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[45] communication among outdoors failure
check if communication wire
among outdoors is connected
check if communication
wire among outdoors is
broken down
if outdoor unit number
is set correctly
if there is interference in
the place where outdoor is
installed
supply of outdoor
master unit, search
outdoor again to
check if it is normal
normally
yes
no
yes
no
cut off power
no
replace PCB
no
re-connect
replace outdoor communication
yes
wire
no
re-set unit number
yes
remove the interference
272
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