The reason why the excavator computer board burned

I often met many excavator mains, pulling my head and shaking my head, saying that the computer board of the excavator was burned again, and the meter would not light up. In fact, most of these problems are man-made failures. Usually, the excavator computer panel and controller are in the thousands to more than 10,000 yuan. It is inevitable that the heartburn will burn out. Therefore, in the use of the excavator, pay attention to the following On the one hand, it can reduce the probability of burning the excavator electric spare parts of the excavator and cause losses.

1

If the battery line pile head is in poor contact and the contact surface is oxidized, the damage probability of the computer board and the instrument board is greatly improved. The principle is the same as that of the household appliance. If the fuse box is not in good contact or the switch contact is not good, the bulb always changes light and dark. It is easy to burn the bulb. The electrical system on the excavator is the same as the electrical appliance in the home, so you must pay attention to whether the contact of the battery pile head is secure.

2

The battery line is reversed. This is a very serious mistake. The damage rate is extremely high. The light is burnt and the wire is burnt. The power circuit and CPU of the computer board instrument are burnt out. Some of the excavator lines have diodes on the line, and the power supply is positive and negative. In the case of reverse connection, the basic diodes will also be burnt out, and the fuses will certainly not be spared.

3

If the throttle motor fails or does not operate normally, the throttle motor used in the excavator has a DC motor and a stepping motor. If the motor is overheated and short-circuited, it is extremely easy to burn out the throttle control circuit of the computer board. This is an inevitable failure. The throttle motor assembly of the machine is kept clean and clean, and the probability of failure is reduced. When the excavator is powered on, the throttle motor connecting rod of the excavator is not pulled. If it is forced to move the throttle lever, it is extremely It is possible that the computer board of the excavator will burn out.

4

When the cold day digging machine is difficult to start, add the battery to the 36V power supply to start the machine. This operation method is often used on the old digging machine. If it is operated on a machine with a computer board controlled by a newer model, it may cause problems and it is easy to burn. Power relays and safety relays, when the two relays burn out and cause internal coil short circuit, the computer board and instrument on the excavator will also burn out.

5

Digging the computer board or instrument into the water, this phenomenon is very common, and the destructiveness is also great, especially when the computer board is charged with water inside, basically the internal circuit board copper foil is completely burned and oxidized and cannot be repaired. The situation is that the computer board plug harness is in the water, and the fault caused is that the pin of the computer board is oxidized. The phenomenon is that the pin is in poor contact with the solder joint of the circuit board.

6

The maintenance master mishandled, many excavators maintenance masters do not understand the circuit, when they suspect that an electronic part is not working properly, they will think of using the short circuit method to test whether the line is normal. This line short circuit operation method is the least recommended in circuit maintenance. Adopted, the damage is very large.

The above is the possibility that the excavator computer board instrument is easy to burn out. The use and maintenance of the machine are usually carried out according to the regulations. The important parts of the excavator are not so easily damaged.

More details please contact:

lancy@jinyaojn.com，0086-15634527866

Jnjmzm@jinyaojn.com，0086-18764778812

anne@jinyaojn.com，0086-15562346345