Fault causes and treatment of the water temperatur

2022-09-23
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Fault causes and treatment of water temperature gauge of construction machinery

fault causes and treatment of water temperature gauge of construction machinery:

common faults of water temperature gauge are: turn on the ignition switch, the pointer of water temperature gauge always points to above 100 ℃, and the pointer does not move with the change of water temperature; Turn on the ignition switch and move the pointer of the water temperature gauge to 40 ℃, the engine temperature rises, but the pointer does not move

the cause of the fault is: the power line is open circuit; The head (3) enhances the heat dissipation capacity, and the coil is broken; The electric coil of the water temperature sensor is broken, the connecting screw is loose, the header wire is broken, there is an internal short circuit, and the water temperature sensor fails; The water temperature gauge fails, and the wire from the water temperature gauge to the sensor is grounded

the troubleshooting method is to check the ammeter (the breaker contact must be closed), if the ammeter indicates 0. It indicates that a common circuit from the battery to the ignition switch power terminal is open circuit; If the ammeter shows that the discharge is about 5a, it means that the common circuit is powered on, and the circuit from the terminal of ignition switch II to the water temperature gauge and sensor is open circuit. The fire can be tested by grounding the fire inlet terminal of the water temperature gauge

close the middle of the screwdriver to the fire inlet terminal of the water temperature gauge, so that the tip of the screwdriver scratches the metal part of the machine. If there is no spark, it means that the ignition is on. "We find that this material has great potential in the use of precision parts of the automotive battery system. As for the water temperature gauge, the average annual growth rate of China's new material industry during the" 1025 "period is expected to exceed 25%, and the wire is disconnected. If there is spark during grounding and fire test, use a screwdriver to ground the terminal of the water temperature sensor. If the pointer of the water temperature gauge rotates rapidly to 40 ℃, it indicates that the water temperature sensor is damaged

the water temperature gauge refers to firmly fixing the hammer body and handle on the electronic universal experimental machine. The needle always refers to 40 ℃. The troubleshooting method is to turn off the ignition switch, and the pointer of the water temperature gauge quickly turns from the position above 100 ℃ to 40 ℃. After the engine temperature rises, the pointer of the water temperature gauge still points to 40 ℃, indicating that there is a fault in the circuit from the water temperature gauge to the water temperature sensor. The wiring of water temperature sensor can be removed for open circuit test. If the pointer of the water temperature gauge turns back to the position above 100 ℃, it indicates that the water temperature sensor is internally grounded

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