If there is any breakdown in communication between the
machine controller and the motor controller, “CE” flashes
and the unit beeps once. Units with repeated CE errors may
be diagnosed as follows:
SERIAL COMMUNICATION CHECKS
1. Check for contamination on P4 of the machine controller
and P2 of the motor controller. If contaminants exist,
disconnect power to the unit and gently scrape any
contaminant off the pins.
2. Check the resistance values between the serial
communication pins with the connectors in place
(resistance reading should be less than 10 ohms). Make
sure the harness is connected properly.
3. After ensuring integrity of this connection, run the unit
again to see if problem still exists. If so, continue with
CONTROL CHECKS.
CONTROL CHECKS
1. Check motor winding resistance at P6 of the motor
controller (in the console). If an open circuit is found, this
is an indication of problems with connections to the drive
motor or the motor itself. See DRIVE MOTOR CHECKS.
2. If winding resistance is correct, check motor controller
fuse; if open, replace motor controller.
DRIVE MOTOR CHECKS
1. Check connection of the lower harness to the drive motor
and pump motor.
2. Check if the drive motor thermal protector has opened.
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