Toshiba SUPER MMK-AP0073H (IN) Service Manual page 104

Check code
[H16] / [d7]
(Current code / AI-NET)
Is not TK3 sensor come off?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK3 sensor
resistance value normal?
YES
After power reset,
check capillary choke of SV3C valve bypass.
Start a test operation in COOL or HEAT mode.
TK3 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [13] [2].
Check TK3 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of parallel capillary is considered.
No error
Check the clogging of SV3E valve.
(Note 1)
No error
Check I/F P.C. board
Check code name
TK3 temperature
detective circuit error
(Sub-code: 03)
YES
YES
NO
* Outdoor unit temp sensor characteristics-4
Error
(Note 1) Refer to item [H07] error.
104
Cause of operation
1. Detachment of TK3 sensor, miscabling,
characteristics error of resistance value
2. Error of SV3C valve circuit periphery
(Check capillary clogging, strainer clogging)
3. Refrigerant stagnation in compressor shell
Correct installation of sensor.
Correct miscabling/misinstallation.
Sensor error → Replace
Error
Replace clogged part (Capillary).
Strainer
SV3E valve
TK3
Replace SV3E valve.
TK1: CN514
( )
TK2: CN515
TK3: CN516
TK4: CN523