YASKAWA VS-606V7 Series Instruction Manual page 134

Alarm Display
Digital RUN (Green)
Operator ALARM (Red)
* Display only applies to 200/400V class,7.5/10Hp, 5.5/7.5 kW inverters.
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Inverter
Explanation
Status Corrective Actions
OC (Over current) • Short circuit or
Inverter output current grounding at inverter
momentarily exceeds approx. output side.
250% of rated current.
• Excessive load WK
• Extremely rapid
accel/decel time
(parameters n019 to
n022)
• Special motor used
• Starting motor during
coasting
• Motor of a capacity
greater than the
inverter rating has
been started.
• Magnetic contactor
open/closed at the
inverter output side.
(Load Short-circuit)* A short-circuit or
The Inverter output or load ground fault.
was short circuited.
Reset the fault
correcting its cause.
(Ground Fault)* A ground fault occurred
Protective
The ground fault current at the at the Inverter output.
Operation
Inverter output exceeded
approximately 50% of the Reset the fault after
Output is shut
Inverter rated output current. correcting its cause.
OFF and motor
OV (Main circuit over voltage) • Insufficient decel
coasts to a
Main circuit DC voltage time (parameters
stop.
exceeds the overfatigue n020 and n022)
detection level because of • Lowering of minus
excessive regenerative load (elevator, etc.)
energy from the motor.
Detection level: • Increase decel time.
200V: Stops at main circuit • Connect optional
DC voltage below braking resistor.
approx. 410V
400V: Stops at main circuit
DC voltage approx.
820V or more
UV1 (Main circuit low voltage) • Reduction of input
Main circuit DC voltage drops power supply voltage
below the low voltage • Open phase of input
detection level while the supply
inverter output is ON. • Occurrence of
200V: Stops at main circuit momentary power
DC voltage below loss
approx. 200V (160V for
single phase) Check the following:
400V: Stops at main circuit • Power supply
DC voltage approx. voltage
400V or more • Main circuit power
supply wiring is
connected.
• Terminal screws are
securely tightened.
Causes and
2
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