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Appendix 3 Warning code list
Warning code
Code
Screen Display
Cause
Troubleshooting
Current stall
PU
MON
RUN
Hz
V
EXT
A
flicker
When the output current is
larger than Stall prevention
operation level, the three lights
on the left side of the screen
flicker,
indicating
that
the
inverter is in current stall mode.
In this case the motor may not
run smoothly.
1.
Check if the values of
P.22, P.23, and P.66
are proper.
2.
Check if the values of
P.7 and P.8 are too
small.
Voltage stall
PU
MON
RUN
Hz
V
EXT
A
flicker
When the voltage between P
and N is too high, the three
lights on the right side of the
screen flicker, indicating that
the inverter is in voltage stall
mode. Then the motor may not
run smoothly.
1.
Add a brake resistor
between P and PR.
2.
Check if the values of
P.7 and P.8 are too
small
LV
Low voltage
Input voltage is low.
Supply with the normal
voltage
LT motion
PU
MON
RUN
Hz
V
EXT
A
flicker
When the output current is more
than twice the rated current, but
it doesn’t reach the stall level,
all the six lights on both side of
the screen flicker, indicating
that the inverter is in LT mode.
Then the motor may not run
smoothly.
1.
Please increase the
acceleration/decelerati
on time in case of
abrupt
acceleration/decelera-t
ion.
2.
Avoid
abrupt
load
increasing.
3.
Check whether there is
short circuit among
U/T1,V/T2 and W/T3.
Note: The above phenomenon is to show the working state of the inverter, and the inverter will not stop. To get
around the above troubles, please adjust the parameters properly or check the power supply and load
carefully.
