Daikin Air System Problems Got Power but Nothing Happens?


Postby Sedea Man » Fri Feb 09, 2018 3:46 pm

Hi there,

I have a Daikin air/air system which gives me heat in winter and air con in summer. I have 3 external units (Inverter 5MXS 90E) and 13 internal units (FXTS25C).

5 of the internal units stopped working at the same time. They are all connected to the same exterior unit and breaker. The breaker is fine. All 5 have power and the usual solid green light. They do everything except operate. They open/close etc. Receive commands from the remote control.

I called an engineer out to look and they say that they need to replace 5 x R2T probes. 1 per each of the 5 units. This seems unlikely to me. The external fan doesn't turn but guess that's because the internal units aren't working.

Is the problem likely to have occurred in all 5 units at the same time?

The other 8 internal units and 2 external units are fine.

Thank you,

Stuart Wallace
Sedea Man
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