Indicates that the temperature sensing head is short-circuited. At this time the compressor enters the timing working mode, it runs for 30 minutes and then stops for 30 minutes

Solution: Replace the temperature probe

Indicates that the temperature sensing head is short-circuited. At this time the compressor enters the timing working mode, it runs for 30 minutes and then stops for 30 minutes

Solution: Replace the temperature probe

Indicates that the module input undervoltage protection

Solution: When adapter power is being using, please replace the adapter  When the car power supply is being using, please adjust the voltage protection switch to mid-range or low-range.

If the voltage protection switch still displays a fault code, it means that the battery voltage of the car is also seriously insufficient, and the battery needs to be charged or replaced

Indicates that the module input undervoltage protection

Solution: When adapter power is being using, please replace the adapter  When the car power supply is being using, please adjust the voltage protection switch to mid-range or low-range.

If the voltage protection switch still displays a fault code, it means that the battery voltage of the car is also seriously insufficient, and the battery needs to be charged or replaced

Indicates DC fan overcurrent protection

Solution: 1. Replace the DC fan                  

2. If ER2 is still displayed after replacing the fan, then replace the compressor module

Indicates DC fan overcurrent protection

Solution: 1. Replace the DC fan                  

2. If ER2 is still displayed after replacing the fan, then replace the compressor module

Indicates abnormal compressor startup protection

Solution: 1. Check whether the external power supply (car power supply/adapter) is normal                  

2. Check whether the DC fan is running at the beginning of operation, if not, replace the fan                  

3. If the fan is running, replace the compressor

Indicates abnormal compressor startup protection

Solution: 1. Check whether the external power supply (car power supply/adapter) is normal                  

2. Check whether the DC fan is running at the beginning of operation, if not, replace the fan                  

3. If the fan is running, replace the compressor

Indicates abnormal compressor speed protection

Solution: 1. Check whether the external power supply (car power supply/adapter) is normal                  

               2. Check whether the DC fan is running at the beginning of operation, if not, replace the fan                 

               3. If the fan is running, replace the compressor

Indicates abnormal compressor speed protection

Solution: 1. Check whether the external power supply (car power supply/adapter) is normal                  

               2. Check whether the DC fan is running at the beginning of operation, if not, replace the fan                 

               3. If the fan is running, replace the compressor

Indicates module temperature abnormal protection

Solution: replace the compressor module first. If it is still faulty, you need to replace the compressor

Indicates module temperature abnormal protection

Solution: replace the compressor module first. If it is still faulty, you need to replace the compressor

Indicates that the temperature sensing head is open. At this time the compressor enters the timing working mode, it runs for 30 minutes and then stops for 30 minutes

Solution: Check whether the connection of the temperature probe terminal is loose. If it is loose, then reconnect the connector. If the connection is normal, you need to replace the temperature probe

Indicates that the temperature sensing head is open. At this time the compressor enters the timing working mode, it runs for 30 minutes and then stops for 30 minutes

Solution: Check whether the connection of the temperature probe terminal is loose. If it is loose, then reconnect the connector. If the connection is normal, you need to replace the temperature probe