SMA STRING-COMBINER DC-CMB-U15-16 Installation Manual page 8

2 Safety
Danger to life from electric shock if the Combiner Box is left unlocked
If the Combiner Box is unlocked, unauthorized persons will have access to components carrying lethal voltages.
Touching live components can result in death or serious injury due to electric shock.
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Always lock the Combiner Box.
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Remove the keys from the door locks.
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Keep the keys in a safe place.
Risk of fire due to failure to observe torque specifications on live bolted connections
Failure to follow the specified torques reduces the capacity of live bolted connections so that the contact resistances
increase. This can cause components to overheat and catch fire.
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Ensure that live bolted connections are always tightened with the exact torque specified in this document.
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When working on the device, use suitable tools only.
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Avoid repeated tightening of live bolted connections, as this may result in inadmissibly high torques.
Risk of burns due to hot components or devices
Some components of the Combiner Box can get very hot during operation. Touching these components can cause
burns.
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Observe the warnings on the components.
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During operation, do not touch any components or devices marked with such warnings.
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After disconnecting the PV system from voltage sources, wait until all hot components have cooled down sufficiently.
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Wear suitable personal protective equipment for all work on the device.
8 DC-CMB-IA-U15-xx-en
SMA Solar Technology AG
Installation Manual