Instruction manual

138
Alarm Display
Inverter
Status
Explanation
Causes and
Corrective Actions
Digital
Operator
RUN(Green)
ALARM(RED)
Stops
according to
parameter.
STP (Emergency stop)
The inverter stops according
to parameter n005 after
receiving the emergency stop
fault signal.
Check the external
circuit (sequence).
FBL (PID feedback loss
detection)
PID feedback value drops
below the detection level.
When PID feedback loss is
detected, the inverter
operates according to the
n136 setting.
Check the mechanical
system and correct the
cause, or increase the
value of n137.
Fault Display
Inverter
Status
Explanation
Causes and
Corrective Actions
Digital
Operator
RUN(Green)
ALARM(RED)
Option card communications
fault.
Communication fault has
occurred in a mode that run
command and frequency
reference are set from the
communication option card.
Check the
communications
devices or
communication signals.
_
(OFF)
• Insufficient power supply
voltage
• Control power supply fault.
• Hardware fault
Check the following:
• Power supply
voltage
• Main circuit power
supply wiring is
connected
• Terminal screws are
securely tightened
• Control sequence.
Replace the
inverter.