>a__WcU[S^ <[c >a`V[e[a`Wc
replace outdoor PCB
check if indoor/outdoor PCB fuse
and transformer are normal
if failure is eliminated
replace indoor PCB
if communication wire
is broken
Are communication wire
S and supply wires L and
N properly connected?
Grounded well?
Is communication wire too
close to power cable, which
causes interference?
Confirm the fault indicator is
communication failure
Does indoor communication
indicator flash?
check the other
reasons
no
yes
change
defective parts
re-wiring
Confirm commumication failure
according to the fault code list
8) Communication error between indoor and outdoor units
yes
yes
S should not share
a multicore cable
with L and N
no
no
no
no
no
yes
yes
yes
re-wiring
-299-
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