Q：Common faults of steam generators and their solutions

A：

The steam generator generates a steam source of a certain pressure by pressurizing and heating, and is used in industrial production and daily life. Generally speaking, the steam generator can be divided into two parts, namely the heating part and the water injection part. Therefore, the common faults of steam generators can be roughly divided into two parts. One is the common faults of the heating part. Another common fault is the water injection part.

1. Common faults in the water injection part

(1) The automatic water filling generator does not fill water:
(1) Check whether the water pump motor has power supply or lack of phase, and make sure it is normal.
(2) Check whether the water pump relay has power supply and make it normal. The circuit board does not output power to the relay coil. Replace the circuit board.
(3) Check whether the high water level electrode and the casing are connected properly, and whether the endpoints are corroded and make sure they are normal.
(4) Check the water pump pressure and motor speed, repair the water pump or replace the motor (the water pump motor power is not less than 550W).
(5) For any generator that uses a float level controller to fill water, in addition to checking the power supply, check whether the low water level contacts of the float level controller are corroded or reversely connected. It will be normal after repair.

(2) The automatic water injection generator keeps filling water:
(1) Check whether the voltage of the water level electrode on the circuit board is normal. No, replace the circuit board.
(2) Repair the high water level electrode to make it in good contact.
(3) When using the generator of the float level controller, first check whether the high water level contacts are in good contact, and secondly check whether the float floats or the float tank is filled with water. Just replace it.

2. Common faults in the heating part
    (1) The generator does not heat:
(1) Check whether the heater is in good condition. This check is simple. When the heater is immersed in water, use a multimeter to measure whether the shell is connected to the ground, and use a Magmeter to measure the insulation level. Check the results and the heater is intact.
(2) Check the power supply of the heater, use a multimeter to measure whether the incoming power supply is out of power or lacks phase (the phase voltage must be balanced), and the incoming power supply and grounding wire are normal.
(3) Check whether the AC contactor coil has power. If there is no power, continue to check whether the circuit board outputs 220V AC voltage. The inspection results show that the output voltage and circuit board are normal, otherwise replace the components.
(4) Check the electrical contact pressure gauge. The electric contact pressure gauge is the voltage output from the circuit board. One phase is to control the high point, and the other phase is to control the low point. When the water level is appropriate, the electrode (probe) is connected, so that the output voltage of the electric contact pressure gauge is connected to the AC contact. device and start heating. When the water level is not enough, the electric contact pressure gauge has no output voltage and the heating is turned off.

Through item-by-item inspection, damaged parts are found to be replaced in time, and the fault is immediately eliminated.

The generator controlled by a pressure controller has no water level display and no circuit board control. Its heating control is mainly controlled by the float level meter. When the water level is appropriate, the floating point of the float is connected to the control voltage, causing the AC contactor to work and start heating. This kind of generator has a simple structure and is widely used in the market today.Common non-heating failures of this type of generator mostly occur on the float level controller. First check the external wiring of the float level controller and whether the upper and lower control lines are connected correctly. Then remove the float level controller to see if it floats flexibly. At this time, you can use manual operation and use a multimeter to measure whether the upper and lower control points can be connected. After checking everything is normal, then check whether there is water in the floating tank. If water enters the float tank, replace it with another and the fault will be eliminated.

   (2) The generator heats continuously:
(1) Check whether the circuit board is damaged. The control voltage of the circuit board directly controls the coil of the AC contactor. When the circuit board is damaged and the AC contactor cannot cut off the power and heats continuously, replace the circuit board.
(2) Check the electrical contact pressure gauge. The starting point and high point of the electric contact pressure gauge cannot be disconnected, so that the AC contactor coil always works and heats continuously. Replace the pressure gauge.
(3) Check whether the pressure controller wiring is connected correctly or the adjustment point is set too high.
(4) Check whether the float level controller is stuck. The contacts cannot be disconnected, causing them to heat continuously. Repair or replace parts.