Toshiba MMK-AP0073HP1-E1 Service Manual page 122

Check code
[H08] / [d4]
(Current code / AI-NET)
Sub-code: 01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error
The detected error is an oil level detective temperature sensor error.
Check disconnection of the wiring and resistance value of the sensor.
If the sensors are normal, replace the outdoor I/F P .C. board.
Check code
[H16] / [d7]
(Current code / AI-NET)
Is not TK1 sensor detached?
NO
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
Are characteristics of TK1 sensor
resistance value normal?
YES
Start a test operation in COOL or HEAT mode.
TK1 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [11] [2].
Check TK1 sensor temp approx. 10 minutes after compressor 1 has operated.
If low temperature continues (approximately outside temp) or temperature
does not almost change, a clogging of strainer of oil-equalization circuit,
clogging of capillary tube, or malfunction of check valve is considered.
No error
Check the clogging of SV3E valve.
(Note 1)
No error
Check I/F P.C. board
Check code name
Oil level detective
temperature sensor error
Check code name
TK1 temperature
detective circuit error
(Sub-code: 01)
YES
YES
* Characteristics-4
NO
* Outdoor unit temp sensor characteristics-4
Error
(Note 1) Refer to item [H07] error.
Cause of operation
TK1 to TK4 sensor Open/Short
Cause of operation
1. Coming-off of TK1 sensor, miscabling,
characteristics error of resistance value
2. Oil-equalization circuit error
(Check valve, capillary clogging, strainer clogging)
3. Refrigerant stagnation in case of compressor shell
Error
Replace SV3E valve.
122
FILE NO. SVM-16046
Circuit Connector
TK1 CN514 (Black)
TK2 CN515 (Green)
TK3 CN516 (Red)
TK4 CN523 (Yellow)
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
( )
TK2: CN515
TK3: CN516
TK4: CN523
Sensor error
Replace clogged part.
Compressor 1
Strainer
Capillary tube
TK1
Oil tank