60
09 Maintenance
User Manual
V1.0-2023-10-30
9�4 Troubleshooting
Perform troubleshooting according to the following methods. Contact the after-sales service if these
methods do not work.
Collect the information below before contacting the after-sales service, so that the problems can be
solved quickly.
1. Inverter information like serial number, software version, installation date, fault time, fault frequency,
etc.
2. Installation environment, including weather conditions, whether the PV modules are sheltered or
shadowed, etc. It is recommended to provide some photos and videos to assist in analyzing the
problem.
3. Utility grid situation.
No�
Fault
Cause
Solutions
1
Utility Loss
1. Utility grid power
fails.
2. The AC cable is
disconnected, or the
AC breaker is off.
1. The alarm is automatically cleared after the
grid power supply is restored.
2.
Check whether the AC cable is connected and
the AC breaker is on.
2
Grid Overvoltage
The grid voltage
exceeds the
permissible range,
or the duration of
high voltage exceeds
the requirement of
HVRT.
1. If the problem occurs occasionally, the
utility grid may be abnormal temporarily.
The inverter will recover automatically after
detecting that the utility grid is normal.
2. If the problem occurs frequently, check
whether the grid voltage is within the
permissible range.
• Contact the local power company if the
grid voltage exceeds the permissible
range.
•
Modify the overvoltage protection
threshold, HVRT or disable the
overvoltage protection function after
obtaining the consent of the local power
company if the grid frequency is within the
permissible range.
3.
Check whether the AC breaker and the output
cables are connected securely and correctly if
the problem persists.
Single Inverter
