what is PAR Board in x-series 5kva Solarmax inverter?

[zubi864]

Assalamualaikum,
I am from Pakistan, I have two of 5kva inverters installed on office. One of the got malfunction(not turning on and relay was ticking and lcd blinking). i went to the solarmax repairing centre for repair. After repairing they gave to me in working condition but one of the kit is missing inside. can you please tell, what it is for?
I checked for information and I found its name as PAR board in pdf named SERVICE MANUAL

 

[floydR]

Parallel board? used link up to 8 inverters together
later floyd

 

[Si boora]

Assalamualaikum,
I am from Pakistan, I have two of 5kva inverters installed on office. One of the got malfunction(not turning on and relay was ticking and lcd blinking). i went to the solarmax repairing centre for repair. After repairing they gave to me in working condition but one of the kit is missing inside. can you please tell, what it is for?
I checked for information and I found its name as PAR board in pdf named SERVICE MANUAL

Hi my solar inverter charge doing the same fault witch board did you replace thanks.