I had a quad system Mitsubishi heat pump (MXZ-4B36NA, MSZGE09 (4), MSZGE15NA (1)) installed 08/11. It was installed by a professional but unfortunately he has moved and cant help me with the diagnosis.
A month ago, the light on the evaporator (interior units) started to blink after about 2-3 minutes of startup (same for all 4 evaps) and would then shut off.
I do not hear the compressor turn on anymore. The blinking LED on the evaps are supposed to give a blink pattern but they blink consistently without any pattern. So the compressor LED also have a blink pattern, so I figured I could use that to get to the failure mode table in the manual, but one of the 30 amp fuse (disconnect switch (2-30amp fuses) next to compressor) was blown. And at replacement and startup, the fuse blew again. Without power I cant read the compressor LED blink pattern to get to the failure mode table.
Any ideas why the disconnect switch fuse keeps blowing? I dont think its a charging issue, some sort of a short. Compressor?