Troubleshooting

Sprayer Will Not Shut Off

1.Perform Pressure Relief Procedure, page 13. Leave prime valve open (down) and turn ON/OFF switch OFF.

2.Remove control box cover so the control board status light can be viewed if available.

Troubleshooting Procedure

Plumb pressure gauge into paint hose, plug sprayer in, and turn power switch ON. Does sprayer reach or exceed

its maximum pressure?

YES

Is the control board status light on?

YES

 

 

 

Mechanical problem:

 

 

 

See the proper fluid pump

NO

 

 

 

 

manual for the sprayer for

 

 

 

further troubleshooting procedures.

 

 

 

 

 

 

 

Replace the control board.

NO

 

 

 

 

 

 

 

Unplug the transducer from control board.

Does motor stop running?

YES

Bad transducer.

Replace and test with a new one.

 

 

 

Replace the control board.

NO

 

 

 

 

 

 

 

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Graco 334466A important safety instructions Sprayer Will Not Shut Off, Troubleshooting Procedure