Any product is prone to problems after a period of use. When a problem first occurs, it is important to first determine whether it is a problem with the inverter itself or the surrounding circuits. The following inverter brand manufacturers tell you what to do if the inverter fails.

Inverter brand manufacturers believe that inverter error codes are important

When the inverter itself fails, an error code is often displayed. Generally, there are alarms such as overcurrent, overload, overvoltage, undervoltage, grounding error, and insufficient output. According to the content of these alarms, the purpose is to find the problem according to the symptoms. The error code display of each inverter may be different, but the content is roughly the same, so it is often necessary to query the document error table according to the code displayed on the panel.

You can turn off the machine first. It is similar to the disappearance of static electricity. The main board seems to have run out of power. It is like powering on again. At this time, please confirm whether there is a fault code. If not, it is usually caused by theft or load changes caused by poor contact. If there is still, it can be proved that it is an internal problem of the inverter. Of course, this is just an outline and may not be correct. The actual situation is more complicated.

For example, overcurrent, at this time you can turn off the power and then turn it on again. If it is still overcurrent, cut off the connection line between the inverter and the motor, re-power on, whether there is an overcurrent code, if so, it generally indicates an internal problem. If the fault disappears, the insulation of the cable or motor is often not good. At this time, you can find an insulation meter and measure the insulation resistance of the motor and cable respectively to determine whether it is less than 5 MegO. If this is the case, the motor will need to be repaired separately or the cable replaced.

The inverter brand manufacturer believes that if it is an internal problem of the inverter, alarms such as overcurrent and grounding are often broken down by the IGBT module, so the main circuit can be measured by a multimeter to easily determine whether there is a short circuit. Of course, the optical coupling and interception container on the driver board often fail. This kind of repair requires a certain amount of electronic knowledge, and some industrial mechanics can help.

Output components and the like are often three-phase unbalanced, and the connection between the inverter and the motor must also be separated. The imbalance of the motor can be determined by measuring whether the resistance is consistent by a multimeter.

Many reasons for insufficient voltage are that the inverter has been used for a long time, and the capacity has aged, resulting in insufficient capacity. You can find the same specifications for replacement.

Overvoltage is often caused by problems such as high grid voltage, too short deceleration time, and heavier load.

If an error occurs (such as some ERR) and the power cannot be turned on again, it is all a motherboard type failure and the motherboard needs to be replaced.

If nothing is displayed, the switching power supply is usually burned or the power supply is not working properly.

Inverter brand manufacturers summarize: After all, the inverter is connected to external objects, and in many cases, the fault is not caused by itself. It is necessary to find the inverter manual and the electrical structure diagram of the on-site circuit according to the brand specifications. According to the drawings, the overall start-stop logic of the inverter needs to be sorted out. This situation is very important when there is no alarm after the inverter is turned off.