Toshiba Tosvert VF-AS1 User Manual

Page 298

E6581301

M-4

(Continued)

Error

code

Description

Possible causes

Remedies

GV[R Inverter type

error

•Is circuit board (or main

circuit/drive circuit board)

replaced?

•When board has been replaced, input for V[R.

Analog input

terminal

overvoltage

• Overrated voltage is applied to

analog input.

• Apply voltage within the rated voltage.

Sequence error

•The signal from system is not

inputted into input terminals.

•The input terminal function (,

) is not set up.

• A value other than 0.0 is specified

for H, although the brake
answer function is not used.

•Please check if the sequence is normal or not.
•Please set or as the input terminal to

use.

•Please set up 0.0, when you do not use system-

supporting sequence.

Encoder error

•Disconnection of encoder circuit.

•Check connection of encoder.

Connect encoder correctly.

Speed error
(Over speed)

•Encoder error (inverter error)

•Check connection of encoder.

Connect encoder correctly.

Key failure
alarm

• The same key is input

continuously more than 20
seconds.

• Check the operation panel.

Terminal input
error

•Braking down of a wire for VI/II

input signal.

•Terminal circuit board comes off

and falls

•P24 overcurrent

•Check VI/II input signal.

•Install the control terminal board to the inverter.

•Check P24 terminal short circuit to CC or CCA.

Abnormal
CPU2
communication

• An error arises during CPU2

communication.

•Make a service call.

V/f control error • An internal control error occurs.

•Make a service call.

CPU1 fault

• A software error occurs in the

control CPU.

•Make a service call.

Abnormal logic
input voltage

• An abnormal voltage is applied to

the control logic input terminal.

• Check the signal given to the logic connected with

the input terminal.

Option 1 error

• Expansion I/O card 1 is defective. •Make a service call.

Option 2 error

• Expansion I/O card 2 is defective. •Make a service call.

Stop position
retaining error

•A deviation error occurs during stop

position retaining control.

•The stop position adjustment range

specified with H is too
narrow.

•Creeping speed is too fast.

•Check connection of encoder.

CPU2 fault

•Motor control CPU is defective.

•Make a service call.

UQWV

Step-out (for
PM motors
only)

•The motor shaft is locked.
•One output phase is open.
•An impact load is applied.

•Unlock the motor shaft.
•Check the interconnect cables between the inverter

and the motor.

Note: Please contact us if you find any trips other than the above.

[Alarm] The following are messages only. No trip is developed.

Error
code

Problem

Possible causes

Remedies

QHH

ST signal OFF

•ST terminal is in open-circuit.

•Close ST-CC circuit.

OQHH

Undervoltage in
main circuit

•The supply voltage between R, S

and T is under voltage.

•Trouble of rush current restraint

circuit or DC circuit fuse.

•Measure the main circuit supply voltage.

If the voltage is at a normal level, the inverter
requires repairing.

•Make a service call.

TVT[

Retry

•The inverter is in the process of

retry.

•A momentary stop occurred.

•The inverter is normal if it restarts after several

tens of seconds. The inverter restarts
automatically. Be careful of the machine because it
may suddenly restart.

GTT

Point setting
alarm

•The frequency setting signals at

points 1 and 2 are set too close to
each other.

•Set the frequency setting signals at points 1 and 2

apart from each other.

(Continued overleaf)