PROBLEM

CAUSE

CORRECTION

Motor will not

Fuse blown, circuit

1. Check fuse box for blown fuse

run (continued)

breaker tripped.

and replace as necessary. Reset

 

 

circuit breaker. Do not use a fuse

 

 

or circuit breaker with higher

 

 

rating than that specified for

 

 

your particular branch circuit.

 

 

2. Check for proper fuse. You

 

 

should use a time delay fuse.

 

 

3. Check for low voltage conditions

 

 

and/or proper extension cord.

 

 

4. Disconnect the other electrical

 

 

appliances from circuit or

 

 

operate the compressor on

 

 

its own branch circuit.

Safety Valve

Pressure switch, check

Have checked by a Trained

on pump

valve, or pump could be

Service Technician.

"pops" out

in need of servicing.

 

Knocking Noise

Possible defect in

Operate safety valve manually

 

safety valve.

by pulling on ring. If valve still

 

 

leaks, it should be replaced.

 

Defective check valve.

Remove and clean, or replace.

 

Loose pulley.

Tighten pulley set screw.

 

Loose flywheel.

Tighten flywheel screw.

 

Compressor mounting

Tighten mounting screws.

 

screws loose.

 

 

Loose belt.

Loosen wingnut and then

 

 

tighten wingnut until it contacts

 

 

the washer, plus one turn.

 

Carbon build-up in pump.

Have checked by a Trained

 

 

Service Technician.

 

Belt too tight.

Loosen wingnut and then

 

 

tighten wingnut until it contacts

 

 

the washer, plus one turn.

Excessive

Loose belt.

Loosen wingnut and then

belt wear

 

tighten wingnut until it contacts

 

 

the washer, plus one turn.

 

Tight belt.

Loosen wingnut and then

 

 

tighten wingnut until it contacts

 

 

the washer, plus one turn.

 

Loose pulley.

Have checked by a Trained

 

 

Service Technician.

 

Pulley misalignment.

See Motor Pulley/Flywheel

 

 

Alignment paragraph in the

 

 

Maintenance section.

Squealing

Compressor pump

See Oil-Checkingparagraph

sound

has no oil.

in the Maintenance section.

 

Loose belt.

Loosen wingnut and then

 

 

tighten wingnut until it contacts

 

 

the washer, plus one turn.

N020206

22 - ENG

Page 22
Image 22
Porter-Cable N020206-NOV08-0, C7501M instruction manual See Motor Pulley/Flywheel