13
Code Possible Cause
Possible Solution
22
Tank air pressure exceeds pressure switch
Set pressure switch in the “Auto” position. The motor will
"cut-in” setting.
automatically start when air tank pressure drops below "cut-in”
pressure.
2 3
Pressure relief valve on pressure switch has
Drain tanks. If problem persists,
not unloaded pump head pressure.
contact D
E
WA LT customer service at 1-800-4-DEWA LT.
2 4
Defective motor, motor capacitor, or pressure switch.
Contact D
E
WA LT Customer Service at 1-800-4-DEWA LT.
2 5
Pressure switch does not shut off motor when
Move the pressure switch to the OFF position.
air compressor reaches "cut-out" pressure.
If the motor does not shut off, unplug the air compressor. If the
electrical contacts are welded together, replace the pressure
s w i t c h .
2 6
Air compressor is not large enough for air required.
Check accessory air requirement. If higher than the CFM or
pressure supply of the air compressor, then larger air compressor
is required.
2 7
Defective pressure switch.
Replace the pressure switch.
2 8
Defective safety relief valve.
Operate safety relief valve manually by pulling on test ring. If it
still leaks, replace the safety relief valve.
2 9
Excessive air tank pressure.
Defective pressure switch. Replace the pressure switch.
3 0
Defective gaskets.
Replace and torque head bolts to 6 to 7 ft lbs.
3 1
Fittings not tight enough.
Wa r n i n g: Drain air before tightening. Tighten fittings so air can
not be heard escaping. Check joint with soap solution. Do not
o v e r t i g h t e n
3 2
Defective or rusted air tank
Air tank must be replaced. Do not attempt to repair air tank.
3 3
Pressure regulator knob not turned to high enough
Adjust pressure regulator knob to proper setting or replace.
pressure or defective pressure regulator.
3 4
Hose or hose connections are too small or too long.
Replace with larger hose or connectors.
3 5
Possible defective reed valve.
Remove pump head and inspect valve plate and reed valve.
Clear or replace valves as required.
3 6
Air compressor on uneven surface.
Do not incline the air compressor more than 10˚ in any direction
while running.
3 7
Crankcase overfilled with oil.
Drain oil. Refill to proper level with D
E
WA LT synthetic oil.
3 8
Plugged oil dipstick vent.
Clean dipstick vent.
3 9
Water in oil due to condensation.
Drain oil. Refill to proper level with D
E
WA LT synthetic oil.
4 0
Condensation in air tank caused by high level of
Drain air tank after every use. Drain air tank more often in humid
atmospheric humidity.
weather and use an air line filter.
4 1
Compressor located in damp or humid location.
Relocate the compressor.
