How to recover from the failure of the wall hung boiler E2, and what is the fault of the wall hung b

Take Wanhe wall-hung boiler E2 failure as an example:

Wanhe wall-hung boiler shows the cause and solution of E2.

1. The smoke pipe is too long.

Solution: The smoke pipe of the wall-hung boiler is too long, which will cause the internal exhaust gas to be discharged normally, and the overheating inside the wall-hung boiler will start the overheating protection of the system. Just reduce the length of the pipe.

2. The water tank is blocked.

Solution: The water tank is blocked, the hot water can not flow out normally, and the wall-hung boiler will overheat, there should be too many foreign bodies inside, and the water tank needs to be cleaned at this time.

3. The temperature at the thermocouple is too high.

Solution: If the temperature near the thermocouple is too high, the thermocouple will start the protection device, and the wall-hung boiler fault will be displayed.

4. The thermocouple is damaged.

Solution: If the thermocouple fails, it cannot correctly reflect the temperature of the wall-hung boiler, so the wall-hung boiler will automatically report an error, as long as the thermocouple element is replaced.

5. The water control switch is faulty.

Solution: In addition to the E2 occurrence of the wall-hung boiler because of thermocouple protection, the failure of the water control switch will also lead to the failure of E2, such as the micro switch fork will not be reset, as long as the water control switch is adjusted.

First of all, determine the fault**, if the water pressure is too high, the drain valve on the sewage valve and the water separator will be drained and depressurized.

The instructions for each wall-hung boiler are different, and different wall-hung boilers** may also be different.

I have appeared twice, the first = time to find the reason, is that the water pressure is not enough, just add water.

Hello Answer, here to help you inquire: 1. The gas wall-hung boiler shows that E2 is the meaning of ignition failure, and the wall-hung boiler starts the thermocouple protection at this time, in order to prevent the effective measures of the wall-hung boiler from safety accidents. There are many reasons why the wall-hung boiler shows E2:

For example, the smoke pipe is too long, the water tank is blocked, the temperature at the thermocouple is too high, the thermocouple is damaged, the water control switch is faulty, etc., different types of faults should be dealt with in the corresponding way. If you do not have relevant professional knowledge, it is recommended to ask professional after-sales personnel to come to deal with it. 2. Reasons and solutions for wall-hung boilers to display E2 1. Smoke pipe is too long Solution:

If the smoke pipe of the wall-hung boiler is set too long, the exhaust gas generated by the wall-hung boiler during the work cannot be discharged quickly, and the internal overheating of the wall-hung boiler will be automatically started. In this case, it is only necessary to reduce the length of the smoke pipe. 2. Solution: Clogged water tank:

If there are too many foreign objects inside the water tank and block the wall-hung boiler, the hot water will not flow out, resulting in overheating of the wall-hung boiler. 3. The temperature at the thermocouple is too high Solution: If the temperature around the thermocouple is too high, the thermocouple will start the protection measures and display the E2 fault, in this case, you only need to adjust the thermocouple gear or pressure of the motherboard.

4. Thermocouple damage Solution: The thermocouple fault cannot correctly reflect the temperature of the wall-hung boiler, resulting in the appearance of E2 in the wall-hung boiler, the solution is very simple, just replace the thermocouple element. 5. Water control switch failure The failure of the water control switch will also cause E2**, and the micro switch fork cannot be automatically reset, in this case, it is recommended to adjust the water control switch.

Different wall-hung boilers** are different.

E2 is generally a blind bend to check the water pressure and temperature.

If you are prepared, the water pressure is normal.

It could be that the temperature is rising too fast.

This is to check whether the pump is made in imitation of the base.

1. The wall-hung boiler E2** is an ignition failure failure.

2. Causes and elimination of faults

1) The control circuit board is burned out. A new substrate is required.

2) The gas valve is damaged. The gas valve needs to be replaced.

3) Ignition needle leakage. The ignition pin needs to be replaced.

4) Sensor open circuit. The sensor needs to be replaced.

5) Gas nozzle blockage. The nozzle hole needs to be cleaned of carbonized dirt.

Cause of failure and troubleshooting: 1. The control circuit board is burned. A new substrate is required. 2) The gas valve is damaged. The gas valve needs to be replaced.

3) Ignition needle leakage. The ignition pin needs to be replaced. 4) Sensor open circuit. The sensor needs to be replaced. 5) Gas nozzle blockage. The nozzle hole needs to be cleaned of carbonized dirt.

1. The occurrence of E2 in the wall-hung boiler is an ignition failure failure. You can restart the wall-hung boiler and try again, if you still can't start normal combustion, it is recommended to take it directly to the after-sales maintenance office or contact customer service to ask technicians to come for testing and maintenance.

2. The main causes of the fault are: whether the gas is not supplied, whether the proportional valve is blocked, whether the proportional valve two-way switch connection line or proportional valve connection line is poorly connected, whether the proportional valve is damaged, whether the igniter is damaged, whether the connecting line of the igniter or the power connection line of the igniter is poorly connected, whether the connecting line of the induction needle is poorly connected, etc.

Cause of failure and troubleshooting: 1. The control circuit board is burned. A new substrate is required. 2) The gas valve is damaged. The gas valve needs to be replaced.

3) Ignition needle leakage. The ignition pin needs to be replaced. 4) Sensor open circuit. The sensor needs to be replaced. 5) Gas nozzle blockage. The nozzle hole needs to be cleaned of carbonized dirt.