SMA SC 500HE-US Maintenance Manual - Manual (Page 19)

SMA America, LLC 4 Maintenance
Maintenance Manual SC500HEUS-eng-WH-IUS120411 19
Fix any deficiencies discovered:
4.3 Maintenance under Dead Conditions
This section describes maintenance of the Sunny Central with no voltage present. All actions
described below may only be performed with the inverter disconnected.
4.3.1 Disconnecting the Inverter
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Electric shock from live voltage
High voltages are present in the inverter and its component parts. Failure to heed this safety
message can result in severe or lethal injuries due to electric shock.
• Disconnect the inverter before remedying the deficiencies discovered during the visual
inspection.
• After disconnecting the inverter, wait at least 10 minutes until the inverter's capacitors have
discharged completely.
• Wear personal protective equipment.
• Ensure that no voltage is present.
• Follow instructions precisely.
• Observe safety messages.
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Electric shock from live voltage
The component parts of the Sunny Central are energized. Touching component parts of the
Sunny Central can result in severe injuries or death.
• Before performing any work on the Sunny Central, disconnect the inverter and secure it
against being switched back on.
• After disconnecting the inverter, wait at least 10 minutes until the inverter's capacitors have
discharged completely.
• Ensure that no voltage is present.
Person authorized to operate the medium-voltage transformer
Only a duly authorized person trained in electrical safety can disconnect and connect the
AC voltage of the medium-voltage transformer.