Finally; General - Fronius Symo 3.0-3-S Serviceanleitung

Finally...

General

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General Deficiencies identified that may be the cause of other hazards must be repaired
immediately, otherwise further use must be restricted until the defect is rectified.
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120
Isolate the inverter in its unloaded state from the AC grid and the DC power supply
(set DC disconnector to level 0).
Refit and attach all removed Datcom lines (restore inverter to original state prior to
the repair or safety inspection).
If necessary, reinstall the AC lead in the PG screw joint.
Check whether conductive objects are deposited in the housing.
Mount Datcom lid with 2 screws 5x25 TX25 – 2.5 Nm
Missing or damaged housing parts, insulating parts, or protective covers.
Soiling and blockage of cooling vents.
Check that safety labels are present (such as warning notices, grounding symbols,
rating plates) and replace, supplement, or correct if necessary.
Ensure that all safety-related labels or symbols, rated values and position indicators
are legible.