Understanding E4 Error in Casper Air Conditioners: Causes and Solutions

E4 Error in Casper air conditioners can cause the unit to stop functioning, affecting user usage needs. Additionally, if not repaired promptly, it may damage internal components. So, why does Casper air conditioner encounter E4 error and how to fix it? Let's find out!

1. What is E4 Error in Casper air conditioners?

E4 Error is a common issue in Casper air conditioners, occurring when the evaporator fan encounters a problem. When E4 error occurs, the air conditioner operates for about 30 seconds to 2 minutes before shutting off automatically. Additionally, the E4 error message will be displayed on the screen.

2. Causes of E4 Error in Casper air conditioner

E4 Error on Casper air conditioner may originate from a faulty fan motor, causing the controller of the air conditioner on the circuit board to not receive the signal from the fan motor running in the processor, causing the fan to stop working. In some cases, the indoor unit fan still operates normally but sends incorrect signals to the circuit board, resulting in the appearance of E4 Error and the air conditioner automatically stopping for a short period of time.

Another cause of E4 Error in Casper air conditioner is a malfunctioning or damaged outdoor unit sensor. For Casper ceiling-mounted air conditioners, a malfunctioning outdoor unit sensor causing E4 Error is due to pump and drainage system malfunctions, causing the unit to be unable to operate properly.

Furthermore, the E4 error condition on Casper air conditioner may result from:

- Fan damage, requiring replacement.
- Fan wire breakage.
- Malfunction of the internal fan controller.

3. Summarizing 3 quick remedies for E4 error on Casper air conditioner

Below are 3 simple ways to troubleshoot E4 error on Casper air conditioner, depending on specific causes:

3.1 Troubleshooting E4 error on Casper air conditioner caused by the indoor fan

The indoor fan is where you should start checking when the machine indicates E4 error. To observe the indoor fan, remove the plastic cover on the indoor unit and begin investigating the cause. There are 2 scenarios:

- Case where the indoor fan does not run

To check why the indoor fan is not operating, you perform the following steps sequentially:

- Step 1: Check the condition of the 3 wires of the fan at the large plug to see if they are broken. If so, you just need to reconnect each wire according to color and the fan will operate normally.
- Step 2: Use a multimeter to check the capacitor and replace it with a new one of the correct value.
- Step 3: Continue to use the multimeter to check the 2 3-pin plugs. After measuring from one pin to the other, if the resistance does not increase, the fan is faulty and needs to be replaced with a new one of the same model.

- Case where the indoor fan continues to run

If after visual observation, the indoor fan is still operating properly, the E4 error on Casper air conditioner may stem from a faulty signal circuit board within the circuit board from the fan to the processor. At this point, you cannot repair it yourself at home but need to contact the warranty center or a technical specialist for troubleshooting.

3.2 Troubleshooting E4 error caused by outdoor sensor.

When inspecting sensor systems, if misalignment is detected, simply readjusting to the original position can resolve the E4 error. Also, ensure the circuit board is properly connected. If the board is correctly placed and the connections are normal, the sensor may be damaged and require replacement.

3.3 Troubleshooting E4 error in Casper air conditioners due to water pump failure.

To perform this method, first, you need to clean the condensate pump thoroughly. Next, check if the condensate pump has any broken wires or is touching the casing. If the pump has broken wires or the casing is damaged, you need to replace the pump or install new wiring.

Above are some reference methods for quickly addressing the E4 error display when using Casper air conditioner. However, when this error occurs, it is best to contact a repair center for technicians to conduct a more accurate diagnosis. Additionally, to minimize errors during usage, when purchasing an air conditioner, you should only buy from reputable sources to ensure quality.

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Hopefully through this article, you have understood the causes of the E4 error in Casper air conditioners and how to effectively troubleshoot it. Wishing you successful implementation!

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