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Operating Instructions
Vertical
Models
Troubleshootlng
Chart (Contlnued)
Excessive noise
6, Noisy check valve in
6. Replace.
(knocking)
compressor system
Do not disassemble check val_
with
Continued
atr pressure In tank
Large quanity of oit in the
1. Worn piston rings
1. Replace with new rings. Maintain
oil level and change oil
dischargoe air
more frequently.
NOTE: In an oil
2. Comprressor air intake
2. Clean filter. Check for other restrictions in the intake system.
lubdcated
compressor there
restricted
wifl always be a small
3. Excessive oil in
3. Drain down to full level,
amount
of oil in the air
compre_or
stream,
4. Wrong oil viscosity
4. Use Mobil
1° 1OW-3O
Water
in discharge
airttank
1. Normal operation.
The
1. Drain tank more often. At least daily,
amount
of water
increases with humid
2. Add a filter to reduce the amount
of water
in the air line.
weather
Motor
hums and runs slowly
1. Use of extension
cord
1. Do not use an extension cord, Use longer air hose with
or not at all
larger diameter.
2. Replace check valve, unloader
valve or pressure _Nltch,
3. Check with voltmeter,
check reset switch on motor,
ff reset
switch trips repeatedly,
find and correct
the cause. See next
item,
4,
Repair or replace pressu re switch.
2. Maifunctionina
check
valve or unloader
valve
3. Low voltage
4. Malfunctioning
pressure
switch - contacts will not
close
Resetmechanismcutsout
repeatedly or fusesblow
repeatedly
1. Too many devices on
same circuit
2. Incorrect fuse size or
circuit breaker
3. Malfunctioning
check
valve
1. Limit the circuit to the use of only the air compressor.
2, Be sure that fuses or circuit breakers are rated properly.
3. Replace check valve.
Do not disassemble check valve with
alr pressum In tank
4. Pressure switch set too
4. Adjust or replace,
high
5. Loose wiring
5. Check atl electrical connections.
6. Malfunctioning
motor
6. Replace motor,
Tank does not hold pressure
1. Worn check valve
1. Replace check valve.
when compressors off and
the shut off valve is closed
_
Do not dissemble
check valve with
a/r Fwessure/n tank
2. Check all connections
and
2. Tighten.
fittings for leaks
3. Checl_ tank
for cracks or
3. Replace tank, Never repair a damaged
tank.
pin holes
Pressure switch
1. Malfunctioning
check
1. Replace the check valve if the unloader
valve bleeds off
continuously
blows air out
valve
constantly.
the unloader
valve
Do not d/sa._emble
o'_.,ck va/ve w//h
a/r pressure In tank
Pressure switch does not
1. Malfunctioning
unloader
1. Replace the pressure switch if it does not release the
release air when the unit
valve on pressure switch
pressure for a short period
of time when the unit shuts off.
shuts off
_
Do not di_r_r_ble
_s_Jre
Jw/_
m'lh
alr pres_ure In tank
Excessi_ vibration
1. Loose fasteners
1. Tighten.
2. Belt needs replaced
2, Replace with correct size.
3. Belt alignment
3. Align flywhell and pulley.
7
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