Gree Multi over cooling

[Gary]

A friend has just installed a Gree Multi to service two rooms. One of the rooms seems to be working normally while the other room over cools and freezes the indoor coil. No error codes. Any idea what might cause this?

[martinw58]

have you checked the interconnecting wiring is not crossed

[Gary]

I will definitely check that. Thanks.

[Gary]

You were right. The wires were crossed. We swapped them back and everything works. Thanks.

[martinw58]

you shod always run each unit independently on first start up this way you will no the piping and wiring are correct