Filter
Top Products
Pressure Control Repair
26 309674M
Pressure Control Repair
Motor Control Board
Ultra, Nova, and ST Max 395/495/595 Models
Refer to wiring diagram for your sprayer shown on
pages 22, and 23.
Removal
1. Relieve pressure, page 7, and unplug sprayer.
2. Remove screws (12) and cover (50).
3. Disconnect all leads to motor control board (49).
4. Remove screws (6) and circuit board (49).
Installation
1. Remove old thermal paste from control box. Remove
cover from thermal pad on new motor control board.
2. Install motor control board (49) with screws (6).
3. Connect all leads to motor control board (49). See wir-
ing diagram for your sprayer on pages 22, 23, and 24.
4. Bundle and tie all loose wires so none touch induc-
tor coil (does not apply to 120V model sprayers).
5. Install cover (50) with screws (12).
Motor Control Board Kit
UltraMax II, Ultimate MX II, ST Max II 490/495/595
Models.
Refer to your sprayer wiring diagram, pages 24 and 25.
Removal
1. Relieve pressure, page 7.
2. Do steps 2- 9 of ON/OFF Switch/Power Cord Board
Kit removal instructions, page 24.
3. Remove screw (127) from bottom of control box and
screws (6) holding motor control board (49) to back
of control box (48).
4. Remove motor shroud (23) and screws (12).
5. Disconnect motor and thermistor connections (210, 211).
6. Disconnect pressure transducer lead (J11).
7. Disconnect potentiometer lead (J12) from board.
8. Remove grommet (5) from back of control box. Slide
motor leads through opening in back of control box (48).
9. 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. Do steps 1-8 of ON/OFF Switch/Power Cord Board
Kit installation instructions, page 24.
7. Replace shroud (23) with four screws (12).
WLD