American Dryer Corp AD-170 service manual Microprocessor reads Dsfl

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B. If voltage is not evident at both points (nos. 1 & 2 of the 15 pin modular connector located in computer box area) with respect to ground.

If no voltage at either two points...Problem is faulty 24 V XFMR (P/N 141403)

If voltage at one point, trace the voltage through the lint drawer switch and the main door switch and their connectors (J3 and J4), to the 15 pin modular connector 2.

If voltage stops at any one of the switches, replace the switch.

If voltage stops at a connector, check the termination or wire back to the prior connector.

8.Microprocessor reads "DSFL"

NOTE: Before continuing with this section check the .125 MA fuse on the computer board.

A. Replace the temperature sensor underneath the basket on a bracket (the bullet shaped device).

B. If it still reads "DSFL", unplug the 4 pin connector from the temperature sensor bracket. Also, unplug the microprocessor 15 pin connector from the computer board. Where the white/red striped wire is going into the connector, take a continuity reading across the wire and that same wire from the 4 pin connector that you unplugged earlier in this paragraph.

If there is no continuity, check for break in wire, a short to the ground, loose termination(s), or even replace the wire.

If there is continuity, do the same thing to the black wire right next to the white/red striped wire in the 15 pin connector.

If there is no continuity, check for break in wire, a short to ground, loose termination(s), or even replace the wire.

If there is continuity, computer board is faulty.

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Contents AD-170 AD-170 Retain This Manual In a Safe Place For Future ReferencePage For Your Safety Table of Contents Sail Switch Assembly Important Information Safety PrecautionsCleaning Routine MaintenanceLubrication AdjustmentsEnclosure, Air Supply, and Exhaust Requirements Installation RequirementsElectrical and Gas Requirements Operational Service Check ProcedureDSI Module Gas Models Only Computer Panel AssemblyDescription of Parts Control BoxBlower Motor and Impellor 50Hz, 60Hz Steam & 50Hz Gas Gas Burner AssemblyDrive Motor Blower Motor and Impellor Hz Gas Models OnlyBasket Tumbler Idler AssemblyTumbler Bearing and Pulley Arrangement Hi-Limit Gas Models Only Main Door SwitchSail Switch Gas Models only Steam Damper System Automatic Reset ThermostatLint Drawer Switch Lint DrawerIntroduction ServicingComputer Controls To Replace Computer To Replace Keyboard Label AssemblyTo Replace Microprocessor Temperature Sensor Probe Page To Replace Main Burner Orifices To Replace Gas Valve see burner illustration onTo Test and Adjust Gas Water Column Pressure To Convert from Natural Gas to L.P. Gas To Replace Burner Tubes To Replace DSI Module Sail Switch Assembly Gas Models Only To Adjust Sail Switch To Replace Sail SwitchTo Install New Main Door Glass To Replace Main Door AssemblyTo Replace Main Door Hinge Pad To Replace Front PanelTo Replace Small Idler Pulley Pulleys To Replace Tumbler PulleyTo Replace Motor Pulley To Replace Large Idler PulleyPage To Replace Tumbler Basket or Tumbler Basket Support Basket Alignment Lateral Side to Side AdjustmentImportant Never strike the shaft directly with a hammer To Replace Front Idler Shaft Pillow Block Bearing To Replace Front Basket Support Pillow Block BearingBelts See illustrations in section F Pulleys Belt Tension Adjustment Basket to IdlerTo Replace Rear Idler Shaft Pillow Block Bearing Motors To Replace Drive Motor Belt Tension Adjustment Motor to IdlerTo Replace V-Belts Page Impellor Lint Drawer Assembly To Replace Lint ScreenTo Replace Lint Drawer Switch Computer will not accept key pad entries TroubleshootingNo display on computer Drive motor runs, burner is on, but basket will not turn Dryer will not start, but computer display indicators are onDryer operates but is taking too long to dry Dryer operates, probe sparks, but gas does not flowOverload for impellor fan motor is tripping Dryer is cycling on burner hi-limit safety thermostatThermal overload for drive motor is tripping There is excessive vibration coming from the basket Display reads dSFL. Dryer Sensor Circuit FailureDryer does not start. Display reads door Electrical Trouble Shooting Diagnostic LED Display Failure Codes Phase 5 OPL System DiagnosticsLED Display Indicators Page Page Cycle Status LED Display/CodesCY F LED Display CodesFill Computer Logic and Wiring Diagram Fault CodesPage No Display Condition Page Blower motor does not operate, drive motor runs Door condition Microprocessor reads Dsfl Motor Plate High and Low Voltage Technical InformationInformation on the Data Label Data Label Contacting American Dryer Corporation ADCHOW to USE a Manometer Using a ManometerAD-170SE Tool List ADC450400 1- 02/27/98-50