Dexter Laundry T-750 C4 Installation And Parts & Service Manual page 141

Common Washer Troubleshooting Solutions
Symptom Probable Cause
Machine Power Supply
does not
start
Door Switch
Control Breaker or
Fuse
Control Trans-
former
Coin Acceptor
Check PCB board
Check Wiring Be-
tween PCB
Check Relay PCB
Check Door Sole-
noid
Machine will Coin Acceptor
not accept
and count
Power Supply
coins
Door Closed Safety
Switch
Door Handle
Closed Switch
Control Breaker or
Fuse
Main PCB
Door does Check Display For
not lock Fault Code
Door Locking So-
lenoid
Door Switch
Door will Thermoactuator
not open
Suggested Remedy
Check these areas: Circuit breakers, Voltage, Power leads,
Power connections. Is front display LED showing a dollar
amount.
Check for continuity through door switch when door is
closed. If no continuity, adjust or replace door switch.
Check 1.5 amp breaker or fuse for continuity. If no continu-
ity, replace breaker or fuse.
Check voltage output from control transformer for 24VAC. If
voltage is incorrect, replace transformer.
Check coin switch to make sure coins trip switch and give
continuity across switch when closed. If no continuity, adjust
or replace switch.
Check all wire connections for sure contacts.
Check data cable phone type connectors unplug and VFD
and replug with power removed.
Check all wire connections for sure contact.
Check that 24vac power is at solenoid after start button is
pushed.
Check coin acceptor switch for any type of blockage or dam-
age. Clean, adjust, or replace the acceptor.
Check these areas: Circuit breakers, Voltage, Power leads,
Power connection
Check door closed switch at door hinge for proper operation.
Check single door closed switch at left side of door handle
to close when handle is vertical.
Check 1.5 amp breaker or fuse for continuity. If no continu-
ity, replace breaker.
Replace
Does "DOOR LOCK ERROR" show on the front of display. If
yes follow tests described in fault code section.
Check to insure that gear motor is receiving 24VAC from
main relay PCB. If it is, replace gear motor.
Check for continuity through door latch switch when door
closed. If no continuity, adjust or replace door switch.
Check to see if thermoactuator(s) and/or its mechanism is
stuck or binding and not allowing the door lock gear motor
to open. Check to be sure that the locking thermoactuator
is not receiving 24VAC during the last 1 1/2 minutes of the
cycle. Also check to see that the unlocking thermoactuator
is receiving 24VAC during the last minute of the cycle. If the
thermoactuators do not receive voltage at the correct times,
change the PCB. If the timing and voltage are correct, re-
place the thermoactuator.
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