What is the fault code e9 of Hongri wall-hung boiler?

Solution: Reset the overheat protection;

The fuse is blown. ?

Solution: It is best to replace the fuse;

3. Whether the Hall sensor is stuck.

Solution: just clean up the sundries;

4. The temperature measuring head has stolen goods.

Solution: clean the stolen goods of the temperature measuring head;

5. The water pressure is abnormal.

Solution: The water pressure is too low, please increase the water pressure.

Extended data:

Maintenance method

1, you don't need to keep warm in spring and autumn, you have to put water out of the radiator and inject new water.

2. Turn on the water inlet switch and turn it off when the pressure reaches 2 (the pressure should not exceed 3);

3. Open the vent valve of the last radiator, and a strange smell of "old water" will be sprayed out;

4. When the "old water" does not spray or flow out, close the air leakage valve, turn on the water inlet switch for the second time, and pressurize it to 2 or 3;

5, repeatedly drain water and add water n times, until it is clean.