Troubleshooting - Huawei SUN2000-600W-P Quick Manual

If the system has change requirements, such as adding, deleting, and replacing an optimizer,
adjusting the physical position of an optimizer, or adjusting the PV string connected to the solar
inverter input, power off the inverter and wait for 5 minutes before performing the change
operation to avoid human injuries. After the change is performed, the optimizer search process
must be performed again and the physical layout diagram must be updated. Otherwise, the
networking is incomplete, optimizer faults cannot be located, or the system fails.
5

Troubleshooting

1. Open the FusionSolar app, log in to intl.fusionsolar.huawei.com using the installer account,
choose Me > Device Commissioning, and connect to the WLAN hotspot of the solar inverter.
2. Select installer and enter the login password. Click Log In. The device commissioning screen
is displayed.
3. Choose Device Monitoring, select the PV string and check the optimizer status.
Status Description
Green The optimizer is running properly.
The optimizer is offline. Check that the SN
Gray and location information are correct and
search for the device again.
Red The optimizer is faulty.
Fault Alarm Cause
Optimizer input
Input
overvoltage
overvoltage
occurred.
The optimizer
Overtemperature
internal
protection
temperature is
too high.
An internal fault
Internal
occurred in the
hardware fault
optimizer.
Optimizer
Output backfeed output backfeed
occurred.
The optimizer
Abnormal output
output voltage
voltage
is abnormal.
Suggestions
Check whether the open-circuit voltage of the PV module
connected to the optimizer exceeds 80 V.
1. Check the ventilation and ambient temperature at the
optimizer installation position. If the ventilation is poor or the
ambient temperature exceeds the upper threshold, improve
the ventilation and heat dissipation.
2. If the ventilation and ambient temperature are normal,
contact your dealer or Huawei technical support.
Contact your dealer or Huawei technical support.
1. Check whether PV modules are severely blocked when PV
strings are connected in parallel.
2. If the fault persists, contact your dealer or Huawei technical
support.
1. When the sunlight is normal, perform the optimizer search
function again.
2. Check whether the optimizer output extension cable is correct
(positive connector at one end and negative connector at the
other).
3. Check whether the PV string is correctly connected to the
inverter or whether there is a breakpoint in the PV string.
4. If the fault persists, contact your dealer or Huawei technical
support.
7
Optimizer status