TradeAssistIQHome

Daikin Altherma fault H0-00

Outdoor unit: voltage/current sensor problem

Heat pump

What it means

Compressor voltage (DC) is out of range before start-up.

Likely causes

  1. Faulty main PCB
  2. Faulty inverter PCB
  3. Faulty or disturbance of the power supply (power supply MUST be within range of nominal operating voltage ±4%)
  4. Power drop
  5. Short circuit
  6. Thermal interface grease NOT applied properly on the heat sink

Where to start

  1. Perform a check of the main PCB
  2. Perform a check of the inverter PCB
  3. Check if the power supply is compliant with the regulations

The full answer, free

  • 5 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 46), right under the answer
Ask about H0-00 freeCreate a free account

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 Daikin manual for the Altherma. Check the model on the data plate before you order parts.

Other Daikin Altherma fault codes