DISPLAY FAULT/ERROR CODES
(cont.)
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.
“Ld” flashes if it takes longer than 5 minutes to pump out
water to a point where the operating pressure switch resets.
■
Press STOP/CANCEL to clear the display.
If a status signal comes back from the motor controller that a
current limit has been breached, the unit will return to
standby mode and display either “CA” for average current
limit trip, or “CI” for instantaneous current limit trip.
Average current trip occurs
if there is a 2-second average
of current draw greater than 5.55 Amps at the motor
windings.
Instantaneous current trip occurs
if there is a spike of 26
Amps instantly at the motor windings.
➔
This may signify problems with the drive motor,
thermal protector, or motor controller.
➔
Overloading the unit may cause this problem.
■
Press STOP/CANCEL to clear the display.
If the motor controller detects an unrecoverable off-balance
condition, the machine controller will shut down and display
an “ob” for off balance.
The lid switch
must be opened
at least once before
restarting the cycle if this condition occurs. Opening the lid
will allow the customer to view and redistribute the load.
■
Press STOP/CANCEL to clear the display.
“Sr” signifies a failure of the relay in the closed position.
With this failure, power to the motor controller cannot be
turned off by the machine controller. The machine control
board may have a bad relay and may need to be replaced.
➔
Check pins 1 & 5 of P16 of the machine controller
and pins 1 & 2 of P1 of the motor controller. This
should have AC line voltage when the motor
controller is powered.
■
Press STOP/CANCEL to clear the display.
The control should flash this error code if the following
conditions occur:
➔
The control cannot detect the lid switch opening and
closing properly.
➔
There is a disagreement between the motor and
machine controllers on the state of the lid switch (the
control should not allow the unit to run in this
condition).
➔
The user presses the START key while the lid is open.
➔
The user presses the START key without opening the
lid between cycles.
■
Open the lid or press STOP/CANCEL to clear the
display.
If lid opens while the unit is in running mode, time remaining
will be flashed on the display.
■
Close the lid and press START to continue the cycle.
The motor controller senses a suds lock condition by
analyzing the current draw on the drive motor. If a potential
suds lock is detected, the control tries up to 3 times to clean
out the unit with a mini-cycle. See Use & Care Guide for
more information.
“SL” is displayed if suds are detected but the unit is unable to
clean out suds. This may signify:
➔
a bad pump
➔
an extra heavy load
➔
excessive detergent
➔
excessive suds.
■
Press STOP/CANCEL to clear the display.
PAGE 2
TECH SHEET - DO NOT DISCARD
PART NO. 3954702 REV. A
FOR SERVICE TECHNICIAN'S USE ONLY
(CA) AVERAGE CURRENT LIMIT or
(CI) INSTANTANEOUS CURRENT
LIMIT
DISPLAY
EXPLANATION AND RECOMMENDED PROCEDURE
(ob) OFF BALANCE
(LS) or (L5) LID SWITCH ERROR
(Sr) or (5r) STUCK RELAY
(Ld) LONG DRAIN
(CE) COMMUNICATIONS ERROR
OPEN LID
(SL) or (5L) SUDS LOCK
