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| For remote |
| Failure code |
| For central |
| Failure description |
| Reason |
| Remarks | Error | |
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| type, flash |
| on wired |
| control, |
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| times |
| controller |
| failure code |
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| display |
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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/Compressor |
| Sensor broken down or short circuit for more than 2m continuously |
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| discharging temp. sensor abnormal |
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5 |
| 72(48H) |
| 10D |
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| CT check abnormal 3 times in 30m / Fault phase, short of phase, |
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| abnormal |
| out of balance greatly |
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| 6 |
| 83(53H) |
| 14D |
| High/Low pressure abnormal |
| High pressure switch acts 3 times in 30m/Low pressure switch acts |
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| in normal running |
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| series |
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8 |
| 07(07H) |
| 06D |
| Communication between wired |
| Communication abnormal for more than 4m continuously |
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| controller and indoor abnormal |
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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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| 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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| 15 |
| 05(05H) |
| 17D |
| EEPROM abnormal |
| EEPROM data missing |
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17 |
| 80(50H) |
| 15D |
| Compressor overheat |
| The discharging temperature is higher than 120degree |
| Resumable if |
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| lower than |
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| 100 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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shows resumable fault, 
shows it is not resumable fault.