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During routine maintenance of the lithium battery cabinet, which of the following procedure is true about replacing a faulty battery module?
The correct sequence prioritizes electrical safety first, then mechanical disassembly. You must confirm the batteries are not discharging (Step 1) to avoid working under load. Next, the cabinet must be placed into a safe powered-down state by switching off the battery circuit breaker and long-pressing the POWER ON/OFF button to power off the cabinet (Step 6). Only after the cabinet is safely powered down should you open up the working area by removing the front covers of the faulty module and adjacent modules (Step 3). Then you turn off the ready switch on the battery management module (Step 2) to prevent the system from re-enabling the module unexpectedly during maintenance. After that, you loosen the securing bolts and pull out the battery management module about 10 cm (Step 5) to create operating space and ensure isolation for subsequent operations. With the cabinet safely stopped, you can remove the cables and copper bars connected to the faulty module (Step 7), and finally remove the baffle plate and pull out the faulty battery module (Step 4).