25
7. Failure recovery
Probably problem
Probably reason
Solution
Indication light no
light on after input
control
power
supply
Power supply don’t
connect well
Check if the power supply
terminal
has
input
correct
working voltage
Check if the control power supply
is burned
Monitor
incorrect
value
Incorrect
voltage
value
Check if VN connect is OK
Check if the monitored voltage is
mismatch of the device rated
parameter
Incorrect
current
value
Check if the monitored current is
mismatch of the device rated
parameter
Incorrect
power
value
Check if set correct monitor
mode
Check if the phase sequene of
corresponding
voltage
and
current is correct or not
Check if the terminal of current is
correct