One Indoor Unit in Multisplit System Not Cooling Air
We had a new Mitsubishi multi split system installed early this year with one outdoor unit hooked to 5 indoor units.
Couple weeks ago we were turning on the entire system for the first time (we had a long indoor furnishing work done by ourselves) and found two of the 6k indoor units had problems:
1) One of the 6k unit does not produce cool air
2) while the other one would automatically shut off due to communication problem with the outdoor unit (per troubleshooting guide based on indicator flashing pattern).
The installer sent a tech to troubleshoot and fiddle a bit with the wire and got the unit with communication problem working. The unit that was not producing cool air was not fixed i.e. substantially warmer air compared to other units in cooling mode, and the room in which the unit is located in never reach target tempeature 74F.
The tech could not find any problem with the unit and right now we are at a lost in what to do. I appreciate if anyone with experience with heat pump system could possibly shed some light on the situation.
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