SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
151
3. Troubleshooting by Indication on the Remote
Controller
3.1
External Protection Device Abnormality
Error Code
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 of indoor unit PCB
Troubleshooting
O
N
/OFF
inp
u
t from
condersing
u
nit (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.
Check the setting state of the
external O
N
/OFF inp
u
t
b
y
remote controller.
External
protection de
v
ice
is connected to terminals
T1 and T2 of the indoor
u
nit terminal
b
lock.
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
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.