Under the national dual-carbon policy, photovoltaic power generation will play the main role in the future energy structure, and will also enter a new era of vigorous development. In 2021, the newly added capacity of distributed photovoltaic power plants exceeds that of centralized power pla

① Check whether the power cord and the positive and negative terminals are connected tightly, and whether there is any false connection or missing connection;② Except for the power cord and grounding wire, remove all the wires, power off the host and restart it to see if it recovers. If it doe

There are two types of main controller splash screens:2.1 —Communication splash screen2.2 —Powered splash screen

① First check the main controller baud rate, parity bit, address, etc., whether the settings are correct; ② Confirm whether the communication wire used is standard, 485 twisted pair shielded wire; ③ Confirm whether there is a virtual connection between the communication line and the host "A

① The branch shows a negative current. The negative current is greater than 2A, but when the ruler gauge has no negative current, it needs to be replaced;② No current is displayed on the branch circuit. The current meter measures the current and is greater than 1A, which needs to be replaced；③

Press the "SET" key to enter the Modbus parameter setting interface. The Modbus parameter setting is as follows:

Note: Operate in sequence, do not operate (2) first, then (1), otherwise an arc will occur （1）Disconnect ① circuit breaker; （2）Pull out all positive and negative fuses; （3）Multimeter measurement confirms that the voltage between modules PV + and PV- is 0v; （4）Display all the wiring marks

(1) The Main Controller Module has a black screen. When the multimeter measures a DC voltage between PV + and PV-> 400v, the Main Control Module needs to be replaced.(2) The data of the combiner box cannot be viewed in the background, and the settings (baud rate, parity, address) of the monitori

Composition of the combiner box