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As the single-phase motor contains the starting capacitor, the start-up capacitor is designed to generate a 90-degree phase difference between the primary and secondary windings of the single-phase motor, resulting in a rotating magnetic field to rotate the motor. The size of the starting capacitor is generally designed according to the frequency 50Hz, but when the single-phase motor frequency control, the frequency will not always work at 50Hz, it is difficult to produce rotating magnetic field, the common method is to remove the single-phase motor start and run Capacitor, the use of two-phase control method.

After adopt the method of removing the capacitor, the software algorithm improvements, it is necessary to ensure that limit the starting current, but also to ensure that the starting torque, so the final output voltage than the direct start voltage amplitude is low, resulting in load capacity decreased.

It mainly has two type of brake type which are permanent magnetic brake and eletro-magnetic brake. For permanent magnetic brake, the heating is small, accuracy is high, no noise but it's expensive; For electro-magnetic brake, the heating is big, accuracy is low, it has noise but it's cheap.

The screen is locked tightly, please try to loose the installation screw and power on again.

There is not factory password for it and can only format PLC.

The extension modules of IVC1L can be used in IVC1, just the height of IVC1L extension modules is about 1cm higher than the ones of IVC1. The extension modules of IVC2 is same with IVC3. IVC2L has isolated extension modules, cannot be used in other series PLC.

It can provide variable frequency control and power frequency control. Variable frequency control requires a corresponding power VFD to control the cooling fan; power frequency control uses the GD300-1A relay output to control the start and stop of the fan. The start and stop temperature of the fan can be set on the HMI.

The overload capacity of the GD300-21 main motor is 150% for 1 minute and 120% can run continuously. The fan motor overload capacity is 120% for 1 minute.

The signal of the smoke sensor is connected to the inverter. When a fire occurs, the inverter detects that the signal of the smoke sensor is valid. According to the set fire mode, it can run until the set frequency to extract smoke until the inverter is damaged.

There is a fuse on the 24 V auxiliary power board, this board will provide power for fan and soft-start contactor. If the fuse damaged, the 24V auxiliary power board will not output 24V power supply, in this case, contactor isn't close, the drive still trying to start with the resistor in the circuit, there  will have a big current through resistor. But in most cases, it will not burn up, because our VFD has protection for that. I will explain more: when the power goes into VFD through soft-start resistor replace of contator, the resistor will act as an Partial voltage resistance in the whole voltage range, for example, from DC 540V goes down to 350V, our VFD will report "UV" under-voltage fault, to protect the soft-start circuit. In very few cases, the VFD don't have time to protect while during voltage from DC 540V goes down to 350V.

Sometimes, the resistance shell is cracked due to heating, its inside resistor may not be broken, I supposed that. You can use a multi-meter to test the resistor value is 20Ω or not.