Check code name

Check code name

Cause of operation

 

 

 

[F15]

Outdoor temp sensor miscabling 1.

Misinstallation and misconnection of TE1

 

(TE1, TL)

sensor and TL sensor

 

2.

Resistance characteristics error of TE1

 

 

sensor and TL sensor

Check code name

Check code name

Cause of operation

 

 

 

[F23]

Ps sensor error

Output voltage error of Ps sensor

 

 

 

3. Outdoor P.C. board (I/F) error

Is connection of Ps sensor

connector correct?

NO

Correct connection of connector.

Are installed positions of

TE1 sensor and TL sensor correct?

YES

Are connection of TE1 sensor connector

and TL sensor connector normal?

YES

NO

Outdoor I/F P.C. board

TE1 sensor : CN505, Green

TL sensor : CN521, White

NO

Correct installed positions of TE1 sensor and TL sensor.

Correct connection of connectors.

YES

Are output voltage characteristics

of Ps sensor normal?

YES

Connector: CN500, White

NO

Sensor error

1 Pressure (Check joint) by pressure gauge

2Pressure display on 7-segment display

3Output voltage of I/F P.C. board

If 1 and 2, 3 are different, an error of pressure sensor itself is considered. If 2 and 3 are different, check interface P.C. board.

Are resistance characteristics of TL sensor and TE1 sensor normal?

NO

Correct connection of connectors.

Is there no leakage

NO

Is not refrigerant by

NO

Check compressor.

 

passed from discharge to

 

 

from SV4 valve?

 

 

 

 

suction of 4-way valve?

 

 

 

YES

Check outdoor I/F P.C. board.

Defect Replace

Outdoor unit temperature sensor characteristics See TE1 sensor : Characteristics-5.

See TL sensor : Characteristics-3.

 

YES

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace SV4 valve.

 

Check 4-way valve.

 

 

 

 

 

TE1 sensor : Outdoor heat exchanger temp sensor

TL sensor : Temp sensor between liquid tanks of outdoor PMV1/2

72

 

 

 

 

 

 

 

 

 

 

Check code name

Check code name

 

Cause of operation

 

 

 

 

 

 

[F16]

Outdoor pressure sensor miscabling

1.

High-pressure Pd sensor and low-

 

 

(Pd, Ps)

 

pressure sensor Ps are exchanged.

 

 

 

2.

Output voltage of each sensor is zero.

 

 

 

 

 

Check code name

Check code name

Cause of operation

 

 

 

[F24]

Pd sensor error

Output voltage error of Pd sensor

 

 

 

It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501) circuit and output voltage of sensor.

If the sensor is normal, replace outdoor I/F P.C. board.

Are connection of Pd sensor and Ps sensor connectors correct?

YES

Are output voltage characteristics of Pd sensor and Ps sensor normal?

YES

Are Pd/Ps output values Pd > Ps during compressor operation?

YES

Check outdoor I/F P.C. board.

Defect Replace

NO

 

Correct connection of connectors.

 

 

Pd sensor: CN501, Red

 

 

 

Ps sensor: CN500, White

NO

 

 

 

 

 

Sensor error Replace

 

 

 

 

 

 

1 Pressure (Check joint) by pressure gauge

2Pressure display on 7-segment display

3Output voltage of I/F P.C. board

If 1 and 2, 3 are different, an error of pressure sensor itself is considered. If 2 and 3 are different, check interface P.C. board.

NO

Check compressor.

*Value can be confirmed by 7-segment display function on outdoor I/F P.C. board.

Pd SW01/02/03=1/1/2 Ps SW01/02/03=1/2/2

Check code name

Check code name

Cause of operation

[F29]

Indoor other error

Indoor P.C. board error

 

 

EEROM error

This error is detected during operation of air conditioner of IC10 non-volatile memory (EEPROM) on indoor unit P.C. board. Replace service P.C. board.

∗If EEPROM was not inserted when power was turned on or it is absolutely impossible to read/write EEPROM data, the automatic address mode is repeated. In this case, [97 error] is displayed on AI-NET central controller.

(Approx. 3 minutes)

(Approx. 1 minute)

 

 

 

 

 

(Power ON)

 

 

[SET DATA] is displayed

 

[SET DATA]

 

LED (D02) 1Hz flashes

 

Reboot

 

 

 

 

 

 

 

 

on main remote controller.

disappears.

 

for approx. 10 seconds

(Reset)

 

 

 

 

 

 

 

 

 

 

(Repetition)

 

on indoor unit P.C. board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 71 Page 73
Page 72
Image 72
Toshiba MMU-AP0091MH F15 Outdoor temp sensor miscabling, TE1, TL, F23, F16, Pd, Ps, F24, F29 Indoor other error
Page 71 Page 73

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