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11 Routine Maintenance
11.1 Safety Instructions
Risk of inverter damage or personal injury due to incorrect service!
•
Disconnect the switches between the product and all power supplies before
maintenance.
•
After the inverter is powered off for 5 minutes, measure the voltage and current
with measuring equipment. Only when there is no voltage nor current can oper-
ators who wear protective equipment operate and maintain the inverter.
The devices inside the inverter carry high voltage. Touching these devices may
lead to fatal electric shock.
Therefore,
•
Live line measurement can only be performed by professional personnel who
know the PV system well. Before measurement, be sure to take proper protec-
tion methods (e.g., wear insulating gloves, etc.).
•
During live line measurement, the operator must be accompanied by others to
ensure personal safety.
Electric shock or fire may occur due to device damage or system fault.
•
Visually inspect for device damages or other hazards before the operation
•
Check whether other external devices or circuit connections are in a safe state.
•
Make sure the device is in a safe state before operating.
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