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9 Routine Maintenance
Due to the effect of ambient temperature, humidity, dust and vibration, the inner
components of the inverter will be aging and worn out. To ensure the system safety and
maintain the efficiency of the inverter, it is necessary to carry out routine and periodic
maintenance.
All measures, which can help the in inverter be in good working conditions, are within the
maintenance scope.
9.1 Safety Instructions
9.1.1 Safety Rules
Only qualified personnel can perform the work described in this chapter.
Do not leave any screws, washers or other metallic parts inside the inverter to
avoid damages to the inverter.
After disconnecting the AC/DC main switch, the cable connection terminals inside
the AD/DC cabinet may contain high voltage. To avoid the risk of electric shock
before opening the cabinet door,
Disconnect the AC/DC main switch;
Disconnect the upstream and downstream switch of the inverter.
Wait at least 5 minutes after inverter stops before any work on the inverter.
9.1.2 Five Safety Rules
Respect the following five rules during maintenance or service on the inverter to ensure the
safety of the maintainer.
Disconnect the inverter from all the external connections and internal power supplies.
Ensure that the inverter will not be started accidentally.
Verify that the inverter interior is discharged completely with a multimeter.
Necessary ground and short circuit connect.
Cover the adjacent electrical components with insulation cloth during operation.
9.2 Maintenance and Interval
Recommended routine maintenance work and maintenance interval are shown in the
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