36
2. Table of indoor unit failure mode recall function
Upper/Left lamp of
OPERATION
INDICATOR lamp
Abnormal point
(Failure mode)
Condition
Remedy
Not lit
Normal
—
—
1-time blink every
0.5-second
Room temperature
thermistor
The room temperature thermistor short or open
circuit is detected every 8 seconds during
operation.
Refer to the characteristics of the room temperature
thermistor (9-7.).
2-time blink
2.5-second OFF
Indoor coil
thermistor
The indoor coil thermistor short or open circuit is
detected every 8 seconds during operation.
Refer to the characteristics of the main indoor coil
thermistor, the sub indoor coil thermistor (9-7.).
3-time blink
2.5-second OFF
Serial signal
The serial signal from outdoor unit is not
received for a maximum of 6 minutes.
• Refer to 9-6. “How to check miswiring and serial
signal error”.
• Refer to “Check of compressor protector” of outdoor
unit service manual. (Except
GS30/36NA
)
11-time blink
2.5-second OFF
Indoor fan motor
The rotational frequency feedback signal is not
emit during the 12 seconds the indoor fan
operation.
Refer to 9-6. “Check of indoor fan motor”.
12-time blink
2.5-second OFF
Indoor control
system
It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.
Replace the indoor electronic control P.C. board.
NOTE
: Blinking patterns of this mode differ from the ones of Troubleshooting check table (9-4.).
OBH874A
