Moyer Diebel 501HTN, 401HTN, 201LT Diagnostic testing for p/n 0712105 solid state timer board

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Timer Board Diagnostic Testing

diagnostic testing for p/n 0712105 solid state timer board

-effective serial # W081217467 and up

1before testing, turn the power switch OFF and allow the machine to complete the drain cycle.

check incoming voltages

2Open the door

If the green cycle indicator light blinks, the dOOr sWItch and cyclE lIght work Note: this function times out after 10 seconds

close the door

3Press and release the start sWItch

If the green cycle indicator light flashes the start switch works

indicator light

POWER

PRIME

SC

START

4Press and release the scrub/Ext Wash switch if equipped

If the green indicator light for the scrub switch flashes, the scrub/ext wash switch works

5to test the timer board and the following components, press and release the start switch 3 times with the door closed

If the components listed below are operating properly, they should run consecutively for a few seconds each

•fill valve

•detergent pump

•rinse-aid pump

•drain valve opens

•drain valve closes

•wash pump

•drain pump or sanitizer pump (if applicable)

indicator light

POWER

PR

SCRUB

START

POWER

PRIME

SC

START

PrEss start

3 tImEs

If one or more components do not run, see below

cONdItION

One of the components in step 5 does not run the wash pump is the only component that runs

the wash pump is the only component that will not run and the 4 amp fuse is good

None of the components run in step 5

POssIblE causE/sOlutION

check the component that did not run check the 4 amp fuse on the timer board

check pump motor/see troubleshooting guide

check neutral wire/see troubleshooting guide

0512979

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Contents Undercounter Dishwashers Page Register Your Product Online Product Registration Card Revision History Revision History This Intentionally Left Blank BlankLimited Warranty Limited WarrantyTable of Contents Model Description 201-HT, 401-HT, and 501-HT ModelsInstallation ReceivingElectrical Connections L1 L2 L3 NFor machines built prior to S/N Electrical Connections Booster Heater/Wash Tank Heater Interlock Circuit Water Connections Drain Connections Filling the Booster Initial Start-upFor Models 501HT, 401HT, and 201HT Check List All ModelsChemical Dispensing Pumps Models 501HT, 501HTN, 401HT, 401HTN, 201HT, 201HTNChlorine bleach solution Models 501LT and 201LTChemical Dispensers Models 501LT, and 201LTChemical Dispensing Pump Speed and Tank Fill Adjustments Normal Wash Cycle 501HT Control PanelRinse Sentry Feature ModelDishwasher Drain Operation Cleaning Daily-End of the DayDaily-End of the Day After Meal Period or Every 8 Hours Maintenance Schedule Condition Cause Solution This Intentionally Left Blank Service Replacement Parts Service Replacement PartsWash Pump/Motor Assy All Models All Models Wash Pump/Motor Assy Part Description QtyWash Tank, Drain, Scrap Screens All Models All Models Wash Tank, Drain, Scrap Screens HEATER, 120VAC 750WBuilt-in Electric Booster 201HT, 401HT, 501HT Prior to S/N W14478 Must be ordered with P/N 0512108 ThermostatBase Electrical Components All Models 201HT, 401HT, 501HT201LT, 501LT Prior to S/N W14236 All Models Base Electrical ComponentsBeginning with S/N W14236 and above All S/NsFill Piping All Models All Models Fill Piping VALVE, Fill 5.0 GPM Breakdown on nextFill Valve Assy All Models All Models Fill Valve Assy Fill Chute Assy All Models All Models Fill Chute Assy Sprayarm Assy. All Models All Models Sprayarm Assy Drain Manifold Assy CompleteMain Terminal Block, Timer Board All Models All Models Main Terminal Block, Timer Board Part DescriptionRinse-aid/Sanitizer Chemical Dispensing Pump All Models All Models Rinse-aid/Sanitizer Chemical Dispensing Pump Detergent Chemical Dispensing Pump All Models All Models Detergent Chemical Dispensing Pump Wash Rinse Control Panel 201HT/HTN, 201LT, 401HT/HTN, 501LT201HT/HTN, 201LT, 401HT/HTN, 501LT Control Panel Control Panel with Digital Display 501HT, 501HTN 501HT, 501HTN Control Panel with Digital Display Door Assembly All Models All Models Door Assembly Panel Assembly All Models All Models Panel Assembly Dish Racks Electrical Schematics Electrical SchematicsLow Temp. 201LT, 501LT All S/N’s High Temp.- All S/N’s 201HTN, 401HTN, 501HTN High Temp. 201HT, 401HT Prior to S/N Beginning with S/N 14236 201HT, 401HT High Temp Single Phase High Temp. 501HT Prior to S/NBeginning with S/N 14236 501HT High Temp Timer Chart All Models Basic Service Basic ServiceDigital Temperature Display Board Digiital Temperature Display Board 501HT0512106 Digital temperature Display coDes Timer Connection Diagram All Models Troubleshooting Guide Diagnostic testing for p/n 0712105 solid state timer board Timer Board Diagnostic Testing

201HTN, 401HT, 201HT, 501LT, 201LT specifications

Moyer Diebel is renowned for its exceptional line of commercial dishwashing machines, and the Moyer Diebel 501HTN, 501HT, 401HTN, 201LT, and 501LT models are among the industry's finest. These machines are designed to enhance efficiency, usability, and sustainability in the fast-paced environments of restaurants, cafeterias, and catering businesses.

The Moyer Diebel 501HTN model boasts high-temperature sanitization capabilities, making it ideal for establishments requiring rigorous hygiene standards. This unit features a compact design yet offers robust performance, incorporating an advanced wash system that ensures thorough cleaning of dishware, utensils, and glassware. The 501HTN is equipped with a powerful pump and a low-water consumption feature, promoting efficient operation while maintaining excellent cleaning results.

Similar to the 501HTN, the Moyer Diebel 501HT offers high-temperature washing but is optimized for slightly different applications. This model caters to establishments with a varied volume of dishware, providing flexibility and adaptability without compromising cleaning power. Its user-friendly interface simplifies operation while a dashboard display allows for easy monitoring of wash cycles and temperatures.

The Moyer Diebel 401HTN is designed for establishments that require a balance of performance and compact size. Although slightly smaller, the 401HTN does not sacrifice cleaning effectiveness. Its energy-efficient design is complemented by a powerful heating element that enables rapid temperature recovery, ensuring that wash cycles remain efficient even during peak hours.

In contrast, the Moyer Diebel 201LT is a low-temperature machine, making it suitable for users who prefer to operate using chemical sanitization. This model features an intuitive design, providing easy access for loading and unloading dishware. The 201LT’s energy-saving mode reduces water and energy consumption while maintaining an effective sanitizing process.

Lastly, the Moyer Diebel 501LT model continues the trend of efficiency and effectiveness but stands out for its durable construction and ease of maintenance. With its low-temperature technology, it caters to establishments focused on efficiency without the need for high-temperature water, making it a cost-effective option in terms of energy use and water consumption.

All these models are underpinned by Moyer Diebel's commitment to quality and innovation, ensuring long-lasting performance and reliability. With user-friendly designs and advanced technologies, these machines collectively enhance kitchen operations, ultimately contributing to a cleaner, more efficient, and sustainable dining experience.
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