American Dryer Corp AD-170 service manual Blower motor does not operate, drive motor runs

Page 57

4.Blower motor does not operate, drive motor runs.

A.Check for voltage across terminals A1 and A2 of the impellor contactor. This is the single contactor in the rear control box.

If voltage is present check for voltage across the blow motor. If there is voltage at the blower motor replace the motor.

If there is no voltage at the blower motor, problem is bad wire(s) or termination(s) between the contactor and the motor or a bad impellor contactor.

B.If there is no voltage present at A1 and A2 of the contactor, check for voltage across the two BS3 terminals of the arc suppressor board.

If there is voltage present at the two BS3 terminals, problem is bad wire(s) or termination(s) between the two BS3 terminals and the coil (A1 and A2) terminals.

If there is no voltage across the two BS3 terminals, check for voltage across the two AS3 terminals.

If there is voltage across the two AS3 terminals and there is no voltage between the two BS3 terminals, replace the arc suppressor board.

C.If there is no voltage across the two AS3 terminals, problem is bad wire(s) or termination(s) between the two AS3 terminals and the computer board 15 pin connector no. 5, or faulty computer.

5."No Heat" drive & blower motors run, display reads normal (Gas Models).

A.Check for voltage across terminal block nos. 3 and 7.

If no voltage is present, problem is bad wire or broken terminal from terminal block no. 3 to MP harness connector pin 4.

B.If voltage is present, check for voltage across terminal block nos. 4 and 7.

If no voltage is present, problem is bad wire or broken terminal from terminal block 3 to tumbler hi-limit switch and back to terminal block no. 4, or faulty tumbler hi-limit switch.

C.If voltage is present, check for voltage across DSI module "TH" and "GND".

If no voltage is present, check voltage through the sail switch and burner hi-limit harness against ground. Also check for voltage at the terminals of both components. If voltage is not passing through any one of the two components, replace that component.

D.If voltage is present, refer to DSI technical manual (P/N 450119), or if equipped withADC style DSI module refer to technical manual (P/N 450142).

53

Image 57

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 ProcedureDescription of Parts Computer Panel AssemblyControl Box DSI Module Gas Models OnlyDrive Motor Gas Burner AssemblyBlower Motor and Impellor Hz Gas Models Only Blower Motor and Impellor 50Hz, 60Hz Steam & 50Hz GasIdler Assembly Tumbler Bearing and Pulley ArrangementBasket Tumbler Main Door Switch Sail Switch Gas Models onlyHi-Limit Gas Models Only Lint Drawer Switch Automatic Reset ThermostatLint Drawer Steam Damper SystemIntroduction 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 BearingBelt Tension Adjustment Basket to Idler To Replace Rear Idler Shaft Pillow Block BearingBelts See illustrations in section F Pulleys Belt Tension Adjustment Motor to Idler To Replace V-BeltsMotors To Replace Drive Motor Page Lint Drawer Assembly To Replace Lint Screen To Replace Lint Drawer SwitchImpellor Troubleshooting No display on computerComputer will not accept key pad entries 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 flowDryer is cycling on burner hi-limit safety thermostat Thermal overload for drive motor is trippingOverload for impellor fan motor is tripping Display reads dSFL. Dryer Sensor Circuit Failure Dryer does not start. Display reads doorThere is excessive vibration coming from the basket 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