Huawei SDongleA-01 User Manual page 71

FusionSolar Smart PV Management System
Connection
User Manual (Inverters + SDongleA)
6.6 Troubleshooting Common Issues
Table 6-7 Common faults and troubleshooting measures
Fault
Huawei FusionSolar
Smart PV
Management
System shows that
the communication
with the inverter is
interrupted.
The SN of the Smart
Dongle cannot be
identified by the
FusionSolar app.
The devices
connected to the
Smart Dongle are
not connected to the
Huawei FusionSolar
Smart PV
Management
System properly.
Issue 02 (2021-11-25)
Cause
1. The RS485 cables among inverters
are loose or disconnected.
2. The PV string is not properly
connected, and the inverter has
no DC input.
3. The baud rate or RS485 address
of the inverter is changed.
4. An inverter is replaced.
5. The inverter has been removed.
6. The Smart Dongle is faulty.
The bar code is damaged and cannot
be scanned.
1. Check whether the inverter
software version meets the
requirements. If not, upgrade the
inverter to a specified version or
later.
2. Check that the RS485
communications cables are
connected properly.
3. Check that the RS485
communications parameters of
the inverter are set correctly.
4. Check that the inverter
communications parameters are
correctly set.
Copyright © Huawei Technologies Co., Ltd.
Troubleshooting
1. Check that the RS485 cables
among inverters are properly
connected and tightened.
2. Check that the inverter is
correctly connected and power
on the inverter.
3. Check that the baud rate and
RS485 address of the inverter
are set correctly.
4. Check whether any inverter has
been replaced. If yes, search for
the new inverter on the
management system.
5. If an inverter has been
removed, search for inverters
again on the management
system.
6. Replace the Smart Dongle.
Manually enter the SN on the Add
Device screen on the FusionSolar
app.
If the inverters cannot be detected
after troubleshooting, the Smart
Dongle is faulty. Contact Huawei
technical support.
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