Toshiba TOSVERT VF-MB1 Instruction Manual page 338

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