Control Control Board Replacement - Graco Magnum ProX Instructions Manual

Control
Control
Control Board Replacement
Refer to your Owners/Operation manual for wiring dia-
grams.
Note color and location of all wires connected to the
control board before you start the control board replace-
ment.
Removal
1. Perform Pressure Relief Procedure, on page 1.
2. Unplug sprayer.
3. Remove Motor Shield page 3.
4. Disconnect pressure switch (10c) and motor con-
nector from control board (15).
5. Disconnect ON/OFF switch (17) leads and power
cord (3) from control board (15).
6. Remove screw (16) securing control board to drive
housing.
Installation
1. Carefully slide new control board (15) into place on
the side of the drive housing. Secure with screw
(16) and torque. See Drive Assembly Drawing
page 2 for torque.
3A3951A
2. Reconnect the power cord connector(s) to the cor-
rect leads on the control board (15).
3. Connect appropriate control board (15) lead(s) to
the ON/OFF switch (17).
4. Reattach pressure switch (10c) and motor connec-
tor to control board (15).
5. Install Motor Shield page 3.
Fuse Replacement
If fuse is blown, check for:
• Pinched or shorted wires
• A defective motor
• A locked or frozen pump
1. Perform Pressure Relief Procedure, on page 1.
2. Unplug sprayer.
3. Remove Motor Shield page 3.
4. Remove fuse (15a) from control board (15).
5. Install new fuse (15a) on control board (15).
6. Install Motor Shield page 3.
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