DeVilbiss Air Compressor General Manual page 18

TROUBLESHOOTING GUIDE (cont'd)
PROBLEM
Motor will not run.
Excessive belt wear.
Compressor is not supplying
enough air to operate accesso-
ries.
MG6-OLVERT-3B Rev. 0 12/30/99
CAUSE
Motor overload protection switch has
tripped.
Tank pressure exceeds pressure switch
"cut-in pressure".
Check valve stuck open.
Loose electrical connections.
Possible defective capacitor.
Paint spray on internal motor parts.
Possible defective motor.
Fuse blown, circuit breaker tripped
Pressure release valve on pressure
switch has not unloaded head pres-
sure.
Loose belt/tight belt.
Loose pulley.
Prolonged excessive use of air.
Compressor is not large enough for air
requirement.
Restricted air intake filter.
Loose belt.
Let motor cool off and reset switch by pressing the
red button located on the end of the motor. If the
overload still trips, check for defective capacitor or
wrong voltage.
Motor will start automatically when tank pressure
drops below "cut-in pressure" of pressure switch.
Remove and clean or replace. DO NOT OVER-
TIGHTEN.
Check wiring connection inside pressure switch
and motor terminal box area.
Contact Service Center for inspection or replace-
ment if necessary.
Have checked by a Service Center. Do not operate
the compressor in the spray area. See Flammable
Vapor Warning.
Have checked by a local Service Center.
1. Check fuse box for blown fuse and replace if
.
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; only dual element time
delay fuses are acceptable. Use a Fusetron
Type "T" time delay fuse.
3. Check for low voltage conditions and/or
proper extension cord.
4. Remove check valve and clean or replace if
it is stuck open or closed.
5. Disconnect the other electrical appliances
from circuit or operate the compressor on its
own branch circuit.
On an on/auto pressure switch equipped with a
pressure relief valve, bleed the line by pushing the
pressure switch to the OFF position. If valve does
not open, bend the lever until it does. If valve still
fails to bleed, replace the valve assembly.
Adjust belt tension. (See Belt Replacement.)
Check for worn keyway or pulley bore. Also check
for bent motor shaft. Replace parts if necessary.
(Refer to the Outfit Parts Manual.)
Decrease amount of air usage.
Check the accessory air requirement. If it is higher
than the CFM or pressure supplied by your air
compressor, you need a larger compressor.
Clean or replace air intake filter. Do not operate the
compressor in the paint spray area.
Adjust belt tension.
18
CORRECTION