The wall-hung boiler shows high temperature fault, mostly because the outlet temperature of heating water is too high during heating operation; Different brands of wall-hung boilers display different fault codes;

First, the reason for the failure:

1, high temperature failure of wall-hung boiler, mostly mechanical failure of waterway circulation system;

2. In a few cases, it belongs to the fault of the gas supply system.

Second, the accessories may fail:

The wall-hung boiler is in high temperature fault, and one of the following components may fail (the probability of failure at the same time is very small):

1, pipeline valve;

2. water pump;

3. Three-way motor;

Three, troubleshooting procedures:

The after-sales center of wall-hung boiler eliminates the problems one by one according to the systematic method of "seeing, listening and asking", and accurately determines the final failure.

1 Hope:

(1) Check and confirm whether the water supply and return valves of the floor heating system are open;

(2) At the same time, observe whether the domestic hot water is normal and stable in the summer mode of the wall-hung boiler.

If the above situations (1) and (2) are confirmed, it is basically determined that it is a mechanical failure of the waterway circulation system. Perform mechanical troubleshooting.

2. Look, smell and cut: (3) Check and confirm whether the water supply and return valves of the floor heating system are open; Check the water pump and the three-way motor in turn, focusing on the water pump.

(1) Touch the water pump to confirm whether it rotates;

(2) Touch the water pump to confirm whether it is too hot.

③ Eliminate the cause of the water pump? ;

(4)? Troubleshooting of three-way motor

The water pump treatment method comprises the following steps:

(1) Open the shell of the wall-hung boiler with a Phillips screwdriver.

(2) Remove the nut of the water pump in the wall-hung boiler with a screwdriver (shaped like a coin slot, as shown in the figure), and then observe whether the bearing of the water pump rotates.

(3) If the water pump bearing does not rotate, put it into the slot on the outer side of the bearing with a flat screwdriver, and manually turn the screwdriver to drive the pump bearing to rotate.

(4) After the water pump runs normally, reset the disassembled part of the wall-hung boiler.

If the high temperature fault still occurs after the water pump is treated, the "three-way motor" fault is eliminated. There are two ways to check and confirm whether the three-way motor is damaged:

(5) The manual three-way motor works normally, the boiler starts normally, and the heating water temperature is normal and stable;

(6) At the same time, measure whether the telecommunication signal input of the three-way motor is normal.

If points (5) and (6) are confirmed, it is determined that the three-way motor is damaged, repaired or replaced.

Four, maintenance cases:

The third phase of Shangdong Sunshine was renovated for the second time by Mr. Yang's family. When the owner renovated for the first time, he installed floor heating. In the second transformation, the wall-hung boiler and the main floor heating pipe remained, but the floor heating coil was updated. After renovation and installation, it was found that ariston displayed fault code E9 when debugging floor heating.

Typical failure phenomena:

(1) Domestic hot water is normal; Under the heating condition, the water temperature of the wall-hung boiler quickly rises above 80 degrees, and the fault code E9 is displayed.

(2) Touching the hand pump will be very hot;

(3) When the wall-hung boiler reports fault E9, turn off the wall-hung boiler. Switch the summer mode, turn on the tap of domestic hot water, and the domestic hot water will have an instantaneous high temperature. Back to normal later.

Check and confirm according to the above method, and finally find that the water pump is burnt out, and replace the water pump to return to normal.

According to the actual situation, it is judged that the boiler should be used for more than 5 years and has not been maintained on time. In addition, the interval between two sealing and decoration is too long, which leads to the pump being stuck and burned out.