YASKAWA VS-606V7 Series Instruction Manual page 136

Alarm Display
Digital RUN (Green)
Operator ALARM (Red)
OP?
Blinking
OL3
Blinking
SE
Blinking
UL3
136
Inverter
Explanation
Status
OP? (Constant setting
error when the constant
setting is performed
through the MEMOBUS
communications)
OP1: Two or more values
are set for multi-
function input
selection.
(constants n050 to
n056)
OP2: Relationship among
V / f constants is not
correct.
(constants n011,
n013, n014, n016)
OP3: Setting value of
motor rated current
exceeds 150% of
inverter rated current.
(constant n036)
Warning
OP4: Upper / lower limit
of frequency
Fault
reference is reversed.
contacts
(constants n033,
do not
n034)
change
OP5: (constants n083 to
state.
n085)
OL 3 (Overtorque
detection)
Motor current exceeded
the preset value in
constant n098.
SER (Sequence error)
Inverter receives
LOCAL / REMOTE select
command or
communication / control
circuit terminal changing
signals from the multi-
function terminal while the
inverter is outputting.
UL3 (Undertorque detection)
When V/f mode is selected:
The inverter's output current
was less than the undertorque
No fault
detection level (n118).
output.
When vector mode is selected:
Automatic
The output current or output
reset after
torque was less than the
cause
detection level (n097 or n118).
removed.
Operation when undertorque
is detected will be determined
by the setting in n117.
Causes and
Corrective Actions
Check the setting values.
Reduce the load, and
expand the accel / decel
time.
Check the external circuit
(sequence).
• Check the setting in n118.
• Check the operating
conditions, and remove
the cause.