DAIKIN multisplit, one head unit unresponsive

[hnglas]

Hi,
I have a Daikin multi split system running 3 head units. 2 are working perfectly, The other one suddenly will not switch on via remote control or on/off switch. This happened after a power cut while the unit was on. When the power came back on, the unit was still in the on position (vents open) but there are no lights and absolutely no response to the remote or the units on/off button. Testing shows the indoor head unit does have power, it's just unresponsive.

I've turned the power off at the box for 30 minutes – no change.
Remotes are working fine.

Any ideas?

[frank]

Have you tested for power at the outdoor unit where the indoor units are connected?

If you have power reaching the indoor unit, it may be the small fuse on the PCB