Common Troubleshooting Solutions - Dexter Laundry T300 Parts & Service Manual

Common Troubleshooting Solutions

Symptom Probable Cause Suggested Remedy
Machine Power Supply Check these areas: Circuit breakers, Voltage, Power leads,
does not Power connections. Is front display LED showing a dollar
start amount.
Door Switch Check for continuity through door switch when door is
closed. If no continuity, adjust or replace door switch.
Control Breaker or Check 1.5 amp (T-950 and T-1200 use 2.5amp) breaker or
Fuse fuse for continuity. If no continuity, replace breaker or fuse.
Control Trans- Check voltage output from control transformer for 120VAC.
former If voltage is incorrect, replace transformer.
Coin Acceptor Check coin acceptor to make surethere is no blockage or
damage. clean or replace acceptor.
Check PCB board Check all wire connections for sure contacts.
Check wiring be- Check data cable. This is the cable with the phone type
tween PCB connectors on the main PCB control and the VFD. With the
power removed unplug and check for damage, replug and
retry washer.
Check Relay PCB Check all wire connections for sure contact.
Check Door Motor Check that 120 v power is at Motor after start button is
pushed.
Machine will Coin Acceptor Check coin acceptor switch for any type of blockage or dam-
not accept age. Clean, adjust or replace the acceptor.
and count
Power Supply Check these areas: Circuit breakers, Voltage,Power leads,
coins
Power connection.
Door Closed Safety Check door closed switch at door hinge for proper operation.
Switch
Door Handle Check single door closed switch at left side of door handle
Closed Switch to close when handle is vertical.
Control Breaker or Check breaker or fuse for continuity. If no continuity, re-
fuse place breaker or fuse. The T-300 through T-950 use the 1.5
amp fuse. The T-1200 and t-1450 uses A 2.5 amp fuse.
Main PCB Replace
Door does Check display for Does Door Lock Error show on the front of display. If yes fol-
not lock fault code low tests described in fault code section.
Door locking Motor Check to insure that Motor is receiving 120VAC from main
relay PCB. If it is, replace solenoid.
Door Switch Check for continuity through door latch switch when door
closed. If no continuity, adjust or replace door switch.
Door will Thermoactuator Check to see if thermoactuator(s) and/or its mechanism is
not open stuck or binding and not allowing the door lock solenoid to
open. Check to be sure that the locking thermoactuator is
not receiving 120VAC during the last 1 1/2 minutes of the
cycle. Also check to see that the unlocking thermoactuator
is receiving 120VAC during the last minute of the cycle. If
the thermoactuators do
times, change the timer. If the timing and voltage are cor-
rect, replace the thermoactuator.
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not receive voltage at the correct
Common Troubleshooting Solutions
Symptom Probable Cause Suggested Remedy
Door will Door Rod Check to see that door rod from solenoid to lock ass'y is
not open long enough to allow lock ass'y to disengage. If not, adjust
rod.
Gear Motor Check the door lock motor. Make sure the motor is not stuck
or in a bind. If motor does not move freely, replace locking
motor.
No hot Water Valve Coil Check coil continuity at terminals and replace if no continu-
water in ity. 120 V power only on for 20 second in wash bath.
detergent
Water Inlet Check water inlet screens for blockage and clean screens if
dispenser
necessary.
Water Check to insure that water is turned on and operating.
P-20 Wire Harness Check black & white harness.
Hot water Water Valve Coil Check coil continuity at terminals and replace if no continu-
does not ity. Check for 120 V power from main relay PCB
enter tub in
Water Inlet Check water inlet screens for blockage and clean if neces-
wash
sary screens
Water Check to insure that water is turned on and operating.
Blk or Wht wire at Check black or white wires at Molex plug on PCB at main
main controller controller and at relay PCB.
Pressure Switch Check pressure switch continuity between terminals . If no
continuity, check pressure switch hose for obstruction. If
hose okay, change pressure switch.
No cold Water Valve Coil Check coil continuity at terminals and replace if no continu-
water to tub ity.
in wash
Water Inlet Check water inlet screens for blockage and clean if neces-
Screens sary.
Water Check to insure that water is turned on and operating.
Blk or whit wire Check black or white wires at Molex plug on PCB at main
at controller and controller and at relay PCB.
main relay PCB
Pressure Switch Check pressure switch continuity between terminal contacts.
If no continuity, check pressure switch hose for obstruction.
If hose okay, change pressure switch.
Water Drain Valve (open) Check these areas • Drain valve blockage • Drain valve mo-
comes in tor and gear train. If power but drain valve does not close,
but level replace valve. • Power to the drain valve. If no power to
does not drain valve, check (brn/yel) circuit for power.
rise
Blk or whit wire at Check black and white wires at molex plug on main PCB
controller controller and at main relay PCB
Water does Water Valve Coil Check coil continuity at terminals and replace if no continu-
not flush ity.
softener
Water Inlet Check water inlet screens for blockage and clean if neces-
compart-
Screens sary.
ment.
Water Check to insure that water is turned on and operating.
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