Mitsubishi Electric MSZ-SF20VA - E1 Specifications download pdf (Page 14)

WALL-MOUNTED Inverter Heat Pump

M series

TROUBLESHOOTING

WALL-

MOUNTED

C-157

Indoor unit failure mode table

w OPERATION INDICATOR lamp

POWER lamp (

MSZ-FD)

Upper lamp (

MSZ-GE, MSZ-HC)

Left lamp (

MSZ-SF)

NOTE : Blinking patterns of this mode differ from the ones of "Troubleshooting check table".

12-time flash

2.5-second OFF

Indoor control system

It cannot properly read data in the

nonvolatile memory of the indoor electronic

control P.C. board.

11-time flash

2.5-second OFF

Indoor fan motor

The rotational frequency feedback signal is

not emitted for 12 seconds after indoor fan

motor is operated.

2-time flash

2.5-second OFF

Indoor coil thermistor

The indoor coil thermistor short or open

circuit is detected every 8 seconds during

operation.

3-time flash

2.5-second OFF

Serial signal

The serial signal from outdoor unit is

not received for 6 minutes.

1-time flash

every 0.5-second

Room temperature

thermistor

The room temperature thermistor short

or open circuit is detected every 8 seconds

during operation.

Not lighted Normal —

POWER/Upper/Left lamp of

OPERATION INDICATOR lamp

Abnormal point

(Failure mode)

Condition

PLASMA operation failure mode table

5-time flash

The voltage between CN1 (+) and (GND)

on the PLASMA POWER P.C board rises

above the normal voltage value (3 V).

4-time flash

PLASMA DEODORIZING

The voltage between CN1 (+) and (GND)

on the PLASMA POWER P.C.board falls

significantly. (0.4 V / 0.5 ms)

3-time flash

Abnormal electric

discharge error 1

The voltage between CN1 (+) and (GND)

on the PLASMA POWER P.C.board falls by

0.9 V below the normal voltage value (3 V).

2-time flash Spark discharge

1-time flash

PLASMA power supply

control

The voltage between CN1 (+) and (GND)

on the PLASMA POWER P.C.board falls

below 1.6 V(spark discharge judgment

voltage).

PLASMA power supply cannot be turned

OFF even if the PLASMA operation is turned

OFF with the remote controller.

POWER lamp

Abnormal point

(Failure mode)

Condition

Abnormal electric

discharge error 2

NOTE1 : Blinking patterns of this mode differ from the ones of "Troubleshooting check table".

NOTE2 : As soon as an abnormality is detected, PLASMA operation goes OFF, therefore measuring

instrument which records the voltage wave is required in order to perform the above mentioned voltage

measurement.

NOTE3 : When POWER lamp flashes 1-time or 2-time, please perform PLASMA operation check.

MSZ-FD25VA

MSZ-FD25VAS

MSZ-FD35VA

MSZ-FD35VAS

MSZ-FD50VA

MSZ-FD50VAS

MSZ-FD25VA MSZ-GE22VA MSZ-GE60VA MSZ-HC25VA MSZ-SF15VA

MSZ-FD25VAS MSZ-GE25VA MSZ-GE71VA MSZ-HC35VA MSZ-SF20VA

MSZ-FD35VA MSZ-GE35VA MSZ-HC35VAB

MSZ-FD35VAS MSZ-GE42VA

MSZ-FD50VA MSZ-GE50VA

MSZ-FD50VAS

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Mitsubishi Electric MSZ-SF20VA - E1 Specifications Page 14

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