Replacing The Electrical Components; Safety Instructions; Replacing Dc Fuses - Sungrow SG3425UD System Manual

12 Routine Maintenance
Re-spray the protective paint every 5 years to the inverter surface.

12.6 Replacing the Electrical Components

The electrical components inside the inverter must be replaced by the same
components from the same manufacturer and of the same model.
The model can be found on the marking of the inverter or the component itself. If
otherwise, contact Sungrow.
If the components needs to be replaced with products from other manufacturers or
of different model on site, a prior analysis and confirmation by Sungrow is
required.
Failure to follow this procedure may lead to physical injury or death and void all
warranty from Sungrow.

12.6.1 Safety Instructions

Strictly observe the instructions in this chapter to replace the fuse.
Any personal injury or property damage caused by the disobedience of this
chapter may void pertinent warranty claims from Sungrow.
Only qualified technical persons who have fully understood the description in this
chapter can perform the operations in this chapter.

12.6.2 Replacing DC Fuses

DC Fuse Area
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.
Operations before Replacement
Follow the procedure below to replace the fault fuse.
step 1 Stop the inverter via the stop instruction on the LCD screen.
step 2 Turn the DC knob switch to the OFF position.
step 3 Disconnect DC output switches of all PV array combiner boxes upstream.
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System Manual