Stainless steel cold-rolled refrigerator controller displays fault code problem: the controller continuously displays the LL fault code, indicating that the temperature sensing head is open. At this time, the compressor enters the timed working mode, runs for 30 minutes, and then stops for 30 minutes.

   Solution: Check whether the connection of the temperature probe terminals is loose. If loose, reconnect the connector. If the connection is OK, the temperature probe needs to be replaced.

The controller continuously displays the HH fault code, indicating that the temperature sensing head is short-circuited. At this time, the compressor enters the regular working mode and stops for 30 minutes after running for 30 minutes. The solution is to replace the temperature probe.

   The controller continuously displays the ER1 fault code, indicating that the module is input under voltage protection. Solution: When using adapter power, replace the adapter

   In addition, it should be noted that when using the vehicle power supply, please adjust the voltage protection switch to the mid-range or low-range. If the voltage protection switch still displays the fault code, it means that the battery voltage of the car is also seriously insufficient, and the battery needs to be charged or replaced.

   The controller continuously displays the ER2 fault code, indicating the DC fan overcurrent protection

   Solution: 1. Replace the DC fan

2. If RE2 is still displayed after replacing the fan, replace the compressor module

   The controller continuously displays the ER3 fault code, indicating that the compressor starts abnormally protected

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

2. Check whether the DC fan is running when starting to run, if not, replace the fan
3. If the fan is running, replace the compressor

   The controller continuously displays the ER4 fault code, indicating that the compressor speed protection is abnormal

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

2. Check whether the DC fan is running when starting to run, if not, replace the fan
3. If the fan is running, replace the compressor

    The controller continuously displays the ER5 fault code, indicating the module temperature abnormal protection

    Solution: Replace the compressor module first. If it still fails, the compressor needs to be replaced.

    Zhejiang Yunge Electric Co., Ltd. is a China-based car bridge freezer supplier, selling car electronic refrigerators, camping car freezers, and other car refrigerators series all the year-round.