13
2. Indoor unit failure mode table
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table(9-4.).
12-time flash
2.5-second OFF
Replace the indoor electronic control
P.C. board.
Indoor control system
When 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 9-6.
A
"Check of indoor fan
motor".
Indoor fan motor
When the rotational frequency feedback
signal is not emit during the 12-seconds the
indoor fan operation.
2-time flash
2.5-second OFF
Refer to the characteristics of the main
indoor coil thermistor, the sub indoor coil
thermistor (9-7.).
Indoor coil thermistor
When the indoor coil thermistor short or open
circuit is detected every 8 seconds during
operation.
3-time flash
2.5-second OFF
Refer to 9-6.
D
"How to check mis-wiring
and serial signal error".
Serial signal
When the serial signal from outdoor unit is
not received for a maximum of 6 minutes.
1-time flash
every 0.5-second
Refer to the characteristics of the room
temperature thermistor (9-7.).
Room temperature
thermistor
When the room temperature thermistor short
or open circuit is detected every 8
seconds during operation.
Not lighted
–
Normal
–
Left lamp of OPERATION
INDICATOR lamp
Correspondence
Abnormal point
(Failure mode)
Condition
OB454qxp 06.3.22 4:30 PM Page 13
Summary of Contents for MSZ-GB50VA Series
Page 31: ...31 ...
