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SiUS28-902_a
Troubleshooting by Indication on the Centralized Remote Controller
Troubleshooting
146
4.3
“
M8
” Malfunction of Transmission between Optional
Controllers for Centralized Control
Remote
Controller
Display
M8
Applicable
Models
Centralized remote controller
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Malfunction of transmission between optional controllers for centralized control
Defect of P.C.B. of optional controllers for centralized control
Troubleshooting
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector, or parts co
u
ld
b
e damaged.
Is
transmission
w
iring
disconnected or
w
ired
incorrectly?
The P.C.B. of one of the optional
controllers for centralized control is
defecti
v
e. Try t
u
rning on/off
u
sing
each optional controllers for
centralized control, and replace the
P.C.B. of the one that is
u
na
b
le to
control the indoor
u
nit.
N
O
N
O
Fix the
w
iring correctly.
YES
YES
Has a once
connected optional
controller for centralized
control
b
een disconnected
or its address
changed?
T
u
rn on po
w
er s
u
pply for all
optional controllers for centralized
control.
Reset po
w
er s
u
pply sim
u
ltaneo
u
sly
for all optional controllers for
centralized control.
YES
N
O
Is
the po
w
er s
u
pply
t
u
rned on for all optional
controllers for
centralized
control?
Set reset s
w
itch to "normal."
YES
N
O
Is
the reset s
w
itch
of all optional controllers
for centralized control set
to
''
normal?
''
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