SMA America, LLC
Opening and closing
Installation Guide
SB20_25_30HFUS-eng-IUS113711
65
8 Opening and closing
8.1 Disconnect the Sunny Boy from Voltage Sources
1. Set the line circuit breaker on the AC side to position ”Off” and secure against reconnection.
2. If a multi-function relay is present, disconnect the multi-function relay power supply.
3. Turn the DC disconnect switch to position ”Off” and
wait 5 minutes, until the capacitors of the Sunny
Boy are discharged all LEDs are off.
DANGER
Electric shock due to improper opening of the SMA DC-Disconnect. Death resulting from
burning and electric shock.
• Observe the sequence described here when opening the Sunny Boy.
• If problems occur when performing the work described here, contact SMA.
