General Problem: Erratic Motor Operation - Graco MAGNUM 232738 Repair Manual

Specific Problem
Building circuit breaker opens
as soon as sprayer is plugged
into outlet and sprayer is NOT
turned on.
NOTE: Remove enclosure
mounting screws and pull
enclosure away from drive
housing. Take care not to pull
on leads from electrical cord
and power switch.
Specific Problem
Sprayer quits after running for
5 to 10 minutes
14
Cause
Sprayer electrical cord is
damaged
Sprayer power switch damaged
Also "Basic Electrical Problems" and "Sprayer Wiring Problems", page 12.

General Problem: Erratic Motor Operation

Cause
Electrical outlet is damaged
Electrical outlet supplying
wrong voltage
Also "Basic Electrical Problems" and "Sprayer Wiring Problems", page 12.
Motor is overheating
Solution
1. Unplug sprayer electrical cord.
2. Disconnect black electrical cord wire at
power switch
3. Unplug in-line connection white cord wire.
4. Plug in electrical cord
5. Test voltage between black and white
wires. Meter must read 200-260 V AC.
6. Replace electrical cord if no voltage.
1. Unplug sprayer electrical cord.
2. Disconnect black control board wire at
power switch.
3. Check resistance of switch with ohmmeter.
4. Reading must be infinity with power switch
OFF.
5. Reading must be zero with power switch
ON.
6. Replace power switch if damaged.
Solution
Reset building circuit breaker or replace building
fuse.
Try another outlet. Check electric supply with volt
meter. Meter must read 200-260 V AC. If voltage
is too high, do not use outlet until corrected.
"Motor is Hot", page 10.
Advanced Troubleshooting
309477F