Instruction manual

8. Fault Diagnosis
165
Flashing
Detected as
an alarm
only. Fault
contact out-
put is not ac-
tivated.
UL3 (Undertorque de-
tection)
When V/f mode is selected:
The Inverter’s output current
was less than the under-
torque detection level (n118).
When vector mode is select-
ed: The output current or out-
put torque was less than the
detection level (n097 or
n118).
Operation when undertorque
is detected will be determined
by the setting in n117.
• Check the setting in n118.
• Check the operating con-
ditions, and remove the
cause.
Flashing
BB (External baseblock)
BASEBLOCK command at
multi-function terminal is ON
and the Inverter output is
OFF (motor coasting). Condi-
tion is cleared when input
command is removed.
Check the following:
• NO/NC contact selection
(constant).
• Wiring is made properly.
• Signal is not input from
the PLC.
Flashing
EF (Simultaneous FWD/
REV RUN commands)
When FWD and REV RUN
commands are simultaneous-
ly input for over 500 ms, the
Inverter stops according to
constant n005.
Check the following:
• NO/NC contact selection
(constant).
• Wiring is made properly.
• Signal is not input from
the PLC.
Flashing
STP (Operator function
stop)
was pressed during
running via a control circuit
terminal FWD/REV com-
mand, or by a RUN command
from communications. The In-
verter stops according to con-
stant n005.
STP (Emergency stop)
Inverter received emergency
stop alarm signal. Inverter
stops according to constant
n005.
• Turn OFF FWD/REV
command of control cir-
cuit terminals.
Check the following:
• NO/NC contact selection
(constant).
• Wiring is made properly.
• Signal is not input from
the PLC.
Flashing
FAN (Cooling fan fault)
Cooling fan is locked.
Check the following:
• Cooling fan
• Cooling fan connection
• Adhesion of foreign mat-
ters does not interrupt the
rotation.
• Fan is mounted correctly.
• Relay connector is con-
nected properly after
replacement of the fan.
Alarm Display Inverter
Status
Description Causes and
Corrective Actions
Digital
Operator
RUN (Green)
ALARM (Red)
or