Graco Mark VII Max Repair Manual page 20

Troubleshooting
Sprayer Will Not Shut Off
1. Perform Pressure Relief Procedure; page 9. Leave 2. Remove control box cover so the control board
prime valve open and power switch OFF. status light can be viewed if available.
Troubleshooting Procedure
Plumb pressure gauge into paint
Mechanical problem: See the proper
hose, plug sprayer in, and turn power
NO
fluid pump manual for the sprayer for
switch ON. Does sprayer reach or
further trouble shooting procedures.
exceed its maximum pressure?
YES
Unplug the transducer from control
Replace the control board.
NO
board. Does motor stop running?
YES
Bad transducer. Replace and test
with a new one.
20 3A2244A