138
16.4.29 F99 (Output Over Current Detection)
Malfunction Decision Conditions
During operation of cooling and heating, when an output over-current (DC peak current value at IPM Prevention
Control) is detected by checking the current that flows in the inverter DC peak sensing circuitry.
Malfunction Caused
Faulty outdoor unit PCB
Faulty
compressor
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
∞
Summary of Contents for CS-E12NKR
Page 30: ...30 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control ...
Page 31: ...31 5 Dimensions 5 1 Indoor Unit 5 1 1 CS E7NKR CS E9NKR CS E12NKR CS E15NKR ...
Page 32: ...32 5 1 2 CS E18NKR CS E21NKR CS E24NKR CS E28NKR ...
Page 34: ...34 5 2 3 CU E28NKR ...
Page 35: ...35 6 Refrigeration Cycle Diagram 6 1 CU E7NKR ...
Page 36: ...36 6 2 CU E9NKR CU E12NKR ...
Page 37: ...37 6 3 CU E15NKR CU E18NKR ...
Page 38: ...38 6 4 CU E21NKR ...
Page 39: ...39 6 5 CU E24NKR CU E28NKR ...
Page 40: ...40 7 Block Diagram 7 1 CU E7NKR CU E9NKR CU E12NKR ...
Page 41: ...41 7 2 CU E15NKR CU E18NKR CU E21NKR ...
Page 42: ...42 7 3 CU E24NKR ...
Page 43: ...43 7 4 CU E28NKR ...
Page 44: ...44 8 Wiring Connection Diagram 8 1 Indoor Unit ...
Page 45: ...45 8 2 Outdoor Unit 8 2 1 CU E7NKR CU E9NKR CU E12NKR ...
Page 46: ...46 8 2 2 CU E15NKR CU E18NKR ...
Page 47: ...47 8 2 3 CU E21NKR ...
Page 48: ...48 8 2 4 CU E24NKR ...
Page 49: ...49 8 2 5 CU E28NKR ...
Page 50: ...50 9 Electronic Circuit Diagram 9 1 Indoor Unit ...
Page 51: ...51 9 2 Outdoor Unit 9 2 1 CU E7NKR CU E9NKR CU E12NKR ...
Page 52: ...52 9 2 2 CU E15NKR CU E18NKR ...
Page 53: ...53 9 2 3 CU E21NKR ...
Page 54: ...54 9 2 4 CU E24NKR ...
Page 55: ...55 9 2 5 CU E28NKR ...
Page 58: ...58 10 1 6 Human Activity Sensor Printed Circuit Board ...
Page 59: ...59 10 2 Outdoor Unit 10 2 1 CU E7NKR CU E9NKR CU E12NKR ...
Page 60: ...60 10 2 2 CU E15NKR CU E18NKR ...
Page 61: ...61 10 2 3 CU E21NKR CU E24NKR ...
Page 62: ...62 10 2 4 CU E28NKR ...
Page 63: ...63 10 2 5 Noise Filter Printed Board CU E21NKR ...
Page 108: ...108 16 3 Error Code Table ...
Page 109: ...109 ...
Page 140: ...140 17 1 1 3 To remove discharge grille ...
Page 141: ...141 17 1 1 4 To remove control board 17 1 1 5 To remove cross flow fan and indoor fan motor ...
Page 142: ...142 ...
Page 144: ...144 17 2 1 3 To remove power electronic controller ...
Page 146: ...146 ...
Page 201: ...201 19 2 5 CU E28NKR ...
Page 202: ...202 ...