Toshiba TOSVERT VF-AS1 Instruction Manual page 309

(Continued)
Error
code




Note: In the case of DC injection breaking ON/OFF function is selected for an input terminal; if "" disappears as a
result of open-circuit between the terminal and CC, it is normal.
[Pre-alarm display]
Error
code





If two or more problems arise simultaneously, one of the following alarms appears and blinks.
, , , , ......, 
The blinking alarms , , , , are displayed in this order from left to right.
13
Problem Possible causes
•Braking operation is not performed
normally.
Brake sequence
•The load is too heavy.
learning error
•There are some operation errors.
Light-load high- •There are some errors in the
speed learning operation for learning for light-load
operation error high-speed operation.
•Learning operation for light-load
high-speed operation is performed
Light-load high-
while the load is lifted.
speed learning
•Motor constants (, ,
overload error
 to ) are not
entered correctly.
•This message appears if the
Key operation ENTER key is pressed and held
permitted down for 5 seconds or more when
temporarily key operation is prohibited by
.
Description
Overcurrent pre-alarm Same as  (Overcurrent)
Overvoltage pre-alarm Same as  (Overvoltage)
Achieving PBR operation  blink while PBR is operating is not an
level error.
Overload pre-alarm Same as  and  (Overload)
Overheat pre-alarm Same as  (Overheat)
Communication error •Various transmission errors occur
when computer is linked up with
inverter system.
•Various transmission errors occur in
inverter to inverter communication
(slave side). Time-out or trip in master
side.
•Brake signal output (, ) is not assigned to
the control output terminal.
•The brake function mode selection parameter
() is not set.
•Learning is performed while the load is lifted
•Check whether the learning operation for light-load
high-speed operation is performed correctly.
⇒ Refer to 6.16.
•Check the load.
•Check the motor constant setting.
•When this message is displayed, all the keys are
operational. To prohibit key operation again, turn
off the inverter and then turn it back on.
Possible causes
Same as  (Overcurrent)
Same as  (Overvoltage)
 blink while PBR is operating is not an
error.
Same as  and  (Overload)
Same as  (Overheat)
•For measures to correct various kinds
of data transmission errors, refer to
the instruction manual for the
communications device used specified
in Section 6.42.
•Check the master inverter.
M-6
E6581445
Remedies
Remedies