mchild
12-04-2022, 02:00 AM
I have a Daikin VRV-S RXYMQ-M installed with four FXSQ-M indoor units in 2008. It has been a great system with sufficient heat to maintain the indoor set point temp with outdoor temps down to about 15*F (-9.5*C) without the need of supplemental heat.
This past summer I had two of the indoor units have fan speed relays on the circuit board fail (low speed relay). I purchased one new board, installed it on one of the air handlers with failed relay, and then had the failed relay on that removed board replaced and used that board to get the second air handler fully functional. Assuming the other two air handlers may also have relay failures, I continued to repair each board removed, repaired, and installed in the next in sequence air handler until all the air handlers had boards with new relays.
The question I have has to do with addressing the indoor units through the binary service mode on the outdoor unit. It has occurred to me that re-addressing was not done after repairs and circuit board swapping in the other air handlers. This past winter, without any other changes, the system could not maintain the indoor temps once the outdoor temps dropped below about 32*F (0*C). Is this failure to maintain indoor temp a possible result of not re-addressing?
Any insight is greatly appreciated.
This past summer I had two of the indoor units have fan speed relays on the circuit board fail (low speed relay). I purchased one new board, installed it on one of the air handlers with failed relay, and then had the failed relay on that removed board replaced and used that board to get the second air handler fully functional. Assuming the other two air handlers may also have relay failures, I continued to repair each board removed, repaired, and installed in the next in sequence air handler until all the air handlers had boards with new relays.
The question I have has to do with addressing the indoor units through the binary service mode on the outdoor unit. It has occurred to me that re-addressing was not done after repairs and circuit board swapping in the other air handlers. This past winter, without any other changes, the system could not maintain the indoor temps once the outdoor temps dropped below about 32*F (0*C). Is this failure to maintain indoor temp a possible result of not re-addressing?
Any insight is greatly appreciated.