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Troubleshooting by Indication on the Remote Controller
SiUS28-902_a
137
Troubleshooting
3.40 “
U8
” Malfunction of Transmission between Main and
Sub Remote Controllers
Remote
Controller
Display
U8
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
In case of controlling with 2-remote controller, check the system using the microcomputer if
signal transmission between indoor unit and remote controller (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Malfunction of transmission between main and sub remote controller
Connection between sub-remote controllers
Defect of remote controller P.C.B.
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.
SS1
of
b
oth remote controllers is
set to "SUB."
Set SS1 to "MAI
N
"; the
po
w
er s
u
pply off once and
then
b
ack on.
Set one remote controller to
"MAI
N
"; the po
w
er s
u
pply off
once and then
b
ack on.
T
u
rn the po
w
er off and then
b
ack on. If a malf
u
nction
occ
u
rs, replace the remote
controller P.C.B.
YES
YES
YES
N
O
N
O
N
O
Using 2-remote
controllers control.
SS1
of remote controller P.C.B.s
is set to "MAI
N
."
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