24 channels, but the upper left corner of the module shows 0. How to judge which Hall is faulty? The method is to insert the cable into each Hall separately, the correct one should display 4, the incorrect one will display 0, replace the Hall with 0.
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