Toshiba TOSVERT VF-MB1, Instruction Manual

Page: 338 / 350

E6581697
M-5
13
(Continued)

0047 Auto-tuning error 
When auto-tuning (relating parameters
are
pt = 6 , f400 = 2 ) or initial position
estimation for permanent magnet motor
( relating parameters is
f915 = 3 , 4 ) is
activated, the current of the permanent
magnet motor exceeded the threshold
level.

The inductance of permanent magnet
motor is too small.

Auto tuning for permanent magnet motor
is not allowed for this motor, please
measure inductance with the LCR meter
etc.

The control law with initial positional
presumption (
f915
=
3
,
4
) is not
allowed, other control modes should be
selected (
f915 = 0 , 1 , 2 ).

Please select f915 = 0 for the SPM
motor.
[Alarm information]
Each message in the table is displayed to give a warning but does not cause the inverter to trip.
Error code Problem Possible causes Remedies

ST terminal OFF

The ST-CC circuit is opened.

Close the ST-CC circuit.

Undervoltage in main
circuit

The supply voltage between R, S and T is
under voltage.

Internal communication fault.

Measure the main circuit supply voltage.
If the voltage is at a normal level, the inverter
requires repairing for fault.

Retry in process 
The inverter is in process of retry.

A momentary stop occurred.
The motor speed is being detected.

The inverter restarts automatically. Be careful
of the machine because it may suddenly
restart.

Frequency point
setting error 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.

Clear command
acceptable 
This message is displayed when pressing
the STOP key while an error code is
displayed.

Press the STOP key again to clear the trip.

Emergency stop
command acceptable 
The operation panel is used to stop the
operation in automatic control or remote
control mode.

Press the STOP key for an emergency stop.
To cancel the emergency stop, press any
other key.

/

Setting error alarm /
An error code and
data are displayed
alternately twice
each. 
An error is found in a setting when data is
reading or writing.

Check whether the setting is made correctly.
 /

Display of first/last
data items 
The first and last data item in the

data group is displayed.

Press MODE key to exit the data group.

DC braking 
DC braking in process

The message goes off in several tens of
seconds if no problem occurs. Note 1)



Flowing out of
excess number of
digits 
The number of digits such as frequencies
is more than 4.
(The upper digits have a priority.)

Lower the frequency free unit magnification
 .

Momentary power
failure deceleration
stop prohibition
function activated.

The slowdown stop prohibition function
set with

(momentary power
failure ride-through operation) is
activated.

To restart operation, reset the inverter or input
an operation signal again.

Auto-stop because of
continuous operation
at the lower-limit
frequency 
The automatic stop function selected with
 was activated.

This function is cancelled, when frequency
reference reaches LL+0.2Hz or operation
command is OFF.

Parameters in the
process of
initialization 
Parameters are being initialized to default
values.

Normal if the message disappears after a
while (several seconds to several tens of
seconds).

Points setting alarm 1 
In case of
pt
=
7
, there are same setting
value at least two on parameter vl ,
f190 , f192 , f194 , f196 , or
f198
except 0.0Hz.

Set the points to different values.

Points setting alarm 2 
In case of
pt
=
7
, the inclination of V/f is
too high.

Set the inclination of V/f to be flat.
Note 1) When the DC braking (DB) function is assigned by using the input terminal function 22 or 23,
it is normal if “

” disappears when opening the circuit between the terminal and CC.
(Continued overleaf)