It is essential to understand possible errors your Hisense air conditioner may display. These errors are diverse and varying depending on the exact issue. Understanding what these are makes it easy to troubleshoot and fix.
The good news is that most of the air conditioner error codes are easy to fix. You don’t have to master any complicated procedures. However, it all starts with establishing the errors and understanding how to fix them. I will help you figure out most, if not all, of the error codes in Hisense ACs below. Next time any of these errors are displayed on your AC, you can know exactly how to fix them.
Common Hisense AC Error Codes
| Possible Error code | Potential causes |
|---|---|
| E2 | 1. Usually, this is meant for protection. This means that its outdoor fan motor may also stop running when the indoor pipe temperature gets anywhere from 53℃ <T<63℃. The error code will display when the indoor coil temperature increases beyond 63℃. The air conditioner will restart after the indoor pipe temperature exceeds 49℃.
2. The indoor coil temperature sensor is loose. 3. The indoor coil temperature sensor is a failure. 3. The indoor control board is a failure. |
| E4 | 1. There is a possibility that something could be blocking the indoor fan motor.
2. Your AC’s fan motor cord connection may be loose. 3. The fan motor may have failed. 4. The indoor control board is a failure. |
| EA | 1. The connection between the display board and the control board may be loose.
2. It is also possible that the indoor control board has also failed. 3. The wiring of the display board is a failure. |
| 1 | 1. The outdoor temperature sensor may be loose.
2. The outdoor temperature sensor may have failed. 3. The indoor control board may also have failed, so it must be fixed. |
| 2. | Your outdoor coil temperature sensor may have short-circuited, or there could be an open circuit. You need to find the source of the short circuit and have it fixed in good time. |
| 3 | This indicates the current protective device. |
| 4 | EEprom Data error or EE chip fault. |
| 5. | The refrigeration indoor coil temperature may be too low, or the heating of the indoor coil temperature is too high. |
| 6. | The AC motor may be at fault. In case the motor is problematic, then this is the error that will be displayed. |
| 7 | The outdoor works continuously for 2 minutes without receiving indoor communication data. |
| 8 | This indicates a phase current imbalance. |
| 9 | It indicates a current U phase. |
| 10 | Indicates a current V phase. |
| 11 | Signifies the three-phase power supply wiring line sequence error. |
| 12 | This is the detection phase. You will notice something is off when this error is displayed. |
| 13 | Shows the compressor overheating protector is tripping. |
| 14 | Indicates that too high system pressure leads to high-pressure switch tripping or pressure sensors to detect too high to achieve shutdown protection pressure. |
| 15 | It shows that the system’s low pressure causes low-pressure switch tripping or sensors to detect too low to achieve the shutdown protection pressure. |
| 16. | This shows that the outdoor coil temperature is too high to get to refrigeration
temperature shutdown protection. |
| 17 | The exhaust temperature sensor may have short-circuited, or it may have an open circuit. |
| 18 | The power input AC voltage may be too low or too high. |
| 19 | The exhaust temperature sensor may have a short circuit or open circuit. |
| 20 | 1. The motor cord connection may be loose.
2. The motor may be invalid. 3. The outdoor fan may be blocked. 4. The outdoor control board is invalid. |
| 21 | The outlet of the condenser temperature sensor may have a short circuit or
open circuit. |
| 22 | The outlet of the condenser temperature sensor may be a short circuit or
open circuit. |
| 23 | The expansion valve A tube sensor may have a short or open circuit. |
| 24 | The expansion valve B tube sensor has a short or open circuit. |
| 25 | The expansion valve C tube sensor has a short or open circuit. |
| 26 | The expansion valve D tube sensor has a short or open circuit. |
| 27 | 1. The pressure switch may be working.
2. The pressure switch may be invalid. 3. The outdoor control board may be invalid. |
| 28 | Expansion valve B thick pipe sensor short circuit or open circuit. |
| 29 | Expansion valve C thick pipe sensor short circuit or open circuit. |
| 30 | Expansion valve D thick pipe sensor short circuit or open circuit. |
| 33 | 1. The indoor room temperature sensor may be loose.
2. The indoor room temperature sensor may be faulty. 3. The indoor control board is faulty. |
| 34 | 1. The indoor coil temperature sensor may be loose.
2. The indoor coil temperature sensor may be faulty 3. The indoor control board has failed. |
| 36 | 1. The interconnection cord may be loose.
2. The interconnection cord may not be in proper order. 3. The indoor control board may be invalid. 4. The outdoor control board may be invalid. |
| 38 | 1. The EEPROM chip may be loose.
2. The indoor control board may have failed. |
| 39 | 1. Something is blocking the indoor fan motor.
2. The fan motor cord connect may be loose. 3. The fan motor may have failed. 4. The indoor control board may have failed. |
| 41 | The indoor control board may have failed. |
| 42 | 1. It is normally used for protection, especially when the indoor pipe temperature falls below T<-1℃(-7℃). The outdoor fan motor and compressor will stop running. When the Indoor pipe temperature exceeds -1(-7℃), the unit will restart normally.
2. The indoor coil temperature sensor is loose. 3. The indoor coil temperature sensor may have failed. The indoor control board is a failure. |
| 43 |
|
| 44 | The L Pressure sensor is at fault. |
| 45 | IPM fault. |
| 46 | There is an IPM Communication fault. |
| 47 | The exhaust temperature is too high to reach shutdown temperature. |
| 48 | Outdoor DC fan fault. Make sure the outdoor fan is always in good working condition. Check that the fan is not damaged. |
| 49 | Outdoor DC fan fault. |
| 90 | Forced expansion valve. |
| 91 | IPM temperature is too high to reach shutdown temperature. |
| 92 | Compression ratio is too large to stop. |
| 97 | Four-way valve commutation may have failed. |
Understanding the codes matters more since you can easily detect the issue and find a solution. I will explore some of the error codes’ meanings and solutions.
Error Code E2
This error code appears when temperatures exceed 63 C. You can consider it a protective code since it serves as a warning. It occurs when temperatures get from 53C<T<63C and the outdoor fan motor stops running. You can fix the indoor coil temperature each time the code displays.
Once the indoor pipe temperature is low enough, past 49 C, then your AC can start working. This solution fixes errors such as loose indoor coil temperature sensors, faulty indoor coil temperature sensors, and faulty control boards, all triggering the Code E2 error.
Error Code E4
This happens when the indoor fan speed goes below 200rpm. The error code displays when this temperature is exceeded. Usually, the root cause varies and includes a blockage when the indoor fan motor is blocked. It could also happen when the fan motor cord connect is loose, and the fan motor may fail. It could also happen when the indoor control board fails.
Error Code EA
Usually, this code displays when the control board and display board can no longer communicate with each other. This often occurs because the connection between the control and display boards is loose. It can also happen when the indoor control board fails. The same error comes when the display board fails due to a wiring issue.
Fortunately, most of these codes are easy to fix. They need a bit of understanding, and you can then easily fix them. Usually, it all needs you to reset what could be off. Only then can you know for sure what problem it is your AC is facing. Always examine the error code first and interpret it accordingly before you can find the right solution.
