure switch unloader leaks or does not
work. Realign stem or replace.
EXCESSIVE NOISE DURING OPERATION
Loose belt wheel or motor pulley, excessive
end play in motor shaft or loose drive belts.
Check belt wheel, motor pulley, crankshaft,
drive belt tension and alignment. Repair or re-
place as required.
Lubricant viscosity too high. Drain existing lu-
bricant and refill with proper lubricant.
Compressor valves leaky, broken, carbonized
or loose. Inspect valves. Clean or replace as re-
quired. Install Valve/Gasket Step. Saver Kit.
Automatic drain valve clogged, leaking or de-
fective. Inspect valve and clean, repair or re-
place as required.
Defective ball bearings on crankshaft or motor
shaft. Inspect bearings and replace if required.
Install Bearing/Connecting Rod. Step Saver Kit.
Leaking check valve or check valve seat blown
out. Replace check valve.
Automatic start and stop mode is not suitable
for air demand. Adjust auxiliary valve for con-
stant speed operation
EXCESSIVE STARTING AND STOPPING
Air leaks in air discharge piping. Check tubing
and connections. Tighten joints or replace as
required.
Pressure switch differential too narrow. Adjust
pressure switch to increase differential, if dif-
ferential adjustment provided. Install pressure
switch with differential adjustment feature if
differential adjustment is desired.
Automatic drain valve clogged, leaking or de-
fective. Inspect valve and clean, repair or re-
place as required.
Automatic start and stop mode is not suitable
for air demand. Adjust auxiliary valve for con-
stant speed operation
Maladjusted or defective hydraulic unloader
valve Replace hydraulic unloader valve assem-
bly.
KNOCKS OR RATTLES
Loose belt wheel or motor pulley, excessive
end play in motor shaft or loose drive belts.
Check belt wheel, motor pulley, crankshaft,
drive belt tension and alignment. Repair or re-
place as required.
