Instruction manual

135
<Corrective Actions of Models with Digital Operator>
Alarm Display and Contents
Alarm Display
Digital
Operator
RUN (Green)
ALARM (Red)
Inverter
Status
Explanation
Causes and
Corrective Actions
Warning
Fault
contacts
do not
change
state.
200V: Main circuit DC voltage
drops below approx.
200V.
(160V for single-
phase)
400V:
Main circuit DC voltage
drops below approx.
400V.
(Control supply fault)
Control power supply fault
is detected while the
inverter output is OFF.
CAL (MEMOBUS
communications waiting)
Correct data has not been
received from the PLC
when the constants
n003 (run command
selection) is 2 or
n004(frequency reference
selection) is 6,
and power is turned ON.
Check communication
devices, and transmission
signals.
OH
Blinking
CRL
Blinking
UV (Main circuit low voltage)
Main circuit DC voltage
drops below the low-voltage
detection level while the
inverter output is OFF.
OV (Main circuit overvoltage)
Main circuit DC voltage
exceeds the overvoltage
detection level while the
inverter output is OFF.
Detection level
200V class : approx 410V or
more
400V class : approx 820V or
more
OH (Cooling fin overheat)
Intake air temperature
rises while the inverter
output is OFF.
Check the following :
• Power supply voltage
• Main circuit power
supply wiring is
connected.
• Terminal screws are
securely tightened.
Check the power supply
voltage.
Check the intake air
temperature.
U
Blinking
O
Blinking
: ON : BLINKING : OFF