16
2. Indoor unit failure mode table
NOTE :
Blinking patterns of this mode differ from the ones of Troubleshooting check table (10-4.).
12-time flash
2.5-second OFF
Replace the indoor electronic control
P.C. board.
Indoor control system
It cannot properly read data in the
nonvolatile memory of the indoor electronic
control P.C. board.
11-time flash
2.5-second OFF
Refer to 10-6.
A
"Check of indoor fan
motor".
Indoor fan motor
The rotational frequency feedback signal is
not sent out for 12-seconds after indoor fan
motor is opeated.
2-time flash
2.5-second OFF
Refer to the characteristics of the main
indoor coil thermistor, the sub indoor coil
thermistor (10-7.).
Indoor coil thermistor
The indoor coil thermistor short or open
circuit is detected every 8 seconds during
operation.
3-time flash
2.5-second OFF
Refer to 10-6.
D
"How to check mis-wiring
and serial signal error".
Serial signal
The serial signal from outdoor unit is
not received for 6 minutes.
1-time flash
every 0.5-second
Refer to the characteristics of the room
temperature thermistor (10-7.).
Room temperature
thermistor
The room temperature thermistor short
or open circuit is detected every 8 seconds
during operation.
Not lighted
—
Normal
—
Upper lamp of OPERATION
INDICATOR lamp
Correspondence
Abnormal point
(Failure mode)
Condition
