Fronius Symo 3 Installation Seite 4

Safety EN
WARNING! Incorrect operation or shoddy workmanship can cause serious injury or damage. Commissioning of the
inverter may only be carried out by trained personnel in accordance with the technical regulations. You should read
the safety rules before commissioning the equipment or carrying out maintenance work.
WARNING! An electric shock can be fatal. Danger due to grid voltage and DC voltage from solar modules that are
exposed to light.
- Make sure that both the AC side and the DC side of the inverter are de-energised before carrying out any
connection work.
- Only an authorised electrical engineer is permitted to connect this equipment to the public grid.
WARNING! An electric shock can be fatal. Danger due to grid voltage and DC voltage from solar modules.
- The DC main switch is only to be used to de-energise the power stage set. The connection area is still live when
the DC main switch is switched off.
- Ensure that the power stage set and connection area are disconnected from one another before carrying out
any maintenance or service tasks.
- The power stage set, which is enclosed in a separate housing, must only be disconnected from the connection
area when in a de-energized state.
- Maintenance and servicing in the power stage set of the inverter must only be carried out by Fronius-trained
service technicians.
WARNING! An electric shock can be fatal. Danger from residual voltage in capacitors.
Wait for the capacitors to discharge. The discharge time is 5 minutes.
WARNING! An inadequate ground conductor connection can cause serious injury or damage. The housing screws
provide a suitable ground conductor connection for grounding the housing and must NOT be replaced by any other
screws that do not provide a reliable ground conductor connection.
CAUTION! Risk of damage to the inverter from dirt or water on the terminals and contacts of the connection area.
- When drilling, ensure that terminals and contacts in the connection area do not become dirty or wet.
- The wall bracket without a power stage set does not conform to the protection class of the inverter as a whole,
and therefore must not be installed without the power stage set.
The wall bracket should be protected from dirt and moisture during installation.
CAUTION! Risk of damage to the inverter as the result of incorrectly tightened terminals. Incorrectly tightened ter-
minals can cause heat damage to the inverter that may result in a fire. When connecting AC and DC cables, ensure
that all the terminals are tightened to the specified torque.
CAUTION! Risk of damage to inverter from overload.
- The maximum amperage when connecting to a single DC terminal is 32 A.
- Connect the DC+ and DC- cables to the DC+ and DC- terminals on the inverter, taking care to ensure that the
polarity is correct.
- The maximum DC input voltage must not exceed 1000 V DC.
NOTE! Degree of protection IP 65 is only applicable if the inverter is permanently attached to the wall bracket with
screws.
Degree of protection IP 20 applies to the wall bracket with no inverter.
NOTE! The solar modules connected to the inverter must comply with the IEC 61730 Class A standard.
NOTE! When photovoltaic modules are exposed to light they supply current to the inverter.
IMPORTANT! Please refer to the leaflet "Installation and commissioning information sheet" (42,0410,1962).
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