Mitsubishi inverter alarms when there is no load!

Hehe, this glitch huh? Acceleration overcurrent, Mitsubishi inverter I haven't repaired, this situation if you rule out software and settings, then basically a problem with the module or drive circuit, or a fault in the detection circuit. Now non-professional maintenance personnel repair as long as there is an oscilloscope, multimeter (digital.

Pointer type) is basically OK, because the only thing that can be repaired is the drive and switching power supply, the input port, the power tube and the like, and there is no way to repair the other broken ones, the power and volume of the inverter are very related, the larger the power module (at present, the small power uses a seven-unit module, and the high-power basically uses a two-unit or one-unit module to reduce maintenance costs), the more filter capacitors, basically a power range uses a chassis.

The alarm is: "overcurrent in acceleration" You can first check whether the motor rotation is flexible and whether the acceleration time is " "You can modify the parameters to change the acceleration time p7 to about seconds. Or when the speed comes up, the stator and rotor friction occurs.

Dismantle the inverter motor line when it starts, if it also alarms, it is a failure of the inverter.

Ground fault must be caused by the inverter detecting a serious overcurrent signal, generally speaking, the motor winding to the ground short circuit will cause serious ground discharge caused by overcurrent, first of all, it can also be transferred to indicate that the module is good, the biggest possibility is that the driving circuit is aging or there are bad parts, generally easy to break is the optocoupling capacitor, the suspicion of optocoupler is relatively large, and it is easy to use it for a period of time.

Frequency transformer is generally an electrical energy control device that uses the on-off effect of power semiconductor devices to convert the power supply of power frequency to another frequency. The main circuit of the inverter can be roughly divided into two categories: the voltage type is the inverter that converts the DC of the voltage source into AC, and the filter of the DC loop is capacitor; The current type is an inverter that converts the DC of the current source into AC, and its DC loop filter is an inductor.

Summary. The "ERR" fault displayed by the Mitsubishi inverter is an undervoltage fault, which is usually caused by a problem with the voltage detection loop resistance or wiring, rather than the actual input voltage. Most of the undervoltage faults are due to the failure of the bus detection circuit, and Mitsubishi Inverter has also designed a thick film circuit for detecting voltage and current.

The under-voltage fault of the inverter is mainly due to the fact that the voltage of the main same circuit is too low (220V series is lower than 200V, 380V series is lower than 400V), and the main reason is that a certain road of the rectifier bridge is damaged or the thyristor three channels are not working properly, which may lead to the under-voltage fault; Secondly, the main circuit contactor is damaged, resulting in DC bus voltage loss and undervoltage in the charging resistor; In addition, the voltage detection circuit is faulty and the undervoltage problem occurs. First, you can look at the input side voltage to see if there is a problem, and then check the voltage detection circuit.

When the frequency of the Mitsubishi inverter is adjusted to more than 15Hz, the inverter displays "ERR" undervoltage protection action. Check from the rectifier part to the power input of the inverter, and find that the power input side is missing phase, because the voltmeter takes signals from the other two phases, the voltmeter indication is normal, and the inverter is not found in time.

Mitsubishi inverter err failure solution.

The "ERR" fault displayed by the Mitsubishi inverter is an undervoltage fault, which is usually caused by a problem with the voltage detection loop resistance or wiring, rather than the actual input voltage. Most of the undervoltage faults are due to the failure of the bus detection circuit, and Mitsubishi Inverter has also designed a thick film circuit for detecting voltage and current. The under-voltage fault of the inverter is mainly due to the fact that the voltage of the main same circuit is too low (220V series is lower than 200V, 380V series is lower than 400V), and the main reason is that a certain road of the rectifier bridge is damaged or the thyristor three channels are not working properly, which may lead to the under-voltage fault; Secondly, the main circuit contactor is damaged, resulting in DC bus voltage loss and undervoltage in the charging resistor; In addition, the voltage detection circuit is faulty and the undervoltage problem occurs.

First, you can look at the input side voltage to see if there is a problem, and then check the voltage detection circuit. When the frequency of the Mitsubishi inverter is adjusted to more than 15Hz, the inverter displays "ERR" undervoltage protection action. Check from the rectifier part to the power input of the inverter, and find that the power input side is missing phase, because the voltmeter takes signals from the other two phases, the voltmeter indication is normal, and the inverter is not found in time.

Dear, I hope it can help you.

Hello, glad to answer for you. <>

Mitsubishi inverter err fault solution: The ERE fault is due to: When the RES signal is on, the PU and the inverter cannot communicate normally.

2. Maintenance process: 1. According to the fault explanation, first check the normality of the res signal and eliminate the fault point; 2. Centralized troubleshooting of the connection between the PU (panel) and the inverter: replace the panel, the ERR is still displayed when powered on, and it cannot be reset, and the analysis fault is concentrated on the board, which needs to be further detected.

Measure the working power supply of the control card, find that there is no 5V voltage, replace the control card, and the fault is still there, so that it can be confirmed that the fault is concentrated in the switching power supply part of the power card. Single-board test switching power supply 3844 circuit, 3844 output is normal, when detecting the 5V feedback function, it is found that the output of 3844 is turned off when the feedback voltage is adjusted to, so it can be judged that the switching power supply 5V feedback loop is the root cause of the fault, according to this part of the circuit, the measurement of the resistance of the branch is normal, only the detection of the chip capacitor remains, now the compensation chip capacitor is removed, and the test feedback voltage rises to 5V when the output of the 3844 section of Qiye is turned off. After replacing the capacitor, the 5V feedback is normal, and the 5V feedback function is confirmed.

Summary. Hello <>

For the handling method of Mitsubishi frequency conversion governor alarm, you can start from the following aspects to troubleshoot and solve:1View Alarms**:

First of all, you need to check the alarm displayed when the fault occurs, and according to different **, you can determine the type and location of the fault, and troubleshoot it in a targeted manner. 2.Check the power supply and wiring:

Check whether the power supply is normal and whether the plug is loose or damaged; Check whether the wiring between the controller and the motor is good, whether the contact is tight, etc. 3.Check the temperature and humidity:

Excessive temperature or humidity can cause the inverter to malfunction, and it is necessary to check whether the ambient temperature and humidity meet the requirements. 4.Clean the strainer:

If you are using an air-cooled inverter, you need to clean the filter to prevent clogging and affecting the heat dissipation. 5.Replacement Components:

If the above methods do not solve the problem, you may need to replace the faulty components, such as IGBT modules, capacitors, etc.

How to deal with the alarm of Mitsubishi inverter governor.

Hello <>

For the handling method of Mitsubishi frequency conversion governor alarm, you can start from the following aspects to troubleshoot and solve:1View Alarms**:

First of all, you need to check the chain noise alarm displayed when the fault occurs, and according to different times, you can determine the fault type and location, and conduct targeted troubleshooting. 2.Check the power supply and wiring:

Check whether the power supply is normal and whether the plug is loose or damaged; Check whether the wiring between the controller and the motor is good, whether the contact is tight, etc. 3.Check the temperature and humidity:

Excessive temperature, high lead return or excessive humidity may cause the inverter to malfunction, and it is necessary to check whether the ambient temperature and humidity of the shed meet the requirements. 4.Clean the strainer:

If you are using an air-cooled inverter, you need to clean the filter to prevent clogging and affecting the heat dissipation. 5.Replacement Components:

If the above methods do not solve the problem, you may need to replace the faulty components, such as IGBT modules, capacitors, etc.

1.Before dealing with the alarm, safety measures should be taken, the power supply should be cut off, and the voltage should be guaranteed to be zero. 2.If the fault cannot be effectively solved, it is recommended to seek professional and technical personnel to help deal with it. Hope the above can be helpful to you.

Hello, very high wisdom Chaoxing for you to answer, Mitsubishi frequency converter alarm processing method, 1Turn off the power of the inverter first, wait for 5 minutes, and then turn the power on again to see if the err alarm will be eliminated automatically. 2.

It is necessary to check the manual of the inverter, find the corresponding fault ** and treatment method, and which judgment to deal with. 3.To prevent ERR alarms, it is necessary to pay attention to daily maintenance, regularly check whether the circuits and components of the inverter are damaged, and correctly set the system parameters and operating modes.

In short, to solve the ERR alarm problem, it is necessary to first analyze the cause, and then find the correct way to deal with it, and at the same time strengthen the daily management and maintenance of the inverter to avoid similar problems from happening again. <>

Motor or load failure, abnormal power supply voltage, overload or overheating, wrong parameter setting.

1. Motor or load failure: check whether the motor or load is working normally, whether the connection is loose or damaged, and deal with the car in time if there is any problem.

2. Abnormal power supply voltage: check whether the power supply voltage is stable and whether it meets the rated voltage requirements of the inverter, and adjust or replace the power supply in time if there is a problem.

3. Overload or overheating: Check whether the inverter is in an overload or overheated state, and if necessary, you can increase heat dissipation measures or call up the output power in mold adjustment.

4. Wrong parameter setting: check whether the parameter setting of the inverter is correct, such as starting frequency, current limit, protection parameters, etc., and adjust it in time if there is any problem. The inverter itself is faulty and needs to be replaced or repaired.