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113
15.4.25 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-S12MKQ
Страница 11: ...11 3 Location of Controls and Components 3 1 Indoor Unit 3 2 Outdoor Unit 3 3 Remote Control ...
Страница 15: ...15 4 2 3 CU S18MKQ CU S24MKQ ...
Страница 16: ...16 4 2 4 CU S28MKQ ...
Страница 17: ...17 5 Refrigeration Cycle Diagram 5 1 CS S9MKQ CU S9MKQ CS S12MKQ CU S12MKQ ...
Страница 18: ...18 5 2 CS S18MKQ CU S18MKQ CS S24MKQ CU S24MKQ CS S28MKQ CU S28MKQ ...
Страница 19: ...19 6 Block Diagram 6 1 CS S9MKQ CU S9MKQ ...
Страница 20: ...20 6 2 CS S12MKQ CU S12MKQ ...
Страница 21: ...21 6 3 CS S18MKQ CU S18MKQ CS S24MKQ CU S24MKQ ...
Страница 22: ...22 6 4 CS S28MKQ CU S28MKQ ...
Страница 33: ...33 8 2 Outdoor Unit 8 2 1 CU S9MKQ ...
Страница 37: ...37 9 Printed Circuit Board 9 1 Indoor Unit 9 1 1 Main Printed Circuit Board ...
Страница 38: ...38 9 1 2 Power Printed Circuit Board 9 1 2 1 CS S9MK CS S12MK 9 1 2 2 CS S18MK CS S24MK ...
Страница 40: ...40 9 1 6 Comparator Printed Circuit Board 9 1 7 Human Activity Sensor Printed Circuit Board ...
Страница 41: ...41 9 2 Outdoor Unit 9 2 1 Main Printed Circuit Board 9 2 1 1 CU S9MK ...
Страница 42: ...42 9 2 1 2 CU S12MK ...
Страница 43: ...43 9 2 1 3 CU S18MK CU S24MK ...
Страница 44: ...44 9 2 1 4 CU S28MK ...
Страница 45: ...45 9 2 2 Noise Filter Printed Circuit Board 9 2 2 1 CU S9MKQ ...
Страница 115: ...115 Figure 3 Figure 4 Figure 5 16 1 1 3 To remove discharge grille Figure 6 ...
Страница 116: ...116 16 1 1 4 To remove control board Figure 7 16 1 1 5 To remove cross flow fan and indoor fan motor Figure 8 Figure 9 ...
Страница 117: ...117 Figure 10 Figure 11 ...
Страница 119: ...119 16 2 1 3 To remove power electronic controller Figure 14 Figure 15 Figure 16 Figure 17 ...
Страница 121: ...121 Figure 21 Figure 22 Figure 23 ...