How to adjust the fault of SV inverter, fault inquiry and operation method of SV inverter

The fault adjustment mode of SV inverter is generally input by the optocoupler to the MCU alarm signal, and the input side (some of which are the output side) of the optocoupler can be short-circuited to shield the fault alarm.

The overcurrent and overvoltage alarms are used by the post-circuit of the current and voltage detection circuits, and the voltage comparator outputs a fault signal to the MCU to change the comparative voltage of the voltage comparator or change the level state of the output terminal, which can shield the fault.

If you use software (panel adjustment) to shield the fault, you should consult the manufacturer's designer, I don't know if you can tell me.

List of common faults of SV inverter.

Failure**) failure supply

Fault Name) Supply voltage failure.

Fault description) Problem with the internal power supply of the regulated version**.

Possible cause) Faulty supply voltage Faulty inside the inverter may cause a fault.

Solution) Send it for repair.

Fault**) under voltage

Fault Name) Undervoltage.

Fault description) The DC Link voltage of the inverter is below the minimum threshold set by the set input voltage.

Possible causes) The DC bus drops below 65% of the rated value The most common cause is the failure of the equipment power supply Undervoltage faults can also be caused by internal faults in the inverter.

Check) If the power supply voltage is temporarily interrupted, it can be reset and restarted. Check the device input If the device has a normal power supply and an internal fault occurs, please contact the SIEI** provider.

Solution) Measure whether the voltage at both ends of the DC is consistent with the Monitor DC Linkvoltage, if it is inconsistent, there may be a problem with the detection loop, and this fault can be shielded and used.

Fault**) over voltage

Fault Name) Overvoltage.

Fault description) The DC Link voltage of the inverter is higher than the maximum threshold set by the set input voltage.

Possible cause) The voltage of the DC link inside the inverter exceeds 35% of the rated value The deceleration time is too short The equipment is affected by high overvoltage peaks.

Check) Adjust the deceleration time.

Solution) 1 Check whether the braking resistor is disconnected, whether the resistance value matches the recommended one, 2 Bu Res ol time setting is appropriate.

The fault inquiry and operation method of SV inverter are as follows:

Find the monitor menu of SV inverter, press the Enter key to enter, press the 5 key twice to see the alarmlog, press Enter to enter, you can see the fault record.

When the indicator light alarm flashes red on the LCD screen of the inverter, it means a fault. At this point, you should do the following: press the shift key on the inverter panel first, and then press the alarm key.

You will see that the lower line of the LCD screen display menu screen is the fault**, and the maintenance personnel should write down the displayed content, so as to inquire about the inverter-related faults in time**, and eliminate the elevator fault according to the fault record.

SV inverter is the latest generation of vector controller dedicated to the elevator control part. This series of products has the main characteristics of strong adaptability, easy operation and high running performance. The wide choice of control types (vector, brushless, sensorless or VF control) allows the device to be used for a variety of different purposes.

The DGFCLIFT+win+drive development software is a modern control system that makes it possible to make individual applications different.

Faults

Failure, the phenomenon that the equipment "loses the specified function" or endangers safety for some reason in the process of work. Failures are sometimes referred to as a type of failure, or they can be lost in the work of the equipment or a failure, but these failures are repairable.

The occurrence of faults is random, gradual and sudden, and the factors that cause failures are very complex, and most of the faults can be controlled within a predetermined period through regular inspection, maintenance, and analysis and summary.

When the alarm indicator on the LCD screen of the inverter flashes red, it means that the inverter has reported a fault. At this point, the following should be done immediately: press the inverter first.

Shift key on the panel.

Press the Alarm ( ) button again. At this time, you will see the LCD menu alarm list, one row on the screen is the alarm list, and the next line on the screen is the fault**. The maintenance personnel should make a note of what is shown in the next line:

shift+alarm( ) Xiwei inverter fault record query:

Find the monitoring menu of the inverter, press enter to enter, press the button twice to view the alarm log. Press Enter.

Enter, you can see the fault record and the time when the hunger beat failure occurred. For example:

Failure hits large time) (failure**).

Meaning of fault **: 22:39: 20230170 undervoltage inverter is disabled.

The DC link voltage of the inverter is below the minimum threshold set by the set input voltage of 12.

The meaning of the alarm of the failure of the West Wei inverter.

One or more power circuits in the control section are faulty.

The DC link voltage of the inverter is lower than the set minimum threshold of input voltage, the voltage of the DC link of the inverter is higher than the maximum threshold of the set input voltage, and the gate desaturation induction circuit detects the instantaneous overcurrent output current sensor of IGBT.

Detects the relative discharge of the transient overcurrent output of the IGBT.

Hello dear, how to repair the sequencer failure of the Xiwei inverter? Pro, Failure**:sequencer Fault Name:

Inverter failure The reason for the change: when the device is powered on or reset, the input is connected to 24V The device is configured as a running terminal Solution: Prompt that there has been an alarm Variable-frequency drive (VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply.

The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit, microprocessor unit, etc. The inverter relies on the interruption of the internal IGBT to adjust the voltage and frequency of the output field or power supply, and provides the required power supply voltage according to the actual needs of the motor, so as to achieve the purpose of energy saving and speed regulation. With the continuous improvement of industrial automation, inverters have also been widely used, I hope mine can help you<>