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Mitsubishi Ecodan fault 7

No water at hot tap

Heat pump

What it means

No water is available at the hot tap, which can be caused by the cold water main being shut off or a blocked strainer.

Likely causes

  1. Fault with FTC transmission/receiving circuit board
  2. Electrical noise causes interference with power supply
  3. Electrical noise causes interference with FTC-outdoor unit transmission cable
  4. Outdoor unit abnormal stop
  5. Cold main off
  6. Strainer (local supply) blocked

Where to start

  1. Turn the power to the indoor unit OFF and then ON
  2. Power to both the indoor unit and outdoor units should be switched OFF then ON
  3. Check for error code and contact number displayed alternately on remote controller

The full answer, free

  • 16 more checks in order
  • The readings and component tests from the manual
  • How to put it right, step by step
  • The manual page for this fault (page 54), right under the answer
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Safety: Isolate the outdoor unit and any backup heater, and give the inverter capacitors time to discharge before you open the electrics. Anything on the refrigerant circuit needs F-gas certification.

From the Mitsubishi manual for the Ecodan. Check the model on the data plate before you order parts.

Other Mitsubishi Ecodan fault codes