11。 If the interface board does not communicate with the monitor and does not establish communication with the interface board, the interface board will reset the monitor every 5 seconds, and if the communication is not established within 3 minutes and 30 seconds, it will be judged as a serious fault. Whether the communication line is normal, check whether the terminal is correct; Whether the I/O board is working properly. Especially the operating voltage; Whether the chip outside the I/O main control board is plugged in.
12。 Parameter errorWhen modifying the parameters, if the set parameters are wrong (this fault may be reported during synchronous vector control), the parameter error fault will be reported, please modify the parameters again, and press the reset button.
13。 When the local high-voltage disconnect button is closed or the high-voltage disconnect contact on the interface board is closed, the system will report an external fault. whether the high-voltage breaking button is pressed; Whether the high-voltage disconnecting terminal is short-circuited; The interface board is broken;
14。 High voltage power loss The upper high voltage power supply disappears. It is generally caused by normal opening operation. If there is an abnormal high-voltage power failure (no fault record, no opening operation), please check the opening circuit of the upper switch cabinet.
15。 When the output current of the inverter exceeds 1.5 times of the rated current of the inverter, the inverter will be overcurrent protected. Whether the output voltage detection board is normal, and whether there are obvious short circuit and discharge traces; Whether the optical fiber is plugged tightly, and whether the main loop connection screws are tightened; Whether the power supply of the Hall element is normal, and whether the output current signal of the Hall element is correct; Check whether the acceleration time of the parameter setting is too short, whether the torque increase is too large, and whether the starting frequency is too high; Whether the motor or load machinery is stalled, and whether the insulation of the motor winding and output cable is damaged; Make sure that all units are working properly (remove the units to connect the copper bar, use a multimeter or oscilloscope to detect whether the unit input and output voltage and waveform are normal); whether the input supply voltage is too low; On the output side of the inverter, there is a power factor correction capacitor or a surge absorbing device, which may cause resonance with the inductor. Cancel the relevant device; The unit detects whether the board is short-circuited or damaged. If the fault persists despite the above reasons, replace the controller signal board or main control board. In some scenes, because of the influence of cogging effect and the like, the current fluctuation of the motor at low speed is very large, and the inverter may have current limiting at this time, so that the inverter appears to accelerate, limit the current and decelerate repeatedly, and can not accelerate normally or cause overcurrent protection, in this case, it is necessary to reduce the acceleration time, increase the current limiting coefficient, make the motor quickly pass through the fluctuation area, avoid overcurrent protection. (In this case, if the output voltage of a unit is low, replace the unit.)
16。 The output current of the motor overcurrent inverter is greater than 1.2 times of the rated current of the motor and lasts for more than 2 minutes. Check whether the rated current of the motor is set correctly for the parameter setting; whether the motor or load machinery is stalled; Whether the supply voltage is too low.
17。 The motor does not rotate after the inverter is running
Check whether there are contactors or switching equipment in the output of the inverter; Check whether the primary cable of the inverter output is connected to the motor; Observe whether the monitor has output current and output voltage, if there is voltage, no current means that the main circuit of the inverter to the motor is open, if there is voltage and current, then check whether the cable has a single-phase grounding situation, and whether the motor rotor winding is open.
18。 There are 5 types of unit heavy faults, including fuse faults, drive faults, unit overheating, unit overvoltage, and optical fiber faults, of which the first 3 faults can be bypassed (valid when the unit has a bypass function and the bypass stage is set to non-0).
19。 Fuse Failure When the unit is detected to be out of phase, a fuse fault is reported.
Please check whether it is caused by a power outage from the main power supply; whether the three-phase inlet of the unit is loose; Whether the incoming fuse is in good condition, if the fuse is open, please replace the unit.
20。 Driver failure
Check whether the voltage detection board of the unit is short-circuited, if the short-circuit will cause the A1, B1 and C1 units to report the drive fault; Whether L1 and L2 at the output end of the power unit are short-circuited, otherwise the IGBT of the unit is damaged, please replace the unit; whether the motor insulation is intact; Whether there is a mechanical fault in the load.
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