Symptoms:
•
Sprayer does not run at all
•
Digital Display shows dashes and Psi icon is not blinking
•
Control board status light blinks once when switch is turned on but then stays off.
What does this mean?
Power to board is ok but there is no RUN command to the motor. Either the potentiometer or control board is
likely the problem.
Troubleshooting Procedure:
Check potentiometer & connections
to control board. Set sprayer to OFF.
Disconnect potentiometer from control board socket. Check that potentiometer and control board contacts are
clean and secure.
Reconnect potentiometer to control board socket. Set sprayer ON
and control knob to ½ turn clockwise. If sprayer does not run, set
sprayer to OFF and go to next step.
Connect a known good potentiometer to control board socket and set sprayer ON and control knob to ½ turn
clockwise. If ok, replace pot. Replace control board if sprayer still does not run. But first, verify transducer
and connections are ok. See next page.
OR
Short center pin of socket to each outer pin. Install new potentiometer
if sprayer runs. Replace control board if sprayer does not run. But first,
verify transducer and connections are ok. See next page.
Check transducer & connections
to control board. Set sprayer to OFF and
disconnect power to sprayer
.
Disconnect transducer from control board socket. Check that transducer and control board contacts are
clean and secure.
Reconnect transducer to control board socket. Connect power, set sprayer ON and control knob to ½ turn
clockwise. If sprayer does not run, set sprayer to OFF and go to next step.
Connect a known good transducer to control board socket.
Set sprayer ON and control knob to ½ turn clockwise. Install new transducer if sprayer runs. Replace control
board if sprayer does not run.
_ _ _ _
28
