SMA SC 500CP-10-JP Maintenance Manual - Manual (Page 9)

SMA Solar Technology AG 2 Safety
Maintenance Manual SCCP-JP-WA-A4-en-12 9
Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides
The precharge unit of the option "Q at Night" is live even if the AC contactor and the DC switch are open.
Touching live components of this assembly will result in death or serious injury.
• Do not touch any live components.
• Switch off the inverter.
• After switching off the inverter, wait at least 15 minutes before opening it until the inverter capacitors have
discharged completely.
• Before performing any work on the inverter, disconnect it and secure against reconnection.
• Ensure that no voltage is present.
• Do not remove protective covers.
• Observe the warning messages.
• Wear personal protective equipment.
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Danger to life from electric shock when entering the PV field
The insulation monitoring with GFDI, Remote GFDI and Soft Grounding does not provide protection from injury when
GFDI is activated. PV modules which are grounded with GFDI discharge voltage to ground. Entering the PV field can
result in lethal electric shocks.
• The inverter must be installed in a closed operating area.
• Before entering the PV field, switch the PV array to insulated operation.
• Ensure that the insulation resistance of the PV field is greater than 1 k Ω .
Danger to life due to blocked escape routes
In hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two
Sunny Central inverters located opposite each other blocks the escape route. It is imperative that the escape route is
freely accessible at all times.
• An escape route of at least 500 mm width must be available at all times. Make sure the minimum passage width
of the escape route meets local standards.
• Do not place any objects in the escape route area.
• Remove all tripping hazards from escape routes.
• If two Sunny Central inverters have been installed facing each other, never open the doors of both inverters
simultaneously.
Risk of fire due to failure to observe torque specifications on live bolted connections
Failure to follow the specified torques reduces the ampacity of live bolted connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
• Ensure that live bolted connections are always tightened with the exact torque specified in this document.
• When working on the device, use suitable tools only.
• Avoid repeated tightening of live bolted connections as this may result in unacceptably high torques.
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