TROUBLESHOOTING

Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you may be exposed to

voltage sources, compressed air, or moving parts. Before servicing unit unplug or disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air compressor to cool.

PROBLEM

CAUSE

 

CORRECTION

 

 

 

 

 

 

 

Excessive

Pressure switch does not

 

Move Auto/Off lever to the

tank pressure

shut off motor when

 

"Off" position, if the outfit

- safety valve

compressor reaches

 

does not shut off contact a

pops off.

"cut-out" pressure.

 

Trained Service Technician.

 

Pressure switch "cut-out"

 

Contact a Trained Service

 

too high.

 

Technician.

Air leaks at fit-

Tube fittings are not tight

 

Tighten fittings where air can

tings.

enough.

 

be heard escaping. Check

 

 

 

fittings with soapy water solu-

 

 

 

tion. Do Not Overtighten.

Air leaks at or

Check valve seat damaged.

 

Replace check valve. Refer to

inside check

 

 

the To Replace Check Valve

valve.

 

 

in the Service and Adjustment

 

 

 

section.

Air leaks in air

Defective air tank.

 

Air tank must be replaced. Do

tank or at air

 

 

not repair the leak.

tank welds.

 

 

 

 

 

Risk of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bursting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Do not drill into, weld or

 

 

 

otherwise modify air tank or

 

 

 

it will weaken. The tank can

 

 

 

rupture or explode.

Air leaks

Leaking seal.

 

Contact a Trained Service

between head

 

 

Technician.

and valve plate.

 

 

 

 

 

 

18- ENG­

Page 18
Image 18
Craftsman 919.167551 owner manual Troubleshooting, Problem Cause Correction