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| Error |
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| For remote | Failure code | For central | Failure description | Reason | Remarks |
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| type, flash | on wired | control, |
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| times | controller | failure code |
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| 1 | 01(01H) | 01D | Indoor ambient temp. sensor failure | Sensor broken down or short circuit for more than 2m continuously |
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| 2 | 02(02H) | 02D | Indoor coil temp. sensor failure | Sensor broken down or short circuit for more than 2m continuously |
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| 3 | 74(4AH) | 11D | Outdoor ambient temp. sensor failure | Sensor broken down or short circuit for more than 2m continuously |
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| 4 | 73(49H) | 12D | Outdoor coil temp. sensor failure | Sensor broken down or short circuit for more than 2m continuously |
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| 5 | 72(48H) | 10D | CT check abnormal 3 times in 30m |
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| 6 | 83(53H) | 14D | High pressure abnormal | High pressure switch acts 3 times in 30m |
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| 7 | 71(47H) | 22D | Power supply abnormal | Fault phase, short of phase, out of balance greatly |
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| 8 | 07(07H) | 06D | Communication between wired |
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| controller and indoor abnormal | Communication abnormal for more than 4m continuously |
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| 9 | 06(06H) | 05D | Communication between indoor and outdoor abnormal | Communication abnormal for more than 4m continuously |
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| 10 | 08(08H) | 21D | Drainage system abnormal | Float switch broken down for more than 25m continuously |
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| 11 | 11(0BH) | 30D | Outside alarm signal input | Outside signal broken down for more than 10s |
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20 | 12 | 03(03H) | 20D | Gas pipe temp. sensor abnormal | Sensor broken down or short circuit for more than 2m continuously |
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| 13 | 13(0DH) | 31D | Temperature protection malfunction | Solenoid valve act incorrectly 3 times continuously |
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| 14 | 76(4CH) | 15D | Discharging temp. sensor abnormal | Sensor broken down or short circuit for more than 2m continuously |
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| 15 | 05(05H) | 17D | EEPROM abnormal | EEPROM data missing |
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| 16 | 84(54H) | 26D | Pressure abnormal(low pressure) | Low pressure switch acts in normal running | Resumable if |
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| 17 | 80(50H) | 15D | Compressor overheat | The discharging temperature is higher than 120degree |
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| lower than 100 |
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| degree |
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| 18 | 12(0CH) | 23D | Abnormal mode | Indoor operation mode is different with the running indoor unit. |
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| 19 | 75(4BH) | 18D | Outdoor coil B(suction temp | Sensor broken down or short circuit for more than 2m continuously |
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| 20 | 77(4DH) | 15D | Outdoor discharging B(oil temp | Sensor broken down or short circuit for more than 2m continuously |
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| 21 | 20(32D) | 07D | SPDU module temperature protection | Spdu module temperature is too high |
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shows resumable fault, 
shows it is not resumable fault.