Toshiba Tosvert VF-AS1 Bedienungsanleitung PDF herunterladen (Seite 295)

E6581301

M-1

13.

Before making a service call

- Trip information and remedies

13.1 Trip causes/warnings and remedies

When a problem arises, diagnose it in accordance with the following table.

If it is found that replacement of parts is required or the problem cannot be solved by any remedy described in the table,

contact your supplier.

[Trip information]

Error

code

Description Possible causes Remedies

QE

*QER

Overcurrent

during

acceleration

•

The acceleration time

CEE

is too short.

•The V/f setting is improper.

•A restart signal is input to the

rotating motor after a momentary

stop, etc.

•A special motor (e.g. motor with a

small impedance) is used.

•

Manual torque boost value

(

)

is lar

•Increase the acceleration time CEE.

•Check the V/f parameter setting.

•Use WX(Auto-restart) and WXE (Regenerative

power ride-though control).

•Increase the carrier frequency EH.

•Decrease XD setting value.

• Decrease H (stall prevention level) to 130

as a guide.

• Increase EH

(

carrier frequenc

settin

value if it

is set at lower value (2kHz or less).

QE

*QER

Overcurrent

during

deceleration

•The deceleration time FGE is too

short. (in deceleration)

•Increase the deceleration time FGE.

QE

*QER

Overcurrent

during fixed

speed

•The load fluctuates abruptly.

•The load is in an abnormal

condition.

•Reduce the load fluctuation.

•Check the load (operated machine).

[Note] QER, QER,

QER originate from

causes other than those

mentioned above.

•

A main circuit elements is defective.

•Overheat protection is activated.

•Make a service call.

•Check operation of cooling fan.

•Check cooling fan control mode parameter

H.

*QEC

U-phase

arm

short-circuit

•A main circuit elements is defective

(U-phase).

•Make a service call.

*QEC

V-phase

arm

short-circuit

•A main circuit elements is defective

(V-phase).

•Make a service call.

*QEC

W-phase

arm

short-circuit

•A main circuit elements is defective

(W-phase).

•Make a service call.

QEN

loaded side

overcurrent at

start time

•The insulation of the output main

circuit or motor is defective.

•The motor has too small

impedance.

•Check the cables and wires for defective

insulation.

•Selection of short circuit detection at starting

parameter H.

QET

namic brakin

element

overcurrent

(200V-55kW or

larger, 400V-

90kW or lar

)

•PB-PC/+ circuit is shorted.

•A resistor with resistance smaller

than the minimum allowable

resistance is connected.

•Parameter RD was set to  or 

without connecting regenerative

brake or with wire disconnected

(with dynamic braking).

•Check the impedance wirin

for the resistor, etc.

•Make a service call.

•Check if regenerative brake is connected.

•If regenerative brake is not necessary, set

parameter RD to .

QJ Overheating

•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

disconnected.

•Restart the operation b

resettin

the inverter afte

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.

QJ

Thermal trip

stop command

from external

device

• An input signal is impressed at

control input terminal PTG for

optional add-on cards.

•A thermal trip command (input

terminal function:  or ) is

issued by an external control

device.

• The motor is overheated, so check whether the

current flowing into the motor exceeds the rated

current.

QN

Inverter

overload

•Rapid acceleration is operated.

•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 WX

(

Auto-restart

)

and WXE

(

enerative

power ride-though control).

•Use an inverter with a larger rating.

* In the event one of the error codes QER to QER and QEC to QEC appears, in which case a main circuit

component has most probably failed, the only way to reset the inverter is to turn power off and back on.

(Continued overleaf)

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