User Manual 9 Troubleshooting and Maintenance
75
1. Disconnect the DC inputs and check
whether DC cables are damaged, whether
the wiring terminals or fuses are loose or in
poor contact, and whether component parts
are burnt. If so, take corresponding corrective
measures.
2. After taking corresponding measures in
step 1, reconnect the DC inputs. Remove the
arc fault through the APP or LCD screen so
that the inverter will recover to be normal.
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Electric arc
detection disabled
1. Enable the AFD function through the APP
or the LCD screen so that the inverter will
recover to be normal.
2. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Protection
self-check failure
on grid side
Restart the inverter or clear the fault through
the App.
If the fault still exists, contact Sungrow
Service.
1. Check whether the AC cable is correctly
connected.
2. Check whether the insulation between the
ground cable and the live wire is normal.
3. If the fault is not caused by the foregoing
reasons and still exists, contact Sungrow
Service.
Wait for the inverter to return to normal.
Disconnect the AC and DC switches, and
reconnect the AC and DC switches 15
minutes later to restart the inverter.
If the fault still exists, contact Sungrow
Service.
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