Toshiba VF-nC1 User Manual download pdf (Page 130)

E6581090

M-2

13

(Continued)

Error

code

Alarm

code

Problem Possible causes Remedies

QR 000B Overvoltage during

deceleration

• The deceleration time FGE is

too short. (Regenerative

energy is too large.)

• H (overvoltage limit

operation) is off.

• The input voltage fluctuates

abnormally.

①The power supply has a

capacity of 200kVA or more.

②A power factor improvement

capacitor is opened or closed.

③A system using a thyristor is

connected to the same power

distribution line.

• Increase the deceleration time

FGE.

• Enable H (overvoltage

limit operation).

• Insert a suitable input reactor.

QR 000C Overvoltage during

constant-speed

operation

• The input voltage fluctuates

abnormally.

①The power supply has a

capacity of 200kVA or more.

②A power factor improvement

capacitor is opened or closed.

③A system using a thyristor 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.

QN 000D Inverter overload

• The acceleration time ACC is

too short.

• The DC braking amount 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.

*

GRJ

0009 Output phase failure

• A phase failure occurred in the

output line of the main circuit.

• Check the main circuit output

line, motor, etc., for phase

failure.

• Enable H (Output phase

failure detection).

(Continued overleaf)

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 142 143

Comments to this Manuals

No comments