Toshiba VF-S11 - Manual (Page 78)

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Error code Failure code Problem Possible causes Remedies
QR 000A Overvoltage during
acceleration • The imput voltage fluctuates abnormally.
(1) The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened or closed.
(3) A system using a thyrister is connected
to the same power distribution line.
• A restart signal is input to the rotating
motor after a momentary stop, etc.
• Insert a suitable input reactor.
• Use H (auto-restart) and H
(ride-through control).
QR 000B Overvoltage during
deceleration • The deceleration time FGE is too short.
(Regenerative energy is too large.)
• H (dynamic braking resistor) is off.
• H (overvoltage limit operation) is
off.
• The input voltage fluctuates abnormally.
(1) The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened and closed.
(3) A system using a thyrister is connected
to the same power distribution line.
• Increase the deceleration time FGE.
• Install a dynamic braking resistor.
• Enable H (dynamic braking
resistor).
• Enable H (overvoltage limit
operation).
• Insert a suitable input reactor.
QR 000C Overvoltage during
constant-speed
operation • The input voltage fluctuates abnormally.
(1) The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened or closed.
(3) A system using a thyrister is connected
to the same power distribution line.
• The motor is in a regenerative state
because the load causes the motor to run
at a frequency higher than the inverter
output frequency.
• Insert a suitable input reactor.
• Install a dynamic braking resistor.
QN 000D Inverter overload • The acceleration time ACC is too short.
• The DC braking amout is too large.
• The V/F setting is improper.
• A restart signal is input to the rotating
motor after a momentary stop, etc.
• The load is too large.
• Increase the acceleration time CEE.
• Reduce the DC braking amount H
and the DC braking time H.
• Check the V/F parameter setting.
• Use H (auto-restart) and H
(ride-through control).
• Use an inverter with a larger rating.
QN 000E Motor overload • The V/F setting is improper.
• The motor is locked up.
• Low-speed operation is performed
continuously.
• An excessive load is applied to the motor
during operation.
• Check the V/F parameter setting.
• Check the load (operated machine).
• Adjust QNO to the overload that the
motor can withstand during operation in a
low speed range.
QNT 000F Dynamic braking
resistor
overload trip • The deceleration time is too short.
• Dynamic braking is too large.
• Increase the deceleration time FGE.
• Increase the capacity of dynamic braking
resistor (wattage) and adjust PBR
capacity parameter H.
*
QV 0020 Over-torque trip • Over-torque reaches to a detection level
during operation.
• Enable H (over-torque trip
selection).
• Check system error.
QJ 0010 Overheat • The cooling fan does not rotate.
• The ambient temperature is too high.
• The vent is blocked up.
• A heat generating device is installed close
to the inverter.
• The thermistor in the unit is broken.
• Restart the operation by resetting the
inverter after it has cooled down enough.
• The fan requires replacement if it does
not rotate during operation.
• Secure sufficient space around the
inverter.
• Do not place any heat generating device
near the inverter.
• Make a service call.
* You can select a trip ON/OFF by parameters.
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