Tk4 Temperature Detective Circuit Error - Toshiba Super MMU-AP0091H Service Manual

Check code name
[H16] / [d7]
(d07 / AI-NET)
Is not TK4 sensor detached?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK4 sensor
resistance value normal?
YES
Does OCR of MG-SW operate?
NO
Check the clogging of SV3E valve.
(*1)
Error
Replace SV3E valve.
Check the clogging of SV3E valve.
Check code name

TK4 temperature detective circuit error

(Sub-code: 04)
YES
YES
NO
YES
No error
*1 Refer to item [H07] error.
*2 If OCR operates even after manual reset of OCR, check whether the wiring to the
current sensor (TO2) of Comp-IPDU is correct or not.
1. Detachment of TK4 sensor, miscabling,
characteristics error of resistance value
2. Check clogging and malfunction of
SV3E valve circuit.
3. Oil-equalization circuit error
(Check capillary clogging, strainer
clogging)
4. Refrigerant stagnation in compressor
shell
181
Cause of operation
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
( )
TK2: CN515
TK3: CN516
TK4: CN523
Sensor error Replace
Reset OCR manually.(*2)
Check I/F P.C. board