Troubleshooting - Dexter Laundry T-900 Operator's Manual

4

TROUBLESHOOTING

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper operation after servicing.
ATTENTION: Lors des opérations d'entretien des commandes, étiqueter tous les fils avant de les déconnecter.
Toute erreur de câblage peut être une source de danger et de panne.
If any of the following symptoms occur on this washer, check the suggested remedies listed below. If all
probable causes have been eliminated and the symptom still exists, contact your local Dexter agent for
further troubleshooting assistance. See contact information at the end of this manual. Parts & Service
Manuals from Dexter are also available for further troubleshooting assistance.
Probable
Symptom
Cause
Machine does Power Supply
not start
"START" button
Door Switch
Control Breaker
or Fuse
Control
Transformer
Check PCB board
CPU board
Check Relay PCB
Check Door Lock
Mechanism
Machine Door switch
starts then assembly
stops
Door locking
mechanism
Door does not CPU Board,
lock Ribbon Cable or
Input/Output
Board
Door lock motor
Door Switch
8514-244-001 REV PR page 34
Suggested Remedy
Check these areas: Circuit breakers, Voltage, Power leads, Power
connections. Is front display LED lit?
Check for green start button light on Input/Output PCB #6 when button is
pressed. If no light, check membrane switch assembly and ribbon cable.
Check for continuity through door switches when door is closed and
locked. Check Input/Output PCB for green door closed light #4 and green
door locked light #3 showing that door switches are functioning correctly.
If no continuity or green light on when door closed and start button
pressed, check door switch and wiring assembly.
Check 1.5 amp (T-950, T-1200, T-1450 use 2.5amp) breaker or fuse for
continuity. If no continuity, replace breaker or fuse.
Check voltage output from control transformer for 120VAC. If voltage is
incorrect, replace transformer.
Check all wire connections for sure contacts.
Single red light should be illuminated. If light is flashing or not on, remove
power from washer for 2 minutes to reset board. Reapply power to
washer and check red light. If on solid, all okay. If still flashing or not on,
replace CPU board.
Check all wire connections for sure contact.
Check that 120VAC power is at mechanism after start button is pressed.
I/O PCB must have green input lights: DOOR LOCK #3, DOOR CLOSED
#4, TUB EMPTY #14, RUN KEY #1. START #1 will be on when pressed. If
these are not on, check door switches and wiring to/from control panel.
Check if I/O PCB red output light DOOR SOL. #3 is on. Check that 120VAC
power is at mechanism. Is the linkage rod adjusted properly?
Check Input/Output PCB for green input door closed light #4 and green
input door locked light. DOOR SOL. #3 light should be illuminated. If light
is flashing or not on, remove power from washer for 2 minutes to reset
CPU. Reapply power to washer and check red CPU light. If on solid, CPU is
okay. If still flashing or not on, replace CPU board. If CPU tests okay,
change Ribbon Cables between CPU and Input/Output PCB. (Check with
Dexter Support for latest testing procedures for I/O PCB.) If no voltage,
replace I/O PCB.
Check to ensure that door lock motor is receiving 120VAC from
Input/Output PCB. Is I/O PCB red output light #3 on? If 120VAC and
output light is lit, replace door lock motor.
Check for continuity through door latch switch when door closed. If no
continuity, adjust or replace door switch.