anybody got any ideas with this 1...

set up = 4 x mitsi elec mr slim large cassettes
indoor - PLH - 5GKHV
outdoor - PUH - 5YK2

all run off 1 remote control...

3 units run fine in both heating and cooling...

unit no 2.... doesnt kick in....no leds on pcb outsite...compressor sounds fine...

error code on remote is p8

misti elec tech guy said "check the outdoor board"

i thought i was playing give us a clue...

asked again for bit more details - "check the outdoor board"

now interestingly, the bypass solenoid valve is quite burned out, il post the pics in abit...

and the liquid reciever is quite burned also...

any 1 got any ideas please ?