Tk3 Temperature Detective Circuit Error - Toshiba Super MMU-AP0091H Service Manual

Check code name
[H16] / [d7]
(d07 / 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.
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
Error
Strainer
180
Cause of operation
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
( )
TK2: CN515
TK3: CN516
TK4: CN523
Sensor error Replace
Replace clogged part (Capillary).
SV3E valve
TK3
Replace SV3E valve.