SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
89
3. Troubleshooting by Indication on the Remote
Controller
3.1
External Protection Device Abnormality
Remote
Controller
Display
A0
Applicable
Models
All indoor models
Method of Error
Detection
Detect open or short circuit between external input terminals in indoor unit.
Error Decision
Conditions
When an open circuit occurs between external input terminals with the remote controller set to
"external ON/OFF terminal".
Supposed
Causes
Actuation of external protection device
Improper field setting
Defective indoor unit PCB
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 may
b
e damaged.
Check the setting state of the
external O
N
/OFF inp
u
t
b
y
remote controller.
O
N
/OFF
inp
u
t from
o
u
tside (mode
N
o. 12,
first code
N
o. 1) has
b
een
set to external protection
de
v
ice inp
u
t (second
code
N
o. 03)
b
y remote
controller.
Replace the indoor
u
nit PCB.
Act
u
ation of external protection
de
v
ice.
Change the second code
N
o. to
"01" or "02" .
YES
N
O
N
O
YES
External
protection de
v
ice is
connected to terminals T1
and T2 of the indoor
u
nit terminal