Malfunction Of Communication E6 - Friedrich MWM09Y1J Service & Parts Manual

TROUBLESHOOTING

Malfunction of Communication E6

Cut o power supply. Check if
connection line of IDU and ODU
and the wire inside electric box
are correctly connected.
Correct connection?
Main board matches
with display board? Main board of
IDU matches with that of ODU?
Communication cord is damaged?
Replace IDU's
main board
Malfunction eliminated?
97
Start
no
yes
yes
yes
no
no
yes
End
Connect the line
according to
wiring diagram.
no
Match correctly
no
according to product
speci cation
no
Replace
communication
cord
no
Replace ODU's
main board.
Malfunction eliminated?
yes
Malfunction eliminated?
yes
Malfunction eliminated?
yes