72
Phenome
na
Conditions
Possible reasons of fault
Actions
The inverter stops
automatically
without STOP
command. The RUN
indicator is still on,
zero-frequency
running
Auto reset of fault
Check reason of fault and the
auto reset function
Simple PLC pause
Check PLC pause function
(terminal)
Interrupt signal feedback
from external devices
Check the configuration of
external interrupt and faulty
external devices
Reference frequency is 0
Check the reference frequency
Skip frequency
Check skip frequency
Positive logic, close loop
feedback>reference
frequency, Negative logic,
close loop
feedback<reference
frequency
Check the close loop setting
and feedback
Frequency adjustment is
set at 0
Check F9.05
Restart low voltage
compensation function
enabled, and low supply
voltage
Check the configuration of
restart and the input voltage
Inverter
does not
work
The inverter does
not work after
pressing “RUN”
key, and the
operating indicator is
distinguished.
Terminal of coast to stop is
valid
Check the terminal of coast to
stop
Terminal of prohibit
running is valid
Check this terminal
Terminal of external stop is
valid
Check this terminal
Fixed length stop
Check the setting of fixed
length or clear the actual length
The operation control
terminal is not closed
under 3-wire control mode
Reset and close this terminal
Faulty alarm
Clear the fault
Host virtual terminal set
incorrectly
Cancel this function or reset
F9.15
FWD/REV logic of input
terminal is incorrectly
Check the set of F9.15