[RE-wrenches] 3 stack Radian Problem

[William Miller]

Friends:

We have a 3 stack Radian system installed about two years ago. The customer had some health issues and is just moving into the new home. 

Over the weekend the system started strobing the AC output. One or more of the inverters was clicking and buzzing. 

Tech support diagnosed a faulty setting for power save. We adjusted as recommended but problem persists. 

On site, I found the clicking from transfer relays and a pop-buzz from one or both power units on inverter 3. When I unplugged the data cable to that inverter the noises stopped. 

The inverter data cables are all  new about 2 months to resolve the dreaded firmware mismatch problem. They are not shielded. I tried a new factory shielded cable on 3 but problem persists. 

I have been holding all morning for tech support. BTW pressing 2 for call-back does not work. 

Any help would be appreciated. I am stuck on site until this is resolved....

William Miller