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Mitsubishi · technician tips

Mitsubishi service menus, test modes and resets

2 tips for heat pump: access codes, button combinations, test modes and the resets you need at the appliance.

Jump to: Button combinations (1) · Service & test modes (1)

Button combinations

Key presses that open menus, show readouts or switch modes.

Read the error history with the wired remote self-check

Heat pump · Mr. Slim PEAD-RP JA(L) ducted indoor unit

Shows the stored check codes on the wired remote LCD; use it to read the last fault, not to run the unit.

  1. Turn the power on.
  2. Press the CHECK button twice.
  3. If system control is used, set the refrigerant address with the TEMP buttons.
  4. Read the check code on the LCD.
  5. End the self-check with the ON/OFF button.

Applies to: Mr. Slim PEAD-RP JA(L) ducted indoor units with PAR-21MAA wired remote

Source: Mitsubishi PEAD-RP35JA(L) Service Manual, 10-2 Self-Check Function, p.27. Written in our own words; check the manual for your exact model.

Service & test modes

Forced fan, low and high fire, test and diagnostic modes, error history and live data.

Start a test run from the wireless remote

Heat pump · Mr. Slim PEAD-RP JA(L) ducted indoor unit

Checks cooling and heating without waiting for a thermostat call; FAN, DRY and AUTO cannot be run in test run.

  1. Power the unit at least 12 hours ahead of the test run.
  2. Start with the remote display off; press the TEST RUN button twice in a row.
  3. Press MODE to select COOL and confirm cold air; press MODE again for HEAT and confirm warm air.
  4. Press FAN to check the fan speed changes and VANE to check the auto vane moves.
  5. Press ON/OFF to stop the test run.

Applies to: Mr. Slim PEAD-RP JA(L) ducted indoor units with PAR-21MAA wired remote

Source: Mitsubishi PEAD-RP35JA(L) Service Manual, 10-2 Self-Check Function, Test run, p.28. Written in our own words; check the manual for your exact model.

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Mitsubishi error codes

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For licensed technicians. Installer menus, test modes and access codes change settings that affect safety; only use them if you are trained on the appliance and understand the result. Gas, electrical and refrigerant work must be done by a qualified, licensed person, and the manufacturer’s manual for the exact model and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.