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11 Maintenance
Installation and Operation Manual for Inverter RPI M50A_12s V1 EU EN 2017-03-09
138
11.3 Replacing/cleaning the fans
DANGER
Electrical shock
Potentially lethal voltage is still present on the in-
ner electrical components of the inverter after the
AC/DC disconnector has been opened.
1. Turn the AC/DC disconnector to the
OFF
position.
2. Disconnect the inverter from all AC and DC
voltage sources and make sure that none
of the connections can be accidentally
restored.
3. Wait for at least 10 seconds until the internal
capacitors have discharged.
NOTICE
After unscrewing the fan block, the entire weight
of the fan block hangs on the fan power supply
cables.
► You should therefore hold the fan block with
one hand when unscrewing.
NOTICE
Do not use any sharp, pointed or hard objects for
cleaning.
Do not use liquids for cleaning.
1. Turn the AC/DC disconnector to the
OFF
position.
2. Disconnect the connection between the inverter and the
solar modules (DC).
3. Disconnect the connection between the inverter and the
grid (AC).
4. Use a voltmeter to check that the AC and DC connections
are free of voltage.