American Dryer Corp AD-170 Phase 5 OPL System Diagnostics, Diagnostic LED Display Failure Codes

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A. Phase 5 OPL System Diagnostics

All major circuits, including door, microprocessor temperature sensor, heat and motor circuits are monitored. The Phase 5 OPL microprocessor controller will inform the user, via the LED display, of certain failure codes, along with indicators both in the LED display and the outputs of each relay, (and door switch circuit) to easily identify failures.

Diagnostic (LED Display) Failure Codes

1."door" - indicates door switch circuit is open.

a.Keyboard entry was made while main door or lint drawer is open, or

b.There is a fault in the door switch circuit (external of the Phase 5 OPL microprocessor controller)

2."dSFL" - indicates a fault in the microprocessor temperature circuit.

If fault is detected in the microprocessor heat sensor circuit, the display will read "dSFL", and the

tone (buzzer) will sound for approximately 5 seconds every 30 seconds until...

a. The problem is corrected, or

b.Power to the dryer is discontinued and the problem is then corrected

IMPORTANT: The Phase 5 OPL microprocessor controller has its own internal heat sensing circuit fuse protection located on the back side of the Phase 5 OPL computer. If a "dSFL" condition occurs, check to see if this fuse has blown. If it has, DO NOT replace the entire Phase 5 OPL microprocessor controller, replace the fuse and do so with a 1/8 amp (Slo-Blo) fuse ONLY.

NOTE: Once the Phase 5 OPL microprocessor controller detects a problem in the heat circuit, it updates every 30 seconds. If the problem was a loose connection in this circuit which corrected itself, the "dSFL" condition would automatically be cancelled.

3."SEFL" - indicates rotational sensor circuit failure meaning that there is a fault somewhere in the basket (tumbler) rotation detection circuit, or the Phase 5 OPL microprocessor controller programrelated to this circuit (Program Location 2) is set incorrectly in the active mode (SEn) where the dryer is not equipped with the optional rotational sensor and should be set in the non-active mode (nSEn).

4."Hot" - indicates a possible overheating condition. The Phase 5 OPL microprocessor controller monitors the temperature in the dryer at all times. If the microprocessor controller detects that the temperature in the dryer has exceeded 220º F (104ºC), it will disable all outputs (shut the dryer down), the tone (bUZ) will sound for approximately 5 seconds, and the LED display will read "Hot" until the temperature has dropped to 220º F or lower and the Phase 5 OPL microprocessor controller is manually reset by pressing the "Clear/Stop" key.

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Contents AD-170 Retain This Manual In a Safe Place For Future Reference AD-170Page For Your Safety Table of Contents Sail Switch Assembly Safety Precautions Important InformationRoutine Maintenance CleaningAdjustments LubricationInstallation Requirements Enclosure, Air Supply, and Exhaust RequirementsOperational Service Check Procedure Electrical and Gas RequirementsControl Box Computer Panel AssemblyDescription of Parts DSI Module Gas Models OnlyBlower Motor and Impellor Hz Gas Models Only Gas Burner AssemblyDrive Motor Blower Motor and Impellor 50Hz, 60Hz Steam & 50Hz GasTumbler Bearing and Pulley Arrangement Idler AssemblyBasket Tumbler Sail Switch Gas Models only Main Door SwitchHi-Limit Gas Models Only Lint Drawer Automatic Reset ThermostatLint Drawer Switch Steam Damper SystemServicing IntroductionTo Replace Keyboard Label Assembly Computer Controls To Replace ComputerTo Replace Microprocessor Temperature Sensor Probe Page To Replace Gas Valve see burner illustration on To Replace Main Burner OrificesTo 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 Replace Sail Switch To Adjust Sail SwitchTo Replace Main Door Assembly To Install New Main Door GlassTo Replace Front Panel To Replace Main Door Hinge PadPulleys To Replace Tumbler Pulley To Replace Small Idler PulleyTo Replace Large Idler Pulley To Replace Motor PulleyPage Basket Alignment Lateral Side to Side Adjustment To Replace Tumbler Basket or Tumbler Basket SupportImportant Never strike the shaft directly with a hammer To Replace Front Basket Support Pillow Block Bearing To Replace Front Idler Shaft Pillow Block BearingTo Replace Rear Idler Shaft Pillow Block Bearing Belt Tension Adjustment Basket to IdlerBelts See illustrations in section F Pulleys To Replace V-Belts Belt Tension Adjustment Motor to IdlerMotors To Replace Drive Motor Page To Replace Lint Drawer Switch Lint Drawer Assembly To Replace Lint ScreenImpellor No display on computer TroubleshootingComputer will not accept key pad entries Dryer will not start, but computer display indicators are on Drive motor runs, burner is on, but basket will not turnDryer operates, probe sparks, but gas does not flow Dryer operates but is taking too long to dryThermal overload for drive motor is tripping Dryer is cycling on burner hi-limit safety thermostatOverload for impellor fan motor is tripping Dryer does not start. Display reads door Display reads dSFL. Dryer Sensor Circuit FailureThere is excessive vibration coming from the basket Electrical Trouble Shooting Phase 5 OPL System Diagnostics Diagnostic LED Display Failure CodesLED Display Indicators Page Page LED Display/Codes Cycle StatusLED Display Codes CY FFill Fault Codes Computer Logic and Wiring DiagramPage No Display Condition Page Blower motor does not operate, drive motor runs Door condition Microprocessor reads Dsfl Technical Information Motor Plate High and Low VoltageData Label Contacting American Dryer Corporation ADC Information on the Data LabelUsing a Manometer HOW to USE a ManometerAD-170SE Tool List ADC450400 1- 02/27/98-50
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