Sungrow SG250K3, Operation Manual, Page: 12 / 66

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1.1. Service Safety
Never work alone when servicing this equipment. Two persons are
required until the inverter is properly shut down, and verified de-
energized with a meter.
1.2. Open the Door of SG250K3
Use the following procedure to shut down the SG250K3 Inverter before servicing:
1. Stop the inverter from the touch screen control menu.
2. Switch off the DC breaker (turn the switch to the “off” position) and press in
the 2 handles (near the DC breaker) to make it pop out from the lock hole at both
side doors, turn it right. Open the left door.
3. Switch off the AC breaker (turn the switch to the “off” position) and press in
the handle (near the AC breaker) to make it pop out from the lock hole and open
the right door.
Warning
:
Shock Hazard
The terminals of the SG250K3 PV input may have energy when the PV
arrays are energized.
After shut down, wait a minimum 5 minutes should be left for all
capacitors of SG250K3 to discharge and left with no potential
10 minutes