66
15.4.20 F99 (Output Over Current Detection)
Malfunction Decision Conditions
During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that
flows in the inverter DC peak sensing circuitry.
Malfunction Caused
DC peak due to compressor failure.
DC peak due to defective power transistor(s).
DC peak due to defective outdoor unit PCB.
Troubleshooting
Checking the power transistor
Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using
the tester.
For the UVW, make measurement at the Faston terminal on the board of the relay connector.
Tester’s negative terminal
Power transistor (+)
UVW
Power transistor (-)
UVW
Tester’s positive terminal
UVW
Power transistor (+)
UVW
Power transistor (-)
Normal resistance
Several k
Ω
to several M
Ω
Abnormal resistance
0 or
∞
Содержание CS-E18NKUA
Страница 9: ...9 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control ...
Страница 10: ...10 5 Dimensions 5 1 Indoor Unit ...
Страница 11: ...11 5 2 Outdoor Unit ...
Страница 12: ...12 6 Refrigeration Cycle Diagram ...
Страница 13: ...13 7 Block Diagram ...
Страница 14: ...14 8 Wiring Connection Diagram 8 1 Indoor Unit ...
Страница 15: ...15 8 2 Outdoor Unit ...
Страница 16: ...16 9 Electronic Circuit Diagram 9 1 Indoor Unit ...
Страница 17: ...17 9 2 Outdoor Unit ...
Страница 18: ...18 10 Printed Circuit Board 10 1 Indoor Unit 10 1 1 Main Printed Circuit Board ...
Страница 19: ...19 10 1 2 Power Printed Circuit Board 10 1 3 Indicator and Receiver Printed Circuit Board ...
Страница 20: ...20 10 2 Outdoor Unit 10 2 1 Main Printed Circuit Board ...
Страница 21: ...21 10 2 2 Noise Filter Printed Circuit Board ...
Страница 45: ...45 15 3 Error Code Table ...
Страница 68: ...68 16 1 1 2 To remove discharge grille ...
Страница 69: ...69 16 1 1 3 To remove control board 16 1 1 4 To remove cross flow fan and indoor fan motor ...
Страница 70: ...70 ...