DC Fault
Type of Fault
Name
Description
Recommend Solution
DC Offset Fault
The DC component of
grid-connected current is
too high that beyond the
reasonable range.
Bus Unbalance
Bus voltage unbalanced,
beyond the protection
range.
Bus High Volt
Bus voltage is too high
and beyond the
protection range.
Bus Low Fault
When inverter is running,
bus voltage is lower than
the normal value beyond
the protection range.
• Power off, then restart (Ref. Chapter6)
• If fault still occurs continuously and
frequently, please ask help for local
distributors.
Auto Test Fail
Automatic test failed.
No Utility
No continuous utility
• Power off the inverter to check the AC
connection, then restart.
• If fault still occurs continuously and
frequently, please ask help for local
distributors.
System Fault
The temperature of the
CPU is high that beyond
the protection range.
Over Temperature
The temperature of the
installation environment
is too high or too low,
beyond the reasonable
range.
The temperature of the
cooling device is high or
low thet beyond the
protection range.
• Improve or change the installation
environment to adjust the inverter
installation environment temperature to
normal range.
• Power off, then restart (Ref. Chapter6)
• If fault still occurs continuously and
frequently, please ask help for local
distributors.
Device Fault
Grounding is abnormal
or the ground wire is
disconnected.
• Check whether the ground wire of the
inverter is properly connected and the
ground impedance is too high, if it is,
make corrections
.
• Power off, then restart (Ref. Chapter6)
• If fault still occurs continuously and
frequently, please ask help for local
distributors.distributors.
Consistent Fault
The detection results of
the two CPUs for the
same voltage and
frequency are different.
Self Lock
Inverter is locked at the
waiting interface.
Grid Volt AD
Grid voltage AD value
deviation is too high,
beyond the protection
range.
• Power off, then restart (Ref. Chapter6)
• If fault still occurs continuously and
frequently, please ask help for local
distributors.
Maintenance&Trouble Shooting
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