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Advanced Troubleshooting
309226M
17
Sprayer Wiring Problems
(cont.)
Motor thermal overload cutoff
switch damaged.
Startup Hazard After Thermal
Overload
, page 6.
1. Unplug sprayer electrical cord.
2. Remove motor harness from control card.
3. Check for continuity between yellow leads
or motor harness.
4. If thermal relief switch is open (no continu-
ity) allow motor to cool.
5. If switch remains open after motor cools,
replace motor using
Motor Kit
, page 22.
6. If thermal relief switch closes after motor
cools, find correct cause of overheating.
Terminals are damaged or
loose.
Replace any damaged terminals. Make sure all
terminal connections are tight.
Specific Problem
Cause
Solution
General Problem: Circuit Breaker is Tripping
Specific Problem
Cause
Solution
Building circuit breaker opens
as soon as sprayer is turned
on.
Sprayer electrical wiring is
pinched or insulation is
damaged.
Repair or replace any damaged wiring or
terminals. Securely reconnect wires.
Wires between pressure
control switch and control
board are pinched.
Motor armature is shorting.
Check for shorts using armature tester (growler)
or perform spin test,
Motor Diagnostics
, page
24. If shorts are evident, replace motor using
Motor Kit
, page 22.
Control board is damaged.
CAUTION:
Do not perform
control board diagnostics until
you have determined the
armature is good. A bad motor
armature can burn out a good
motor control board.
See
Control Board Diagnostics
, page 25.
Replace control board if damaged using
Control
Board Kit
, page 22.
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