Siemens 440 inverter maintenance, 4 kilowatt inverter reported F022 failure

TECO's inverter motors adopt the AC speed regulation method of "special inverter induction motor + inverter", which greatly improves the degree of mechanical automation and production efficiency, greatly improves the miniaturization of equipment and increases comfort, and is now replacing the traditional mechanical speed regulation and DC speed regulation schemes. Frequency conversion speed regulation has become the mainstream speed regulation scheme, which can be widely used in continuously variable speed transmission in all walks of life. Especially with the increasingly wide application of inverter in the field of industrial control, the use of inverter motor is becoming more and more extensive, it can be said that due to the superiority of inverter motor in frequency conversion control compared with ordinary motors, it is not difficult for us to see the figure of inverter wherever the inverter is used.

There are three sets of data that can be set in 0731, and the default is the first group, not only this parameter, but many parameters can be set with 3 sets of data. You 0731 is set to the number inside, frequency conversion failure, 0, closed, indicating that when there is no fault, it is closed, and the output is 0; There is a fault, the relay is disconnected, the output is 1, I haven't been in contact for a long time, I don't know if it's not, if you find that 18,20 is not on, you can pick up another 19,20, see if it can be used?

The overvoltage fault of the Siemens inverter shows the fault** as F0002. There may be several reasons for the overvoltage failure of Siemens inverter maintenance:

1) Disable DC loop voltage controller (P1240=0).

2) The voltage of the DC loop (R0026) exceeds the setting of the challenge level (P2172) parameter.

3) Overvoltage fault occurs due to the high voltage of the power supply or the motor is in the state of power generation, and the current is fed back to the DC circuit.

4) The inverter slope descends too fast, or the motor is in a regenerative braking state due to the rotation driven by a large inertia load.

1.The power supply voltage must be within the range specified in the nameplate of the inverter;

2.The DC loop voltage controller must be effective and correctly parameterized;

3.The ramp descent time must match the inertia of the load;

4.The required braking power must be within the specified limits.

How to solve the failure of F0002 reported by Siemens inverter? Hello, pro 1, f0002 is an overvoltage fault. 2. Possible causes of failure - 1) The voltage value of the DC circuit exceeds the trip threshold; 2) Overvoltage caused by high power supply voltage, or motor in regenerative braking mode; 3) The slope descends too fast, or the motor is rotated by a large inertia load and is in a regenerative braking state.

3. General solutions - 1) Check the power cable of the motor and the grounding of the motor to see if there is a phenomenon such as broken cable skin or inappropriate grounding. 2) Increase the value of the ramp parameters P1120 and P1121 of the inverter. 3) Is there a braking resistor?

If it is not configured, pay attention to setting the parameter p1240 1;If the braking resistor is configured, pay attention to the setting parameter P1240 Generally speaking, the inverter is easy to report undervoltage fault when the frequency rises, and it is easy to report overvoltage fault when the frequency drops. Overvoltage faults are easy to occur during deceleration and braking. If the power supply voltage of your inverter is too high, in that case, the inverter will also report F0002.

The F0002 overvoltage alarm of Siemens inverter MM440 indicates that the following reasons may occur:

1. The voltage of the DC circuit (R0026) exceeds the trip level (P2172).

2) Overvoltage caused by high power supply voltage, or motor in regenerative braking mode;

3) The slope descends too fast, or the motor is rotated by a large inertia load and is in a regenerative braking state.

Troubleshooting: 1. Check the following items according to normal procedures

1. The power supply voltage (P0210) must be within the range specified in the nameplate of the inverter.

2. The DC loop voltage controller must be valid (P1240) and correctly parameterized.

3. The ramp descent time (P1121) must match the inertia of the load.

4. The required braking power must be within the specified limit.

2. Try to check the following:

1. Shake off the load to see if the no-load inverter reports an alarm, there may be an alarm caused by the motor grounding.

2. Maybe the capacity of resistance braking is too small, try to set the acceleration time and deceleration time to a larger one, or add a braking unit.

3. The power supply voltage is unstable, or there is an impact load nearby, which interferes with the system and leads to false alarm failure.

1) First of all, A0501 is just an alarm signal, which is designed to remind users to pay attention to whether there is an abnormal situation.

2) Have you completed the motor optimization process as required, if not, you must complete the optimization process first.

3) If the optimization has been completed and the situation is still the same, you can increase the value of the parameter p1120 appropriately.

Also, more information about A0501 - A0501: Current Limiting.

Possible causes of alarm:

1.The power of the motor does not match the power of the inverter.

2.The connecting wires of the motor are too short.

3.Ground fault.

Troubleshooting and what to do:

Check the following.

1.The power of the motor P0307 must correspond to the power of the frequency converter P0206.

2.The length of the cable must not exceed the maximum allowable value.

3.There must be no short circuit or ground fault inside the motor cable and motor.

4.The motor parameters of the input inverter must be consistent with the actual motor used.

5.The stator resistance value P0350 must be correct.

6.Whether the cooling air duct of the motor is blocked, whether the motor is overloaded.

7.Increase ramp ascent time.

8.Decrease the number of boosts.

The MM440 inverter has a very characteristic function, that is, the current limiting. When the current value of the inverter (output current, which can be observed by parameter R0027) reaches the rated current of the inverter, the inverter will stop rising in frequency or automatically reduce the frequency in an attempt to bring the current down.

F0022HWMONITORINGFAULT off2

Causes

Hardware failures (r0947=22 and r0949=1) caused by the following events:

1) DC intermediate circuit overcurrent = IGBT short circuit;

2) Short circuit of the braking unit;

3) Grounding fault caution;

4) The IO plate is not inserted properly.

Diagnosis and response

First, you must verify whether the fault is a frequent failure (i.e., the drive cannot be started without a fault) or an intermittent failure (which occurs occasionally or under certain defined operating conditions).

Frequent F0022 faults

1. Check the IO board. It must be fully inserted into place.

2. Is there a ground fault or short circuit at the output end of the inverter or IGBT? Disassemble the motor cable and weigh it to determine which is the case.

If this failure occurs frequently while disconnecting all external circuitry connections (from the power supply), it is almost certain that the unit is damaged and should be repaired.

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Intermittent F0022 failures

Such faults should be considered "overcurrent". Intermittent F0022 failures can occur in the following situations:

1. Sudden change of load or mechanical blockage.

2. The slope time is very short.

3. Optimization of sensorless vector control.

4. The installed braking resistor is incorrect and the resistance value is too low.