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1. Model: If the suffix is-L-06, select GD5000-06; if the suffix is-L-07, select GD5000-07; if the suffix is-S/-D, select GD5000-00. 
2. Version Select a large version of MCU, old and new only configuration table is different, the same function 
3. When UPD is selected for communication, the address is 192.168.1.2 (default address of main control board) 
4. When COM is selected for communication, USB to RS485 serial port is required to connect to the system IO board. 
5. Other defaults 
6. The local Ethernet address of the computer needs to be manually set to IPV4 is 192.168.1.X (X≠2)

When the system can be temporarily shut down according to production process requirements, a manual bypass cabinet is used, allowing operators to switch between variable-frequency and line-frequency operation. When the system cannot be shut down according to production process requirements, an automatic bypass cabinet is used, with the switching process performed automatically. Both manual and automatic bypass cabinets have the same dimensions: 1000 × 1200 × 2350 (width × depth × height, in millimeters).

What is the maximum supported power of the 24V DC output in the 4KW GD20 inverter? Will it cause any issues if several 48mA small relays are driven?
A: 1. Firstly, it is not recommended to forcibly use the built-in power supply driver of the inverter. If you want to use the built-in 24V power supply for load driving, the first step is to consult the product specification / manual of the corresponding inverter to confirm the maximum output current of the 24V auxiliary power supply.
2. Taking a maximum output current of 200mA as an example. Corresponding to a rated power of 4.8W, a small relay with 48mA can drive 4. Considering line voltage drop, surge current and safety redundancy, calculate the long-term safe current as 70% of the rated current (i.e. 140mA). For this inverter, the recommended number of relays driven by 48mA is no more than 3 to avoid overloading and damage to the 24V built-in power supply.
3. If the load demand exceeds the power capacity of the 24V power supply specified in the specification, it is recommended to connect an independent switching power supply externally.

Possible causes:
1.Aged input contactor or poor contact
2.Damaged rectifier bridge or capacitors inside the VFD
3.Abnormal DC bus voltage detection circuit
Troubleshooting steps:
1.Confirm that input voltage remains stable, especially during start or loading
2.Check the input contactor, circuit breaker, and fuse for good contact
3.Measure the output of the rectifier bridge for normal operation
4.If rectifier is normal, check if the DC bus capacitors are aged
5.Test by replacing the control board or voltage detection board

During installation or application, the time setting of the UPS with a color screen display is found to be abnormal. The time resets after a UPS restart, or the historical time display is abnormal.
A: 
1. If the time setting on the display screen fails, please check if a button battery is installed on the back of the display screen; or check if the battery has power and try replacing it.
2. If the historical data or time-related functions in the MTR are abnormal, for RMX UPS units, check the button battery on the monitoring board; for HTX33 units, check the button battery on the monitoring interface board. Check if the button battery is installed or replace it.
3. If replacing the button battery does not solve the above problems, the corresponding monitoring board or monitoring interface board needs to be replaced.

1. After shutting down, check whether the fiber plugs on the fiber optic board are loose, and observe whether the fiber head is bright and functioning properly
2. Unplug the fiber and reconnect it to see if the fault is resolved
3. Replace the fiber optic and remove the internal fiber optic card of the unit or the corresponding fiber optic card on the fiber driver board

1.Check the connection circuits of the emergency switch to the sunroof and the front and rear doors. Verify whether the sunroof and the front and rear doors are connected in series and are connected to the control module.
2.Check whether the signal voltage of the roof window circuit and the front and rear door control circuits on the measurement control module is normal (around 12V).
3.If the signal voltage of the skylight circuit is normal but there is still no response, it indicates that the skylight is locked by screws. Remove the screws and it can be used normally.
4.Connect the access control input in the controller above the sliding door and the GND to the ports of control module 70/71.

The actual output voltage is 380V. This is because the voltage generated by the VFD is a PWM-modulated waveform with high-frequency components. To accurately measure the RMS value, a multimeter equipped with an LPF (low-pass filter) function should be used. Our multimeter shows the same reading as the customer's when LPF is disabled. However, once LPF is enabled, the measured output voltage decreases slightly.

If the MVD input voltage is lower than the line voltage and a Grid undervoltage fault occurs, adjust the transformer tap to the -5% position. If the input voltage is too high causing an overvoltage fault in the MVD, adjust the transformer tap to the +5% position.