Motor Control Board Diagnostics
3A2817A
31
Pressure Control Transducer
Removal
1.
Relieve pressure
, page 9.
2.
Unplug sprayer powercord.
3.
Remove screws (12) and cover (50).
4.
Disconnect transducer lead from motor control
board (49).
5.
Slide transducer grommet (20) out of control box
(48).
6.
Remove pressure control transducer (38) and o-ring
(3) from filter housing.
Installation
1.
Install o-ring (3) and pressure transducer (38) in fil-
ter housing (15). Torque to 30-35 ft-lb.
2.
Thread transducer lead plastic connector through
transducer grommet (20) and slide grommet into
slot in control box housing (48).
3.
Connect transducer lead (J7 or J11) to motor control
board (49).
4.
Install cover (50) with screws (12).
Pressure Adjust Potentiometer
Removal
1.
Relieve pressure
, page 9.
2.
Unplug sprayer powercord.
3.
Remove screws (12) from cover (50).
4.
Disconnect potentiometer lead from motor control
board (49).
5.
Remove potentiometer knob (11), nut (37a) and
pressure adjust potentiometer (37).
Installation
1.
Install pressure adjust potentiometer (37) and nut
(37a).
a.
Turn potentiometer fully clockwise.
b.
Install knob (11) at full clockwise position.
2.
Connect potentiometer lead (J8 or J12) to motor
control board (49). See
wiring diagram
pages 26 or
28 for your sprayer model.
3.
Install cover (50) with screws (12).
