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Circuit
TK1
TK2
TK3
TK4
TK5
Connector
CN531 (Black)
CN532 (Green)
CN533 (Pink)
CN534 (Yellow)
CN535 (Red)
[H08]
No
Yes
Yes
No error
No
No error
Error
Error
No
Yes
[H16]
Check code CauseCheck code name
Check code CauseCheck code name
Oil level detective temperature
sensor error
TK1 to TK5 sensor Open/Short
Oil level detection circuit error
TK1 temperature detective circuit
error (Sub-code: 01)
Sub-code:
01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error
04: TK4 sensor error 05: TK5 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.
1. Coming-off of TK1 sensor, miswiring,
characteristics error of resistance value
2. Oil-equalization circuit error (Check valve,
capillary clogging, strainer clogging)
3. Refrigerant stagnation in the compressor shell
Is not TK1 sensor
detached?
Is there
no miswiring or
misinstallation on
TD1/TD2/TD3/TK1/TK2/
TK3/TK4/TK5
sensors?
Are
characteristics of
TK1 sensor resistance
value normal?
Check the
clogging of SV3E
valve. (Note 1)
Correct installation of sensor.
Sensor error
Replace clogging part.
Replace SV3E valve.
Check I/F P.C. board
Correct miswiring/misinstallation.
TD1: CN502 white TD2: CN503 pink
TD3: CN504 blue
TK1: CN531, black TK2: CN532, green
TK3: CN533, pink TK4: CN534, yellow
TK5: CN535, red
Start a test operation in COOL or HEAT mode.
Display TK1 sensor temperature on 7-segment display with
SW01/02/03=[1] [12] [2].
Check TK1 sensor temp approx. 10 minutes after compressor 1 has operated.
If low temperature continues (approximately outside temp) or temperature has
little change, a clogging of strainer of oil-equalization circuit, clogging of
capillary tube, or malfunction of check valve is considered.
(Note 1) Refer to the article of the check code [H07].
*See "Outdoor unit temperature sensor
characteristics" on "9-9. Sensor Characteristics".
↓
↓
Comp. 1
(inverter)
Strainer
Check
valve
Capillary
tube
(TK1)
Error
No
Ye s
Ye s
Ye s
No
No
No error
No error
Error
[H16]
Check code CauseCheck code name
Oil level detection circuit error
TK2 temperature detective circuit
error (Sub-code: 02)
1. Coming-off of TK2 sensor, miswiring,
characteristics error of resistance value
2. Oil-equalization circuit error (Check valve,
capillary clogging, strainer clogging)
3. Refrigerant stagnation in the compressor shell
Is not TK2 sensor
detached?
Is there
no miswiring or
misinstallation on
TD1/TD2/TD3/TK1/TK2/
TK3/TK4/TK5
sensors?
Are
characteristics of TK2
sensor resistance
value normal?
Check the clogging
of SV3E valve.
(Note 1)
Correct installation of
sensor.
Sensor error
Replace clogging part.
Replace SV3E valve.
Check I/F P.C. board
Correct miswiring/misinstallation.
TD1: CN502, white
TD2: CN503, pink
TD3: CN504, blue
TK1: CN531, black
TK2: CN532, green
TK3: CN533, pink
TK4: CN534, yellow
TK5: CN535, red
Start a test operation in COOL or HEAT mode.
Display TK2 sensor temperature on 7-segment display with
SW01/02/03=[1] [13] [2].
Check TK2 sensor temp approx. 10 minutes after compressor 2 has operated.
If low temperature continues (approximately outside temp) or temperature has
little change, a clogging of strainer of oil-equalization circuit, clogging of
capillary tube, or malfunction of check valve is considered.
(Note 1) Refer to the article of the check code [H07].
After resetting
the power
*See "Outdoor unit temperature sensor
characteristics" on "9-9. Sensor Characteristics".
↓
↓
(TK2)
Capillary
tube
Strainer
Comp. 2
(inverter)
Check
valve
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