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Model reference

Maytag MMH20AD2

Microwave

4 documents13 error codes7 service modes

Available documentation

Tech Sheet

  • Commercial Microwave—Technical Information16 pg
    Covers this model
  • Commercial Microwave—Technical Information16 pg
    Covers this model

Service Manual

  • Service Manual - MENUMASTER Commercial Microwave Oven53 pg
    Covers this model
  • Service Manual - 1602346353 pg
    Covers this model
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Error codes (13)

CodeMeaning
Err1Checksum failure on the power board.Err2Hardware problem on the power board.Err3Hardware problem related to keyboard.Err4Wrong jumper setting on the power board.Err5Shorted keypad detected (also triggered if touch panel is pressed for more than…Err6Options scrambled on the power board.Err7Problem with RTD (Resistance Thermal Device); additional digit indicates…Err70RTD uncalibrated.Err71RTD shorted.Err72RTD open.Err8Over temperature condition detected.Err9Over temperature with current less than 2 amps.HOTOver temperature during cook time; magnetron TCO has tripped

Service modes (7)

  • Convection Temperature Calibration["Door must be closed and unit must be in STANDBY mode.","Press HIDDEN PAD.","Press pads 1, 3, 5…
  • Convection Temperature Calibration Mode["Door must be closed and unit must be in STANDBY mode.","Press HIDDEN PAD.","Press pads 1, 3, 5…
  • Microwave Power Test (Service Test - Microwave)["Oven must be in STANDBY mode.","Close the door.","Press Hidden Pad, 1, 3, 5, 7, 9.","Press 3 to…
  • Microwave Service Test (Power Test)["Oven must be in STANDBY mode.","Close the door.","Press Hidden Pad, 1, 3, 5, 7, 9.","Press 3 to…
  • Service Test["Turn OFF oven by pressing PREHEAT ON/OFF (oven must be in STANDBY mode).","Press HIDDEN PAD…
  • Service Test Mode["Oven must be in STANDBY mode (press PREHEAT ON/OFF to turn off if needed).","Close the…
  • User Options Mode["STANDBY must display

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