Pressure Control Repair - Graco Pro 230ES Repair And Parts Manual

Pressure Control Repair

Motor Control Board Pro 230ES
Refer to wiring diagram page 25.
Removal
1. Relieve pressure, page 9, and unplug sprayer.
2. Unplug sprayer powercord.
3. Remove screws (12) and cover (50).
4. Disconnect all leads to motor control board (49).
5. Remove screws (6) and circuit board (49).
Installation
1. Remove old thermal paste from control box.
Remove cover from thermal pad on new motor con-
trol board.
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2. Install motor control board (49) with screws (6).
3. Connect all leads to motor control board (49). See
wiring diagram, page 26.
4. Install cover (50) with screws (12).
3A2817A
Motor Control Board Kit Pro
270ES
Refer to wiring diagram page 28.
Removal
1. Relieve pressure, page 9.
2. Unplug sprayer powercord.
3. Perform steps 2-9 of ON/OFF Switch/Power Cord
Kit removal instructions, page 27.
4. Remove screw (127) from bottom of control box and
screws (6) holding motor control (49) to back of con-
trol box (48).
5. Remove motor shroud (23) and screws (12).
6. Disconnect motor and thermistor connections (210,
211).
7. Disconnect pressure transducer lead (J11).
8. Disconnect potentiometer lead (J12) from board.
9. Remove grommet (5) from back of control box. Slide
motor leads through opening in back of control box.
10. Remove motor control board (49) from control box
(48).
Installation
1. Feed motor leads through back of control box (48).
2. Replace grommet (5) in control box (48).
3. Position motor control board (49) in control box.
Secure control board with screws (6 and 127).
4. Connect potentiometer and transducer leads to con-
trol board.
5. Connect motor and thermistor leads (210, 211).
6. Perform steps 1-8 of ON/OFF Switch/Power Cord
Kit installation instructions, page 28.
7. Replace shroud (23) with four screws (12).
Pressure Control Repair
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