Daiken vrv error u1-05

[tdhardbar2458]

I have a customer with numerous vrv's.
They had scheduled power shut down and another building was added to the grid down the street.
Of the 4 condensing unit groups 3 have this error code and 1 is running properly.
Reversed the phase on one 3 condenser set and now has u1-07 fault.
Any help would greatly be appreciated this hall has a retiree meeting in the morning and need to get the heat going. Thanks

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[fridg]

Try this app.

States 1st slave & 2nd Slave faults.

Daikin Service by Daikin Airconditioning UK Ltd
https://itunes.apple.com/au/app/daik...571282882?mt=8