101
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DC
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The DC cabinet inside the inverter is equipped with DC fuses.
Before replacing the fuses, remove protective grid installed at the DC fuse area at the
bottom of the DC cabinet.
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Follow the procedure below to replace the fault fuse.
step 1
Stop the inverter via the stop instruction on the LCD screen.
step 2
Disconnect DC output switches of all PV array combiner boxes upstream.
step 3
Disconnect the DC load break switch, disconnect AC and DC maintenance switch, and
perform Step 4 about 20 minutes later when the capacitor inside the machine
discharges completely.
step 4
Use a multimeter with a measuring range of 1500Vdc to check whether voltages of the
connection terminal on the DC side of the inverter are zeros, where the voltages include
the voltage between the positive and negative poles, the positive to ground voltage, and
the negative to ground voltage.
step 5
Open the door with the key and remove the protective grid in the DC fuses area.
step 6
Measure each DC input voltage by using the multimeter, and perform the next step after
ensuring the wiring terminal is completely voltage-free.
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System Manual
