Table of Contents
Advertisement
2. Table of indoor unit failure mode recall function
Upper/left*1 lamp
Abnormal point
of OPERATION
(Failure mode)
INDICATOR lamp
Not lit
Normal
1-time blink every
Room temperature
0.5-second
thermistor
Indoor coil
2-time blink
2.5-second OFF
thermistor
3-time blink
2.5-second OFF
Serial signal
(CP30)
11-time blink
Indoor fan motor
2.5-second OFF
12-time blink
Indoor control
2.5-second OFF
system
14-time blink *2
Refrigerant
2.5-second OFF
circuit
*1 Upper lamp (MS-CP13/18/24VA)
Left lamp (MS-CP30VA)
*2. A blinking pattern when "14-time flash" is displayed :
2.5-second
OFF
ON
OFF
OBH782A
Condition
—
The room temperature thermistor short or
open circuit is detected every 8 seconds dur-
ing operation.
The indoor coil thermistor short or open circuit
is detected every 8 seconds during operation.
The serial signal from outdoor unit is not re-
ceived for a maximum of 6 minutes.
The rotational frequency feedback signal is
not emitted for 12 seconds after the indoor fan
motor is operated.
It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.
Refer to 9-4. No.4 "Condition".
3.0-second
14-time
2.5-second
ON
flash
Beeps
Repeated cycle
NOTE: Blinking patterns of this mode differ from the ones of
TROUBLESHOOTING CHECK TABLE (9-4.).
Refer to the characteristics of the room temperature
thermistor (9-7.).
Refer to the characteristics of the indoor coil thermistor
(9-7.).
Refer to 9-6.
signal error".
Refer to 9-6.
Replace the indoor electronic control P.C. board.
Refer to 9-4. No.4 "Remedy".
3.0-second
14-time
OFF
ON
flash
Beeps
Repeated cycle
22
Remedy
—
"How to check miswiring and serial
"Check of indoor fan motor".
Advertisement
Table of Contents
