2 Safety
WARNING
Danger to life due to fire and
deflagration
In rare cases, an explosive gas mixture can be
generated inside the product under fault
conditions. In this state, switching operations can
cause a fire and, in very rare cases, a deflagration
inside the product. Death or lethal injuries due to
the spread of a fire can result.
• In the event of a fault, do not perform any
direct actions on the product.
• In the event of a fault, ensure that
unauthorized persons have no access to the
product.
• In case of failure, disconnect the PV module
via an external disconnection device. If there
is no disconnection device present, wait until
no more DC power is applied to the inverter.
• In the event of a fault, disconnect the AC
circuit breaker, or keep it disconnected in
case it has already tripped, and secure it
against reconnection.
WARNING
Risk of injury due to toxic substances,
gases and dusts
In rare cases, damages to electronic components
can result in the formation of toxic substances,
gases or dusts inside the product. Touching toxic
substances and inhaling toxic gases and dusts can
cause skin irritation, burns or poisoning, trouble
breathing and nausea.
• Only perform work on the product (e.g.,
troubleshooting, repair work) when wearing
personal protective equipment for handling
of hazardous substances (e.g., safety gloves,
eye and face protection, respiratory
protection).
• Ensure that unauthorized persons have no
access to the product.
WARNING
Danger to life due to electric shock from
destruction of the measuring device due
to overvoltage
Overvoltage can damage a measuring device and
result in voltage being present in the enclosure of
the measuring device. Touching the live enclosure
of the measuring device results in death or lethal
injuries due to electric shock.
• Only use measuring devices with a DC input
voltage range of 1000 V or higher.
6
STPxx-50-IS-xx-12
SMA Solar Technology AG
CAUTION
Risk of burns due to hot enclosure parts
The enclosure and the enclosure lid may get hot
during operation. The DC load-break switch can
not become hot.
• Do not touch hot surfaces.
• Wait until the inverter has cooled down
before touching the enclosure or enclosure
lid.
CAUTION
Risk of injury due to weight of product
Injuries may result if the product is lifted incorrectly
or dropped while being transported or mounted.
• Transport and lift the product carefully. Take
the weight of the product into account.
• Use the carrying handles or hoist when
transporting the product. To attach the hoist
system, eye bolts must be screwed into the
threads provided, which are located on the
right and left of the product's mounting lugs.
• Wear suitable personal protective equipment
for all work on the product.
NOTICE
Damage to the enclosure seal in
subfreezing conditions
If you open the product when temperatures are
below freezing, the enclosure seals can be
damaged. Moisture can penetrate the product and
damage it.
• Only open the product if the ambient
temperature is not below -5°C.
• If a layer of ice has formed on the enclosure
seal when temperatures are below freezing,
remove it prior to opening the product (e.g.
by melting the ice with warm air).
NOTICE
Damage to the product due to sand,
dust and moisture ingress
Sand, dust and moisture penetration can damage
the product and impair its functionality.
• Only open the product if the humidity is
within the thresholds and the environment is
free of sand and dust.
• Do not open the product during a dust storm
or precipitation.
• Close tightly all enclosure openings.
Quick Reference Guide