Troubleshooting Chart - Speedaire 4UP73 Operating Instructions & Parts Manual

Speedaire Operating Instructions and Parts Manual
Speedaire Permanently Lubricated
Twin Cylinder Air Compressor

Troubleshooting Chart

Performing repairs may expose voltage sources, moving parts, or compressed air sources. Personal
injury may occur. Prior to attempting any repairs unplug the power cord and bleed off air pressure.
Symptom
E
N
Excessive tank pressure – safety valve
G
pops off
L
I
S
H
Air leaks at fittings
Air leaks at check valve
Air leaks at pressure switch release valve
Air leaks from air tank
Regulator knob – continuous air leak
Regulator will not shut-off air outlet
Pressure reading on the regulated
pressure gauge drops when an accessory
is used
®
Possible Causes
1. Pressure switch does not shut off
motor when compressor reaches
"cut-out" pressure
2. Pressure switch "cut-out" too high
Fittings are not tight enough
Defective or dirty check valve
1. Defective pressure switch valve
2. Defective check valve
Defective air tank
Dirty or damaged regulator internal parts
It is normal for "some" pressure drop to occur
Corrective Action
1. Move the pressure switch lever to the
OFF position. If the outfit doesn't
shut off, and the electrical contacts are
welded together, replace the pressure
switch
If the contacts are good, check to see
if the pin in the bottom of the pressure
release valve is stuck. If it does not
move freely, replace the valve
2. Return the outfit to a Service Center to
check and adjust, or replace switch
Tighten fittings where air can be heard
escaping. Check fittings with soapy
water solution. DO NOT OVER-TIGHTEN
Defective check valve results in a constant air
leak at the pressure release valve when there
is pressure in the tank and the compressor is
shut off. Remove and clean or replace check
valve. DO NOT OVER-TIGHTEN
1. Remove and replace the release valve
2. A defective check valve results in a
constant air leak at the pressure release
valve when there is pressure in the tank
and the compressor is shutoff. Remove
and clean or replace check valve. DO NOT
OVER-TIGHTEN
Air tank must be replaced. Do not repair the
leak
MODIFY AIR TANK OR IT WILL WEAKEN
Clean or replace regulator
If there is an excessive amount of pressure
drop when the accessory is used, adjust the
regulator
NOTE: Adjust the regulated pressure under
flow conditions (while accessory is being use)
8
4UP73
DO NOT DRILL INTO,
WELD, OR OTHERWISE