YASKAWA VS-606V7 Series Instruction Manual page 131

< Corrective Actions of models with digital operator >
: ON
Alarm Display
Digital RUN (Green)
Operator ALARM (Red)
Blinking
Blinking
Blinking
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Blinking
*Display only applies to 200/400V class. 7.5/10hp(5.5/7.5kW) inverters.
130
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: Blinking : OFF
Alarm Display and Contents
Inverter
Explanation
Status
UV (Main circuit low voltage)
Main circuit DC voltage drops
below the low-voltage
detection level while the
inverter output is OFF.
200V: Stops at main circuit
DC voltage below
approx. 200V (160V for
single phase)
400V:Stops at main circuit DC
voltage below approx.
400V.
(Control supply fault) Control
power supply fault is detected
while the inverter output is
OFF.
OV (Main circuit over voltage)
Main circuit DC voltage
exceeds the over voltage
detection level while the
inverter output is OFF.
Warning
Detection level:
200V class: Approx 410V or
Fault contacts
more
do not change
400V class: Approx 820V or
state.
more
OH (Cooling fin overheat)
Intake air temperature rises
while the inverter output is
OFF.
OH3(Inverter overheating pre-
alarm)* signal is input.
CAL (MEMOBUS
communications waiting)
Correct data has not been
received from the PLC when
the parameters n003
(operation command
selection) is 2 or n004
(frequency reference
selection) is 6, and power is
turned ON.
Causes and
Corrective Actions
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.
Release the input of
inverter overheating
pre-alarm signal.
Check communication
devices and
transmission signals.