5-4
LED display
Description
Cause
Possible solutions
CL
Inverter over
current:
Wait 1 minute to
reset .If it occurs CL
or OL2 up to 4
successive times
then wait 5 minutes
to reset
Inverter over current warning: Inverter current
reached over current protection level.
Check motor load and operating
time..
LV
Low voltage
during operation
Voltage too low
during operation
Power voltage too low
Power voltage varies widely (fluctuates)
1.Improve power quality
2.Consider adding a reactor at the
power input side
OVSP
motor rotation over
speed
Actual rotation speed is different from set
speed.
Check V/f curve.
Check motor rated current
Check and reduce motor load,
check and operation duty cycle.
OH4
motor over heat
error
If temperature detected increases above the
set limit in parameter 08-13 and for the delay
time set in parameter 08-12 then the display
will show “OH4” (motor over heat detection),
and the motor will coast to stop.
Motor over heat detection “OH4” can be reset
when the temperature detection level is lower
than the set level in parameter
【
08-14 PTC
reset level
】
.
Improve ventilation
Adjust parameter 08-15