Troubleshooting

Sprayer Will Not Run

(See following page for steps)

Sprayer Will Not Run

(see following pages 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

Light on

Control board

Commanding motor

continuously

 

to run

 

See Code section for

See Step 1. Do you have over 100 VAC

(220 VAC for 230v units)?

YES

NO

See Step 2. Do you have over 100 VAC

(220 VAC for 230v units)?

Flashing

further troubleshooting

 

 

YES

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace

 

Repair or

the On/Off

 

replace

 

switch.

 

power cord.

See Step 3. Is there

Continuity through the thermal switch wires?

YES

See Step 4.

Does the motor run?

If motor is hot, let cool and retest. If Step 3 still NO shows no continuity, replace motor. The motor

has a defective thermal device.

 

 

 

Connect a test transducer to the board.

NO

 

 

 

 

 

Does the motor run?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

Replace the potentiometer.

YES

Replace

the transducer

NO

Replace

the control board

ti24726a

38

334530A

Page 38
Image 38
Graco 395/490/495/595 important safety instructions Sprayer Will Not Run