ADC ML-190, ML-175 service manual Troubleshooting

Page 20

To Replace Lint Drawer Switch

Disconnect electrical power to the dryer. Remove lint drawer and lint door.

Disconnect both 4-pin connectors at the rear of the lint switch cover.

Remove the one or two screws holding the lint switch cover on.

Remove lint switch cover and disconnect the two terminals of the switch.

Remove switch by pressing tabs together and push switch out.

Install new switch by reversing procedure.

Troubleshooting ______________________

IMPORTANT: You must disconnect and lockout the electric supply and the gas supply or the 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 standards.

The information provided will help isolate the most probable component(s) associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken/shorted wire may be at fault where electrical components are concerned...and not necessarily the suspected component itself.

IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the fuse being replaced. The information provided should not be misconstrued as a handbook for use by an untrained person in making repairs.

! WARNING

All service and troubleshooting should be performed by a qualified professional or service agency.

While making repairs, observe all safety precautions displayed on the dryer or specified in this manual.

No L.E.D. display on microprocessor controller

(computer)...

Open circuit breaker switch or blown fuse. Tripped blower motor overload.

Faulty wiring connection. Faulty transformer.

“Emergency Stop” (E-Stop) button is depressed. Faulty microprocessor controller (computer).

Computer will not accept keypad entries...

Keypad ribbon is not plugged into computer securely. Faulty keypad.

Faulty microprocessor controller (computer).

Dryer will not start, but computer

L.E.D. indicators are on...

Failed contactors.

Failed arc suppressor board.

Failed microprocessor controller (computer). Failed motors.

Blower motor runs, burner is on,

but tumbler will not turn...

Broken, damaged or loose V-belt.

Damaged or misadjusted drive wheels.

Loose or broken pulley.

Dryer operates but is taking too long to dry...

Improperly programmed microprocessor controller (computer).

An inadequate exhaust ductwork system. Restriction in exhaust system. Insufficient make-up air.

Dirty or clogged lint screen.

Washing machine extractors are not performing properly.

The supply gas may have a low heating value, check with local gas supplier.

Failed temperature sensor (temperature calibration is incorrect).

Failed microprocessor controller (computer).

Thermal overload for drive motor is tripping...

Either an exceptionally low or high voltage supply. Motor bearing failure.

Motor vents are blocked with lint. Failed motor.

Failed overload. Insufficient make-up air.

20

American Dryer Corporation

450431 - 3

Image 20
Contents ML-175 / ML-190 American Dryer CorporationRetain This Manual in a Safe Place for Future Reference Date of Purchase Model no RESELLER’S Name Serial NumbersTable of Contents Routine Maintenance Safety PrecautionsCleaning Important InformationInstallation Requirements Operational Service Check Procedure Description of PartsCompressed Air Requirements Electrical and Gas RequirementsGas Burner Assembly Reversing Relay PanelSteam Coil and Damper System Steam Coil pH LevelIdler Shaft Assembly Rotational Sensor AssemblySpeed Reducing Shaft Drive ShaftMain Door Switch Sail Switch Gas Models OnlyBurner Hi-Limit Gas Models Only Tumbler Hi-LimitIntroduction Lint Drawer Switch Computer ControlsLint Drawer Ignition Controls Page To Replace Burner Hi-Limit Thermostat Gas Models Only ThermostatsTo Convert from Natural Gas to L.P. Gas Sail Switch Assembly Gas Models Only Front Panel and Main Door AssembliesTo Install New Main Door Glass PulleysTo Replace Front Panel To Replace Drive Shaft PulleysTumbler Alignment BearingsTo Replace Motor Pulley To Replace Drive/Idler Shaft Pillow Block BearingsTo Replace Rear Tumbler Shaft Support Wheels Rotational Sensor Switch ReplacementTo Replace Speed Reducing Shaft Bearings Motors Basket and SupportBelts Lint Drawer Assembly ImpellorTo Replace Fan Shaft and/or Fan Shaft Bearings To Replace Lint ScreenTroubleshooting Phase 6 OPL System Diagnostics Diagnostic L.E.D. Display Failure CodesBurner hi-limit safety thermostat is tripping Overload for impellor fan motor is trippingD. Display Indicators D. Display Indicator NumberFAN Blower Output L.E.D. Indicator AIR AIR JET Output L.E.D. Indicator OptionalHT1 Heat Output L.E.D. Indicator Fuse Main Fuse Input L.E.D. IndicatorPhase 7 OPL System Diagnostics Input / Output Board L.E.D. Indicators Technical InformationMotor Plate High and Low Voltage ExampleUsing a Manometer How To Use a ManometerData Label Tool List450431 ADC Part No 3 06/17/08