51
reliable.
If this fault occurs often, contact the service.
40
•Check whether the airflow to the heat sink is
obstructed.
•Check whether the ambient temperature around the
inverter is too high.
41, 42
43, 44
45 47
• Disconnect the inverter from the grid and the PV array
and reconnect after 3 minutes.
If this fault is still being shown, contact the service.
61 62
Check the DRED device communication or operation
65
•Check if the ground line is connected with the inverter ;
• Make sure the grounding connection of the inverter is
connected and reliable.
If this fault occurs often, contact the service.
Permanent
Fault
1, 2,3,
4,5,6,
8,9
• Disconnect the inverter from the utility grid and the PV
array and reconnect it after LCD and LED turn off. If this
fault is still being displayed, contact the service.
Contact the service if you meet other problems not in the table.
11 Maintenance
Normally, the inverter needs no maintenance or calibration. Regularly inspect the
inverter and the cables for visible damage. Disconnect the inverter from all power
sources before cleaning. Clean the enclosure with a soft cloth. Ensure the heat sink at
the rear of the inverter is not covered.
11.1 Cleaning the contacts of the DC switch
Clean the contacts of the DC switch annually. Perform cleaning by cycling the switch
to on and off positions 5 times. The DC switch is located at the lower left of the
enclosure.
11.2 Cleaning the heat sink
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