Graco 25R757 Operation, Parts page 31

Electrical cont...
Sprayer Will Not Run
(See following page for steps)
Remove Control box cover.
Turn sprayer ON. Observe
control board status light on
control board (see page 27).
No Light
Once
Normal Operation
Control board
Light on
Commanding motor
continuously
to run
See Code section for
Flashing
further troubleshooting
See Step 3. Is there
Continuity through the
thermal switch wires?
YES
See Step 4.
Does the motor run?
YES
Replace the
potentiometer.
334641J
See Step 1. Do you
have over 100 VAC
(220 VAC for 230v units)?
YES
If motor is hot, let cool and retest. If Step 3 still
NO shows no continuity, replace motor. The motor
Connect a test transducer to the board.
NO
YES
Replace
the transducer
Troubleshooting
See Step 2. Do you
have over 100 VAC
(220 VAC for 230v units)?
YES
Replace
the On/Off
switch.
has a defective thermal device.
Does the motor run?
Replace
the control board
NO
NO
Repair or
replace
power cord.
NO
ti24726a
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