
SVF-MN Series Frequency Inverter Operation Manual Chapter 7 Troubleshootin
157
Table 7-2 Common fault and handling methods
Phenomena
Possible reasons of fault
Actions
Drive's input supply is
inconsistent with the rated
voltage
Check with a
multi-meter and
troubleshoot the
issue.
3-phase rectifier bridge
blasted
Seek service
The drive
doesn’t
display after
power-on
The drive can not charge,
CHARGE is OFF.
Seek service
Between the inputs of the
supply have earth or shorted.
Troubleshoot the
issue
The MCCB
trips after
power-on
Rectifier breakdown, power
line and motor line connect
wrongly
Seek service
Check if damaged
or obstructed
The 3-phase outputs among
U, V, and W are unbalance.
Set the parameters
correctly According
to the nameplate
The motor is
standstill after
the drive
running
Don’t have output voltage
Seek service