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Hitachi Yutaki M & Yutaki S fault 62

Central mismatch

Heat pump

What it means

Triggered in case YUTAKI CASCADE CONTROLLER is configured and they are received central messages, or central control is configured and they are received messages from YUTAKI CASCADE CONTROLLER. In case this alarm appears, software stops Indoor and Outdoor operations until system is properly configured. Option configurable from unit controller - displayed if system has been configured.

Likely causes

  1. Loose, disconnected, broken or short-circuited connector
  2. Configuration mismatch between cascade controller and central control

Where to start

  1. Check system configuration for cascade vs central control conflicts
  2. Check connector/wiring for faults
  3. Access Menu > Operation Information to view General system data: operation status, water setting temperature, outdoor ambient temperature, outdoor ambient 2 temperature, outdoor ambient average temperature, second ambient average temperature, 24h average temperature.

The full answer, free

  • 7 more checks in order
  • How to put it right, step by step
  • The manual page for this fault (page 330), 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 Hitachi manual for the Yutaki M & Yutaki S. Check the model on the data plate before you order parts.

Other Hitachi Yutaki M & Yutaki S fault codes