Service manual

16
4. Indoor unit failure mode table
5. PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode table
5-time flash
When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or 
PLASMA AIR PURIFYING unit) rises above 
the normal voltage value (3V).
4-time flash
PLASMA DEODORIZING/ 
PLASMA AIR PURIFYING
power
When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or 
PLASMA AIR PURIFYING unit) falls 
significantly. (0.4V / 0.5ms)
3-time flash
Refer to 9-6.F"Check of PLASMA 
DEODORIZING power" or 9-6.G"Check 
of PLASMA AIR PURIFYING power".
Abnormal electric
discharge error 1
When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or 
PLASMA AIR PURIFYING unit) falls by 0.9V 
below the normal voltage value (3V).
2-time flash
Spark discharge
1-time flash
PLASMA DEODORIZING/
PLASMA AIR PURIFYING 
power control
When the voltage between CN1 3(+)
and 2(GND) on the PLASMA POWER P.C.
board (in the PLASMA DEODORIZING or 
PLASMA AIR PURIFYING unit) falls below 
1.6V(spark discharge judgment voltage).
When PLASMA DEODORIZING and/or
PLASMA AIR PURIFYING power cannot be 
turned OFF even if the PLASMA operation is 
turned OFF with the remote controller.
POWER lamp
Correspondence
Abnormal point
(Failure mode)
Condition
Abnormal electric
discharge error 2
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (9-4.).
NOTE1 : Blinking patterns of this mode differ from the ones of Troubleshooting check table (9-4.).
NOTE2 : As soon as an abnormality is detected, PLASMA DEODORIZING power and/or PLASMA AIR PURIFYING
power goes OFF, therefore measuring instrument which records the voltage wave is required in order to
perform the above mentioned voltage measurement.
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 emitted during the 12-seconds 
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 the 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 –
POWER lamp
Correspondence
Abnormal point
(Failure mode)
Condition
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