TYPE OF
FAULT
NAME
DESCRIPTION
RECOMMEND SOLUTION
Bus High Volt
Bus voltage is too high
and beyond the
protection range.
• Power off, then restart (Ref. Chapter6)
• If fault still occurs continuously and
frequently, please ask help for local
distributors.
Bus Unbalance
Bus voltage unbalanced,
beyond the protection
range.
DC Offset Fault
The DC component of
grid-connected current is
too high that beyond the
reasonable range.
System
Fault
Over Tempera-
ture
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.
The temperature of the
CPU is high that beyond
the protection range.
Auto Test Fail
Automatic test failed.
• Power off the inverter to check the AC
connection, then restart.
• If fault still occurs continuously and
frequently, please ask help for local
distributors.
No Utility
No continuous utility
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.
Self Lock
Inverter is locked at the
waiting interface.
Consistent
Fault
The detection results of
the two CPUs for the
same voltage and
frequency are different.
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.