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Hitachi Yutaki M & Yutaki S fault 60

All sub units are in alarm state or no communication

Heat pump

What it means

All Sub units are in alarm state or there is no communication with them. Alarm release occurs when issue disappears.

Likely causes

  1. Slave unit alarm
  2. Loss of communication with slave units
  3. Sub unit alarm

Where to start

  1. Check slave unit alarm states
  2. Check communication with slave units
  3. Check each Sub unit for alarm state

The full answer, free

  • 1 more check 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 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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