During the use of the A1000 inverter, we sometimes encounter fault codes that appear due to machine failures. How much do you know about these fault codes? This article is mainly about the introduction of A1000 inverter, and elaborates the fault code of A1000 inverter and its fault view in detail. Use a special motor or a motor with more than the maximum applicable capacity/On the output side of the inverter, the electromagnetic switch is ON/OFF GF--ground Reason: Grounding occurred on the output side of the inverter PUF-Fuse blown Cause The output side of the inverter is short-circuited, grounded, and the output transistor is damaged. Check whether there is a short circuit between the following terminals, if the output transistor is damaged on the short circuit side. B1 (+3) UVW-UVW OV-Main circuit overvoltage Reasons: 1. The deceleration time is too short, and the energy generated from the motor is too large 2. The power supply voltage is too large Countermeasures: extend the deceleration time or connect a braking resistor Solution: Extend the deceleration time or connect a braking resistor. UV1-Main circuit low voltage Reasons: 1. Phase loss at the input. 2. There is an instantaneous power failure. 3. The power input terminal is loose. 4. The voltage change of the input power is too large. UV2-Control power supply abnormal Countermeasures: 1. Try to turn on/off the power 2. Continuously replace the inverter in case of failure. UV3-prevents the impact circuit from malfunctioning. Countermeasures: 1. Try to turn on/off the power 2. Continuously change the frequency converter while applauding. Main circuit voltage failure Reason: 1. The input power is out of phase. 2. Instantaneous power failure occurred. 3. The wiring terminal of the input power supply is loose. 4. The voltage fluctuation of the input power supply is too large 5. The phase voltage is not well balanced LF-output phase loss Reason: 1. The input wire is broken. 2. The motor winding wire is disconnected 3. The output terminal is loose. OH-1. The heat sink is overheated 2. The internal cooling fan of the inverter stops (above 18.5KW) Reasons: 1. The surrounding temperature is too high. 2. There are heating elements around 3. The inverter cooling fan stops running. OH3-Motor overheating alarm Reason: the motor is overheated Countermeasures: 1. Adjust the load size, acceleration and deceleration time and cycle. 2. Adjust the V/F characteristics 3. Determine the setting of E2-01 (motor rated current). OH4-Motor overheating fault Countermeasures: 1. Adjust the load size, acceleration and deceleration time and cycle. 2. Adjust the V/F characteristics 3. Confirm the setting of E2-01 (motor rated current). RH-type braking resistor overheated Reason: The deceleration time is too short, and the motor generates too much energy. Countermeasures: 1. Reduce the load, extend the deceleration time, and reduce the speed. 2. Replace the braking resistor unit. RR-Built-in brake transistor failure Countermeasures: 1. Try to turn on/off the power 2. Continuously replace the inverter in case of failure. OL1 motor overload Reasons: 1. The load is large, the acceleration and deceleration time, and the cycle is too short. The voltage of the V/f-characteristic is high. 3. The setting value of E2-01 (motor rated current) is inappropriate Countermeasures: 1. Adjust the size of the load, acceleration and deceleration time, cycle 2. Adjust the V/f characteristics 3. Confirm the setting of E2-01 (motor rated current) OL2-Inverter overload Reasons: 1. The load is too large, and the acceleration and deceleration time and cycle are too short 2. The voltage of the V/f characteristic is high. 3. Small inverter capacity OL3-over torque detection 1 Countermeasures: 1. Confirm whether the setting values ​​of L6-02 and L6-03 are appropriate. 2. Confirm the use of the machine and eliminate the cause of the failure. OL4-over torque detection 2 Countermeasures: 1. Confirm whether the setting values ​​of L6-05 and L6-06 are appropriate. 2. Confirm the use of the machine and eliminate the cause of the failure. OL7-High-speed slip brake OL Reason: follow-up The inertia of the load rotation is too large. Countermeasures: 1. Check the inertial load 2. The deceleration time that does not occur OV should be less than 120 seconds. UL3-Insufficient torque detected 1 Countermeasures: 1. Confirm whether the setting values ​​of L6-02 and L6-03 are appropriate. 2. Confirm the use of the machine and eliminate the cause of the failure. UL4-Insufficient torque detected 2 Countermeasures: 1. Confirm whether the setting values ​​of L6-05 and L6-06 are appropriate. 2. Confirm the use of the machine and eliminate the cause of the failure. Speeding operating system the reason: 1. Overshoot/undershoot. 2. The specified speed is too high. 3.1 The setting values ​​of F1-08 and F1-09 are inappropriate. Countermeasures: 1. Adjust the income again. 2. Adjust the command loop and command gain. three. Confirm the setting values ​​of F1-08 and F1-09. A) Static test 1. Test the rectifier circuit Find the P and N terminals of the internal DC power supply of the inverter, adjust the multimeter to resistance X10, connect the red meter rod to P, and the black meter rod to R, S, and T respectively. Normally, there are several tens of ohms of resistance. And basically balanced. On the contrary, connect the black meter rod to the P terminal, and the red meter rod to R, S, T in turn, and there is a resistance close to infinity. Connect the red meter stick to the N terminal and repeat the above steps, you should get the same result. If there are the following results, it can be determined that the circuit has been abnormal, A. The resistance of the three-phase imbalance, indicating that the rectifier bridge is faulty. B. When the red meter rod is connected to the P terminal, the resistance is infinite, and it can be concluded that the rectifier bridge is faulty or the starting resistance is faulty. 2. Test the inverter circuit Connect the red meter rod to the P terminal, and the black meter rod to U, V, and W respectively. There should be a resistance value of several tens of ohms, and the resistance value of each phase is basically the same, and the reverse phase should be infinite. Stick the black meter to the N end and repeat the above steps to get the same result, otherwise it can be determined that the inverter module is faulty. Two) Dynamic test The dynamic test can only be carried out after the test result is normal, that is, power on and test the machine. The following points must be paid attention to before and after power-on: 1. Before powering on, confirm whether the input voltage is wrong. Connecting the 380V power supply to the 220V-class inverter will cause explosions (fried capacitors, varistors, modules, etc.). 2. Check whether each broadcast port of the inverter is properly connected, and whether the connection is loose. Abnormal connection may sometimes cause the inverter to malfunction, and in severe cases, it may explode. 3. Check the fault display content after power-on, and preliminarily determine the fault and its cause. 4. If no fault is displayed, first check whether the parameters are abnormal, and after resetting the parameters, start the inverter under no-load (no motor connection), and test the U, V, and W three-phase output voltage values. If there is a lack of phase, three-phase unbalance, etc., the module or drive board is faulty. 5. When the output voltage is normal (no phase loss, three-phase balance), the load test should be a full load test as much as possible. Three) Fault judgment 1. The rectifier module is damaged It is usually caused by grid voltage or internal short circuit. After eliminating the internal short circuit, replace the rectifier bridge. When dealing with faults on site, check the user's power grid conditions, such as the power grid voltage, and whether there are equipment that pollutes the power grid such as electric welding machines. 2. The inverter module is damaged It is usually caused by motor or cable damage and drive circuit failure. After repairing the drive circuit and testing the drive waveform in good condition, replace the module. After replacing the drive board in the field service, pay attention to checking the motor and connecting cables. After confirming that there is no fault, the inverter can be operated. 3. No display after power-on It is usually caused by the damage of the switching power supply or the damage of the soft charging circuit so that the DC circuit has no direct current. Such as the starting resistance is damaged, and the operation panel is damaged. 4. Display over-voltage or under-voltage Usually caused by lack of input phase, circuit aging and circuit board damp. The solution is to find out its voltage detection circuit and detection point, and replace the damaged device. 5. Display over current or short circuit to ground It is usually due to damage to the current detection circuit. Such as Hall element, operational amplifier circuit, etc. 6. The power supply and drive board start to display overcurrent It is usually caused by damage to the drive circuit or inverter module. 7. No-load output voltage is normal, and overload or overcurrent is displayed after loading It is usually caused by improper parameter settings, aging of the drive circuit, and damage to the module. That's it for the related introduction of Yaskawa A1000 inverter. If you have any deficiencies, please correct me. 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