MITSUBISHI ELECTRIC MSZ-FA35VA User Manual
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4. Indoor unit failure mode table
NOTE: Blinking patterns of this mode differs from the ones of Troubleshooting check table(9-4.).
5. PLASMA DEODORIZING/PLASMA AIR PURIFYING power failure mode table
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 12-second the
indoor fan operation.
2-time flash
2.5-second OFF
Refer to the characteristic 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 miswiring
and serial signal error".
Serial signal error
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
–
POWER lamp
Check point
Abnormal point
(Failure mode)
Detection method
5-time flash
Refer to 9-6.
F
"Check of PLASMA
DEODORIZING power" or 9-6.
G
"Check
of PLASMA AIR PURIFYING power".
When the voltage between CN1
1
(+)
and
2
(GND) on the PLASMA POWER P.C.
board (PLASMA DEODORIZING or PLASMA
AIR PURIFYING) rises above the normal
voltage value (3V).
4-time flash
Refer to 9-6.
F
"Check of PLASMA
DEODORIZING power" or 9-6.
G
"Check
of PLASMA AIR PURIFYING power".
PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power
When the voltage between CN1
1
(+)
and
2
(GND) on the PLASMA POWER P.C.
board (PLASMA DEODORIZING or PLASMA
AIR PURIFYING) 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
1
(+)
and
2
(GND) on the PLASMA POWER P.C.
board (PLASMA DEODORIZING or PLASMA
AIR PURIFYING) falls 0.9V below the normal
range voltage.
2-time flash
Refer to 9-6.
F
"Check of PLASMA
DEODORIZING power" or 9-6.
G
"Check
of PLASMA AIR PURIFYING power".
Replace the indoor electronic control P.C.
board.
Spark discharge
1-time flash
PLASMA DEODORIZING/
PLASMA AIR PURIFYING
power control
When the voltage between CN1
1
(+)
and
2
(GND) on the PLASMA POWER P.C.
board (PLASMA DEODORIZING or PLASMA
AIR PURIFYING) falls below 1.6V(spark
discharge judgment voltage).
When PLASMA DEODORIZING/PLASMA
AIR PURIFYING power cannot be turned
OFF.
POWER lamp
Check point
Abnormal point
(Failure mode)
Detection method
Abnormal electric
discharge error 2
w
As soon as an error is detected, PLASMA DEODORIZING power or PLASMA AIR PURIFYING power goes OFF,
therefore measuring instrument which records the voltage wave is required in order to perform the above men-
tioned voltage measurement.
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