Hello Everyone!

First time poster long time lurker , so please be nice to me

I have a issue that hopefully a daikin technician can help me with?

I have a Ducted AC Unit - Daikin RY200KUY1 with 2x Internal wired controllers BRC1B62.

History:
4 Weeks ago had a surge on the property and burnt the outdoor PCB - got that replaced with a new pcb after a daikin specialist came by and got it inspected etc.

Since then i cant get a hold of the specialist since the crazy heat in australia at the moment and theres a 1.5 week waiting to get a daikin techy which i cant just do in this heat.

So i changed the pcb etc and everything outside is ok in terms of error messages.

Issue:


Outside Unit:

Iv been reading service manuals and just maybe not understanding it properly.

Outside Unit has the HAP ( Green light blinking) and the H1 and H2 ( RED lights OFF) - so my understanding is that there is no issue with the outside unit but something to do with the inside - according to the service manual.

Inside Unit:


The two wired units ( BRC1B62) are wired up from top floor to bottom.

I kept getting the Error: Unit No. 0 U4 and Spanner/ eyetest icon blink on both units.

This error will only blink when i want AC on - but WILL not display with basic fan from the roof unit blower.

So i removed the 2nd controller ( BRC1B62) and kept just the one controller in MASTER mode ( behind the unit it requests i flick the switch to M) - Now only have 1 wired controller.


Temporary Solution:

Because i keep getting the error display on the wired unit controller and the outdoor AC wont turn on under NORMAL mode i have done the following according to the service manual:

- Running the outdoor unit under Emergency COOL mode
- Indoor Wired Controllers still blinking Error: Unit No. 0 U4 and Spanner/ eyetest icon blink on both units.
- Constant Cooling
- Only able to Turn on unit with this method and only the HAP ( Green blinking) - No other Red Light Errors - 3 Phase Circuit Breaker will turn ON and OFF the Outdoor Unit in Emergency COOL mode.

Everytime i would touch the Outdoor Unit i will allways turn off from the Switch Board and not at the Magnetic Switch Relay at the OutDoor Unit.

Any help will be very appreciated - with the heat and no techy available to come by i really need to get this fixed as i am worried running this way will damage the outdoor unit and having young kids around the house i cant leave for long time.

Thanks everyone for any help.

Have a Good Day!