YASKAWA V7 Technical Manual page 113

Table 6-1. Alarm Displays and Corrective Actions - Continued
Alarm Display
Digital RUN (Green)
Operator ALARM (Red)
Blinking
Blinking
or
Blinking
Blinking
Blinking
Drive
Explanation
Status
BB (External baseblock)
Baseblock command at
multi-function terminal is
active, the drive output
is shut OFF (motor coasting).
Temporary condition is
cleared when input command
is removed.
EF (Simultaneous FWD/
REV run commands)
When FWD and REV
run commands are
simultaneously input
for over 500ms, the
drive stops according
to parameter n005.
Warning
only. STP (Operator function
Fault stop) is pressed during
contacts running by the control circuit
do not terminals FWD / REV
change command.
state. The drive stops according
to parameter n005.
STP (Emergency stop)
Drive receives emergency
stop alarm signal.
Drive stops according
to parameter n005.
FBL (PID feedback loss
detection)
PID feedback value drops
below the detection level.
When PID feedback loss is
detected, the Drive operates
according to the n136 setting.
Protective When under torque is
operation. detected, drive performs
Output is operation according to the
shut OFF preset setting of constant
and motor n117.
coasts to
a stop.
Warning. UL3 (Under torque detection)
Fault
contacts do
not change
state. V/f mode: Drive output
current fell below the preset
value in parameter n118.
Vector mode: Motor current
or torque fell below the
preset value in parameter
n097 and n118.
6-3
Causes and
Corrective Actions
Check the external circuit
(sequence).
Check the external circuit
(sequence).
Open FWD/REV
command of control
circuit terminals.
Check the external circuit
(sequence).
Check the mechanical
system and correct the
cause, or increase the
value of n137.
Parameter n118 up to the
lowest value allowed for
the machine.
Load (output current or
output torque) is too low.
Check the driven machine
and correct the cause of
the fault, or decrease the
value of parameter n118