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Midea Heat pump fault HH

Repeated DC fan motor protection lockout

Heat pump

What it means

Escalation fault displayed when H6 (DC fan motor protection) occurs 10 times within 120 minutes, requiring manual intervention.

Likely causes

  1. Persistent fan motor failure, chronic power supply issue, repeated fan obstruction
  2. Repeated H6 fan motor protection events (10 times within 120 minutes)
  3. Persistent fan motor or power supply fault causing repeated low-speed trips
  4. Refrigerant leak from container or system
  5. Damage to cables
  6. Excessive number of connections
  7. Terminals not made to original specification
  8. Damage to seals
  9. Incorrect fitting of glands

Where to start

  1. Investigate root cause of repeated H6 protection events, repair or replace fan motor
  2. Check history/count of H6 occurrences
  3. Investigate root cause of repeated fan speed faults (wind, obstruction, motor, power supply)

The full answer, free

  • 9 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 28), 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 Midea manual for the Heat pump. Check the model on the data plate before you order parts.

Other Midea Heat pump fault codes