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Check code Check code name<br />
Cause<br />
[H16] / [d7]<br />
(AI-NET)<br />
TK4 temperature detective circuit<br />
error<br />
(Sub-code: 04)<br />
1. Coming-off of TK4 sensor, miswiring, characteristics<br />
error of resistance value<br />
2. Malfunction of SV3E valve circuit (Check valve,<br />
capillary clogging, strainer clogging)<br />
3. Refrigerant stagnation in the compressor shell<br />
Is not TK4 sensor<br />
detached?<br />
Yes<br />
Correct installation of sensor.<br />
No<br />
Is there<br />
no miswiring or<br />
misinstallation on<br />
TK1/TK2/TK3/TK4/TK5<br />
sensors?<br />
No<br />
Yes<br />
Correct miswiring/misinstallation.<br />
TK1: CN531, black<br />
TK2: CN532, green<br />
TK3: CN533, pink<br />
TK4: CN534, yellow<br />
TK5: CN535, red<br />
Are<br />
characteristics of<br />
TK4 sensor resistance<br />
value normal?<br />
After resetting<br />
the power<br />
Yes<br />
Check the clogging of SV3E valve.<br />
Start a test operation in COOL or HEAT mode.<br />
Display TK4 sensor temperature on 7-segment display with<br />
SW01/02/03=[1] [15] [2].<br />
No<br />
*See “Outdoor unit temperature sensor<br />
characteristics” on “8-9. Sensor Characteristics”.<br />
Check TK4 sensor temp approx. 10 minutes after compressor 1 has operated.<br />
If low temperature continues (approximately outside temp) or temperature has<br />
little change, clogging of the parallel capillary tube is considered.<br />
↓<br />
↓<br />
Error<br />
Strainer<br />
Sensor error ➝ replace<br />
Replace clogging part (capillary).<br />
SV3C valve<br />
No error<br />
TK4<br />
Check the clogging<br />
of SV3E valve.<br />
(Note 1)<br />
Error<br />
(Note 1) Refer to the article of the check code [H07].<br />
Replace SV3E valve.<br />
No error<br />
Check I/F P.C. board<br />
Check code Check code name<br />
Cause<br />
[H16] / [d7]<br />
(AI-NET)<br />
Oil level detection circuit error<br />
TK3 temperature detective circuit<br />
error<br />
(Sub-code: 03)<br />
1. Coming-off of TK3 sensor, miswiring, characteristics<br />
error of resistance value<br />
2. Oil-equalization circuit error (Check valve, capillary<br />
clogging, strainer clogging)<br />
3. Refrigerant stagnation in the compressor shell<br />
Is not TK3 sensor<br />
detached?<br />
Yes<br />
Correct installation of sensor.<br />
No<br />
Is there<br />
no miswiring or<br />
misinstallation on<br />
TK1/TK2/TK3/TK4/TK5<br />
sensors?<br />
No<br />
Yes<br />
Correct miswiring/misinstallation.<br />
TK1: CN531, black<br />
TK2: CN532, green<br />
TK3: CN533, pink<br />
TK4: CN534, yellow<br />
TK5: CN535, red<br />
After resetting<br />
the power<br />
Are<br />
characteristics of<br />
TK3 sensor resistance<br />
value normal?<br />
Yes<br />
Start a test operation in COOL or HEAT mode.<br />
↓<br />
Display TK3 sensor temperature on 7-segment display with<br />
SW01/02/03=[1] [14] [2].<br />
No<br />
*See “Outdoor unit temperature sensor<br />
characteristics” on “8-9. Sensor Characteristics”.<br />
↓<br />
Check TK3 sensor temp approx. 10 minutes after compressor 1 has operated.<br />
If low temperature continues (approximately outside temp) or temperature has<br />
little change, a clogging of strainer of oil-equalization circuit, clogging of<br />
capillary tube, or malfunction of check valve is considered.<br />
Error<br />
Strainer<br />
Capillary<br />
Compressor<br />
Sensor error<br />
Replace clogging part.<br />
No error<br />
TK3<br />
Check the clogging<br />
of SV3E valve.<br />
(Note 1)<br />
Error<br />
(Note 1) Refer to the article of the check code [H07].<br />
Replace SV3E valve.<br />
No error<br />
Check I/F P.C. board<br />
3<br />
211
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