T-80 OPL Dryer Troubleshooting, Fault Codes, Schematics

T-80 OPL Dryer Troubleshooting, Fault Codes, Schematics
Dexter Industrial On Premise Dryer
Troubleshooting, Fault Codes, And Schematics
Starting serial number
Part # 8533-077-001 11/13
Dryer Trouble Shooting
Symptom
Probable Cause
Tumbler does not turn
Tumbler turns but no spark at burner
2
Part # 8533-077-001 11/13
Suggested Remedy
Drive belts
Check both drive belts. Replace if failed.
Tumbler does not turn
Check capacitor and motor. Replace if failed
Door switch
Check door switch contacts and adjustment.
Adjust or replace door switch.
Timer Tumbler does not turn
Check to see if heat timer is turned on
Glass fuse
Check small glass control fuse in back of
dryer. Replace if failed.
Thermostat
Check if voltage is passing through the
two wires attached to the temoprature
thermostat
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
Dryer Trouble Shooting
Symptom
Tumbler turns, ignition
sparks, no flame
Probable Cause
Suggested Remedy
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 thermostat 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
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 lint from 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.
Manual overtemp
Tripping Frequently
Part # 8533-077-001 11/13
3
DRYER FAULT CODES
FAULT #
FAULT # FAULT
DESCRIPTION
Shorted thermostat sensor.
F1
4
ACTION
Dryer stops and “F1” flashes on the 4-digit display. When short
circuit on sensor input is removed, “LOAd” appears on the
4-digit display and the remaining dry time is reset.
F2
Open thermostat sensor.
Dryer stops and “F2” flashes on the 4-digit display. When a
good sensor is connected to sensor input, “LOAd” appears on
the 4-digit display and the remaining dry time is reset.
F3
EEPROM corrupted
Dryer will not start and “F3” appears on the 4-digit display. The
power to the dryer must be cycled to reset the controller. Fault
should only occur when starting a dry cycle.
F4
Gas valve on fault.
The drying temperature did not increase 1°F. in 5 minutes. “F4” will flash on the display and the dry cycle will finish
without calling for heat (energizing gas valve). Opening the
door or pressing the STOP touch pad switch will reset the fault
and clear the remaining time in the dry cycle.
F5
Temperature fault
The drying temperature is at least 25°F. above the temperature
setting. “F5” will flash on the 4-digit display and the dry cycle
will finish without calling for heat (energizing the gas valve).
The power to the dryer must be cycled to reset the controller.
Part # 8533-077-001 11/13
Wiring Schematic for 60hz Dryer -10
Part # 8533-077-001 11/13
5
Wiring Diagram for 60hz Dryer -10
6
Part # 8533-077-001 11/13
Wiring Diagram for 60hz Dryer -10BD
Part # 8533-077-001 11/13
7
Wiring Schematic for 50hz Dryer -39
8
Part # 8533-077-001 11/13
Wiring Diagram for 50hz Dryer -39
Part # 8533-077-001 11/13
9
Wiring Diagram for 50hz Dryer -39BD
10
Part # 8533-077-001 11/13
Wiring Schematic for 60hz Dryer -Electric Heat
Part # 8533-077-001 11/13
11
Wiring Diagram for 60hz Dryer -Electric Heat
12
Part # 8533-077-001 11/13
Wiring Diagram for 50hz Dryer -64FQ
Part # 8533-077-001 11/13
13
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