Dexter Laundry T-50X2 Guida per l'amministratore

8533-069-001

T50X2 OPL Stack Dryer

Troubleshooting, Fault Codes, And Schematics

Starting serial number 213228

Trouble Shooting

Electronic Control Diagnostic Lights

The electronic control has 6 diagnostic lights to aid in service of the dryer. Each pocket has indicator

lights for the motor circuit, door switch circuit, and the heat circuit. When the electronic control is carefully

unlocked and moved forward these lights are visible on the circuit board. They are each labeled as to

function indicated.

1. When either dryer door is closed, the appropriate door light on the computer should be illuminated

indicating that the door is closed.

2. When either dryer is running, the appropriate motor light on the computer should be illuminated

indicating that the computer is calling for the motor to operate.

3. When either dryer is calling for heat, the appropriate heat light on the computer should be

illuminated indicating that the computer is calling for heat.

An example of their function would be troubleshooting an upper dryer pocket that did not heat.

1. Start the machine and insure that it did not heat.

2. Check the upper heat light and see if it is lit.

3. If the heat light is on, this would indicate that the computer was calling for heat and that it was not

at fault. You would then go on to check the rest of the heat circuit.

Electronic Control Test Cycle

This test cycle allows the dryer to run for 5 minutes without the need for adding money while servicing. To

actuate this 5 minute test cycle leave the loading doors closed, unlock the computer and push the program

button on the right front corner of the computer as if you were putting it into the program mode. This will

give a 5 minute cycle on both tumblers for evaluating the machine.

2Part # 8533-066-001 2/10

Trouble Shooting Fault Codes

F1 Shorted thermostat sensor

F2 Open thermostat sensor

F3 EEPROM corrupted

F4 Gas valve on fault

F5 Temperature fault

TROUBLESHOOTING TIPS

Symptom Probable Cause Suggested Remedy

Tumbler does not turn Drive belts Check both drive belts.

Replace if failed.

Drive motor Check capacitor and motor.

Replace if failed

Door switch Check door switch contacts

and adjustment. Adjust or

replace door switch.

Electronic Control Is electronic control closing

motor relay to power drive

motor? Check for motor light

on electronic control. If no

light change control. If light is

on, check voltage and wiring

to motor.

Part # 8533-066-001 2/10

Symptom Probable Cause Suggested Remedy

Tumbler turns but

no spark at burner

Glass fuse Check small glass control fuse in back of dryer. Replace

if failed.

Temperature Sensor The temperature sensor should have between 30,000

ohms and 60,000 ohms resistance at room temperature if

okay. Replace if not in this range.

Ignition Check for 24VAC output from transformer.

Transformer Replace if have 120V between black & white and no 24V

between red and yellow.

Over temperature Check to see if manually resettable thermostat.

Thermostat is kicked out. Reset by pushing red reset

button.

Ignition control Check for 24VAC coming into the control on the at

burner red wire. If voltage, then check for 24VAC out on

the brown wire. Also check for spark at the ignitor. If no

24VAC output or no spark to the ignitor, replace ignition

control.

Air Flow Switch Check air ﬂow switch to be sure it closes when dryer is

running. If not, adjust or replace switch.

Hi-limit Check for continuity. Should be 0 ohms resistance when

cold. If not, replace thermostat.

Gas supply No gas can cause system lockout

Electronic Control Is electronic control closing gas relay to power Control

heat circuit? Check for gas light on electronic control. If

no light change control. If light is on, check voltage and

components in heat circuit at transformer at rear of unit.

4Part # 8533-066-001 2/10

Symptom Probable Cause Suggested Remedy

Tumbler turns,

ignition sparks, no

ﬂame

Gas supply Make sure gas supply is working.

Gas pressure Make manometer check of gas pressure. Adjust if

necessary.

Spark Electrode Sensor Check for damage to electrode or mounting.

Replace if necessary.

Gas valve Check coil continuity, replace valve if failed.

Ignition Control Check for 24VAC to gas valve coils. If no voltage

replace ignition control.

Burner Lights, but

goes on and off

Electrodes Check low voltage harness for possible wire break

or cuts to allow no signal back to ignition control

Slow drying Temperature Setting Check program for correct high temperature

setting. Adjust if necessary.

Air ﬂow restrictions necessary 1. Check lint screen and clean if necessary.

2. Check exhaust for correct length and clean if

necessary.

3. Check exhaust damper to insure that it opens

when dryer is running and closes when dryer is

not in use.

4. Check makeup air to insure that it is adequate.

Increase makeup air if necessary.

5. Check static Back pressure no more than .3

Temperature Sensor The temperature sensor should have between

30,000 ohms and 60,000 ohms resistance at room

temperature if okay. Replace if not in this range.

Part # 8533-066-001 2/10

Symptom Probable Cause Suggested Remedy

Erratic display Initial Start-up If erratic on initial start-up, leave power on for

approximately one hour and check machine

operation again.

Grounding Machine must be grounded by separate conductor

back to neutral bar in breaker box.

Program Check program and make corrections if

necessary.

Voltage spike Power down machine for 20 seconds and

repower. If no improvement, replace control.

Manual overtemp

Tripping Frequently

Recirculating

chamber Lint

Accumulation

Remove manual overtemp thermostat and inspect

in chamber for excessive lint build up. Access also

gained to this chamber by removing recirculation

duct mounted at bottom of chamber, or the panel

inside burner chamber between burners and rear

back panel

Exhaust ducting

Excessive lint buildup

Remove exhaust duct at rear of dryer and inspect

for excessive lint build up in complete duct from

dryer to where duct exits building.

Clean linto of of top

heat air chamber

above tumbler

Remove front panel completely. Be careful of any

wiring attached. Remove heated air chamber

cover and clean above tumbler back to burner

housing.

6Part # 8533-066-001 2/10

Part # 8533-066-001 2/10

8Part # 8533-066-001 2/10

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