84
14.4.21 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-PS9NKH
Страница 13: ...13 3 Location of Controls and Components 3 1 Indoor Unit 3 2 Outdoor Unit 3 3 Remote Control...
Страница 14: ...14 4 Dimensions 4 1 Indoor Unit 4 1 1 CS PS9NKH CS PS12NKH CS PS18NKH...
Страница 15: ...15 4 1 2 CS PS24NKH...
Страница 16: ...16 4 2 Outdoor Unit 4 2 1 CU PS9NKH CU PS12NKH 4 2 2 CU PS18NKH...
Страница 17: ...17 4 2 3 CU PS24NKH...
Страница 18: ...18 5 Refrigeration Cycle Diagram 5 1 CS PS9NKH CU PS9NKH CS PS12NKH CU PS12NKH...
Страница 19: ...19 5 2 CS PS18NKH CU PS18NKH CS PS24NKH CU PS24NKH...
Страница 20: ...20 6 Block Diagram 6 1 CS PS9NKH CU PS9NKH...
Страница 21: ...21 6 2 CS PS12NKH CU PS12NKH...
Страница 22: ...22 6 3 CS PS18NKH CU PS18NKH...
Страница 23: ...23 6 4 CS PS24NKH CU PS24NKH...
Страница 24: ...24 7 Wiring Connection Diagram 7 1 Indoor Unit 7 1 1 CS PS9NKH CS PS18NKH CS PS24NKH...
Страница 25: ...25 7 1 2 CS PS12NKH...
Страница 30: ...30 8 Electronic Circuit Diagram 8 1 Indoor Unit 8 1 1 CS PS9NKH CS PS18NKH CS PS24NKH...
Страница 31: ...31 8 1 2 CS PS12NKH...
Страница 32: ...32 8 2 Outdoor Unit 8 2 1 CU PS9NKH...
Страница 33: ...33 8 2 2 CU PS12NKH...
Страница 34: ...34 8 2 3 CU PS18NKH...
Страница 35: ...35 8 2 4 CU PS24NKH...
Страница 37: ...37 9 1 1 2 CS PS12NKH 9 1 2 Indicator Printed Circuit Board...
Страница 38: ...38 9 2 Outdoor Unit 9 2 1 Main Printed Circuit Board 9 2 1 1 CU PS9 12NKH...
Страница 39: ...39 9 2 1 2 CU PS18NKH...
Страница 40: ...40 9 2 1 3 CU PS24NKH...
Страница 41: ...41 9 2 2 Noise Filter Printed Circuit Board 9 2 2 1 CU PS9NKH CU PS12NKH...
Страница 47: ...47 10 2 5 Wire Stripping And Connecting Requirement...
Страница 90: ...90 15 2 3 To remove power electronic controller Figure 13 Figure 14 15 2 4 To remove discharge grille Figure 15...
Страница 92: ...92 Figure 19 Figure 20...