What should I do if E2 appears in the wall-hung boiler? What should I do?

Cause and elimination of failure:

1. Control circuit board burned. Need to replace the new substrate.

The air valve is damaged. The air valve needs to be replaced.

3. The ignition needle leaks electricity. The ignition needle needs to be replaced.

4. The sensor is open. The sensor needs to be replaced.

5. The gas nozzle is blocked. It is necessary to clean the carbonized dirt in the nozzle hole.

A good control system is an effective guarantee for the normal and safe combustion operation of the wall-hung boiler, which is of great significance for detection, maintenance, daily operation and fault analysis. Because the startup self-inspection, safety protection, ignition operation and working condition change of the wall-hung boiler are largely completed by the controller.

Extended data

Before use, users should check whether the indication of boiler water pressure gauge is within the specified range. The standard water pressure specified in the manual is 1- 1.2bar. However, in practice, because there is some air in the heating system and boiler, when the boiler is running, the air in the system is continuously discharged from the exhaust valve in the boiler, and the pressure of the boiler will drop irregularly.

When heating in winter, the water in the heating system expands when heated, and the water pressure in the system will rise, and then the pressure will drop after the water is cooled. This is a normal phenomenon. Experiments show that as long as the water pressure in the wall-hung boiler is kept between 0.5- 1.5bar, the normal use of the wall-hung boiler will not be affected at all.

If the water pressure is lower than 0.5bar, the domestic hot water may become hot or cold, or it may not start normally. If the water pressure is higher than 1.5 bar, the system pressure will increase during heating. If it exceeds 3bar, the safety valve of the boiler will automatically drain water, which may cause unnecessary losses. Under normal circumstances, you can replenish water once a month or two? .

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