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Hitachi Yutaki M & Yutaki S fault 209

Sub DHW configured on unexisting module

Heat pump

What it means

Wrong configuration of the YCC controller where at least one Sub unit is configured as Sub DHW tank without any DHW Main unit present.

Likely causes

  1. Wrong configuration of the YCC controller
  2. At least one Sub unit configured as Sub DHW tank without any DHW Main unit

Where to start

  1. Check YCC controller configuration for Sub DHW tank assignment
  2. Verify presence of a DHW Main unit

The full answer, free

  • How to put it right, step by step
  • The manual page for this fault (page 336), 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.

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