American Dryer Corp AD-95 service manual Phase 6 OPL System Diagnostics

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SECTION VII

PHASE 6 OPL SYSTEM DIAGNOSTICS

IMPORTANT: You must disconnect and lock out electric, gas or steam supply before any covers or guards are removed from the machine to allow access for cleaning, adjusting, installation or testing of any equipment per OSHA (Occupational Safety and Health Administration) standards.

ALL major circuits, including door, microprocessor temperature sensor, heat and motor circuits are monitored. The Phase 6 OPL microprocessor controller (computer) will inform the user, via the L.E.D. display of certain failure codes, along with indicators both in L.E.D. display and at the output of each relay (and door switch circuit) to easily identify failures.

A.DIAGNOSTIC (L.E.D. DISPLAY) FAILURE CODES

1.SAIL SWITCH FAIL- This routine will prevent start up on the machine unless the sail switch is in the correct position. If the sail switch is closed prior to start up the display will read "SAIL SWITCH FAIL" along with an audio indication.

2.No AIR FLOW- If the sail switch opens during cycle operation the display will read "No AIR FLOW" along with an audio indication. The machine will continue to run with no heat for three (3) minutes or until the temperature drops below 100º F. Upon failure the machine will shut down and display "No AIR FLOW" with an audio indication.

3.bURNER SAFETY FAIL- Routine monitors the temperature above the burner. If the Burner Hi- Limit switch opens the display will read "bURNER SAFETY FAIL." The machine will run with no heat for three (3) minutes or until the temperature drops below 100º F. Upon failure the machine will shut down and display "bURNER SAFETY FAIL" with an audio indication.

4.dRUM SAFETY FAIL- This routine monitors the tumbler temperature if the tumbler Hi-Limit switch opens prior or during the cycle while the heat was on the machine will display "dRUM SAFETY FAIL." The machine will continue to run with no heat for three (3) minutes or until the temperature drops below 100º F. Upon failure the machine will shut down and display "dRUM SAFETY FAIL" with an audio indication.

5.No HEAT- This routine monitors the burner ignition. If the burner mis-ignites (does not light) the HSI (hot surface ignition) module will check to see of the microprocessor program has any retries left. The standard retry count is two (2). If the module notices that there are retries left it will purge for one (1) minute then try to ignite the burner again. The HSI module will try this for a total of three (3) times or until there are no retries left. If the burner does not ignite after three attempts the L.E.D. display will display the error code "no heat" with an audio indication. When this occurs the machine will run with no heat for three (3) minutes or until the temperature drops below 100º F.

IMPORTANT: For other countries, such as Australia, the retry count may not apply due to local approvals.

6.bURNER CONTROL FAIL- This routine monitors the ignition control's gas valve output response. If the valve output signal is not present from the ignition control within the valve time limits the Phase 6 microprocessor controller (computer) determines the ignition control has failed. If this occurs when the cycle is active the machine will display "bURNER CONTROL FAIL." If the tumbler temperature is above 100º F the machine will continue to display "bURNER CONTROL FAIL." The machine will run with no heat for three (3) minutes or until the temperature drops below 100º F. If the tumbler temperature is below 100º F upon failure the machine will shut down and display "bURNER CONTROL FAIL" with an audio indication.

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Contents AD-95/ML-95 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Troubleshooting Section Safety PrecautionsWeekly CleaningDays MonthsAdjustments Seven Days after Installation and every 6 MonthsLubrication Electrical and Gas Requirements Enclosure, Air Supply, and Exhaust RequirementsOperational Service Check Procedure As of February 11 Prior to February 11 Control Panel MicroprocessorWith fuses With circuit breaker Reversing Relay PanelHSI Module Gas Models Gas Burner AssemblyBlower Motor and Impeller Drive MotorTaperlock Trantorque Drive Shaft Assembly Transtorque Taperlock Idler Shaft AssemblyBasket Tumbler Main Door SwitchHi-Limit Gas Models Only Sail Switch Gas Models OnlyLint Screen Automatic Reset ThermostatLint Drawer Switch Computer Controls ServicingTo Replace Keyboard Label Assembly Ignition Controls To Remove Flame Sensor ProbeHSI Ignitor Flame Sensor Probe To Test and Adjust Gas Water Column Pressure To Replace Gas Valve See burner illustration onTo Replace Main Burner Orifices To Replace Burner Tubes To Convert Natural Gas to L.P. GasTo Replace HSI Module Discontinue power to the dryerSail Switch Assembly Gas Models Only To Replace Sail SwitchTo Adjust Sail Switch To Replace Main Door Assembly To Replace Main Door SwitchTo Install New Main Door Glass as of October 24 Front Panel and Main Door AssembliesAs of October 24 Prior to October 24 To Install new Main Door Glass prior of October 24 To Replace Front PanelTo Replace Main Door Hinge Block To Replace Drive Motor Pulley Pulleys To Replace Drive Shaft PulleyPage Tumbler Wheel Replacement on IdlerAssembly taper lock models To Replace Blower Shaft Pulley Tumbler Wheel Replacement on IdlerAssembly trantorque modelsTo Replace Blower Motor Pulley Basket AssemblyTo Replace Drive Assembly Pillow Block Bearing Belt Adjustment Motor to Drive AxleTo Replace Idler Shaft Pillow Block Bearing To Replace Drive Motor V-Belts MotorsTo Replace Impeller Motor Fan Shaft Drive To Replace Front Thruster Wheels To Replace Blower Motor V-beltsImpeller Rear AccessLint Screen Assembly To Replace Lint Door SwitchTo Replace Lint Screen Computer will not accept key pad entries No display on computer Dryer will not start, but computer display indictors are on Drive motor runs, burner is on, but basket will not turnBurner hi-limit safety thermostat is tripping Thermal overload for drive motor is trippingOverload for impeller fan motor is tripping There is excessive vibration coming from the basket Phase 6 OPL System Diagnostics Page E.D. Display Indicators E.D Display Indicator Number FAN Blower Output L.E.D. Indicator AIR AIR JET Output L.E.D. Indicator OptionalFuse Main Fuse Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Codes DRUM Safety Fail BURNER Safety FailBURNER Control Fail BURNER Flame FailComputer Logic and Wiring Diagram No Display Condition Blower motor does not operate, drive motor runs Drive motor reverses but does not forward, blower motor runsMain Door Condition Lint Door ConditionMicroprocessor Which Must be Reset Manually For example Technical InformationData Label HOW to USE a Manometer AD-95/ML-95 Tool List ADC450188 1- 01/14/99-25
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