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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.

Cause analysis:
BAE is the brake control signal and the feedback signal are inconsistent;
CONE is the running contactor control signal and the feedback signal are inconsistent.

When the elevator brake and running contactor are controlled by the output relay of GD300L, and if the digital input terminal is equipped with the brake feedback signal (function code 18) and the running contactor feedback signal (function code 17), and the terminal signal is not received during operation, the GD300L will trip at BAE and CONE and stop running.

Solution:
1. Check terminal wiring and terminal function code to ensure that the actual signal matches the function setting;
2. Check whether the terminal polarity setting matches the actual signal NO/NC status
3. Check whether the feedback contact of the brake and the running contactor is reliable
4. Check whether there is strong current interference source around and eliminate interference

Select battery model and operation mode.

The standard warranty period of MG/BG series is five years, and the warranty period can be extended to 10 years for a fee. Please contact INVT for specific costs.

The overall efficiency of GD5000 is ≥96% (standard), and non-standard designs, and can be non - standard design higher efficiency.

For VFD below 660V, we recommend that customers choose low-voltage general cabinets. 1140V and 3300V products can provide IP20 standard cabinets.