Toshiba TOSVERT VF-P7 Instruction Manual page 241

[Message] The following are messages only. No trip is developed.
Indication Contents
ST-CC opened

Control circuit

undervoltage
Main circuit

undervoltage
Retry indication

Frequency point
 setting error
alarm
Clear enabling

indication
Emergency stop
 enabling
indication
Alarm for setup
value error
(Error indication
/ and data are
alternately
displayed twice
each.)
DC braking

indication

Panel indication

 overflow
Communication

error
Parameter is
 under
initialization.
In auto-tuning

Note: In the case DC injection braking 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]
Indication
Overcurrent alarm

Overvoltage alarm

Achieving PBR operation level
 Overload alarm
Overheat alarm

When two or more alarms occur at the same time, such the message as shown in the following blinks.
, , , ,・・・・・, 
Blinking indications appear in order of , , ,  from the leftmost place to right.
Expected causes
･ ST terminal is in open-circuit.
･ Undervoltage between RO and
SO of control power supply
(when option is used for 22 kW
or lower type).
･ Undervoltage between R, S and
T of main circuit power supply.
･ Trouble of pre-charge circuit
or DC circuit fuse.
･ In retry operation.
･ Momentary power failure is
occurred.
･ Points 1 and 2 of frequency
setting signal are set too close to
each other.
･ If STOP key is pressed after trip
indication, this indication
appears.
･ Stop operation is performed by
panel during automatic or
remote operation.
･ Setup value error is detected in
reading out or writing data.
･ Under DC braking
･ Under motor shaft fixing control
･ Number to be shown on panel
such as frequency and so on
overflows figures of display.
(Number of overflowing digits is
indicated.)
･ 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.
･ Parameters are initialized to be
standard default values.
･ Under auto-tuning.
Contents
Same as  (over-current)
Same as  (over-voltage)
P blink while PBR is operating is not an error.
Same as  /  (overload)
Same as  (overheat)
L-4
Countermeasures
･ Close ST-CC circuit.
･ Measure supply voltage of control
power. If voltage is normal, it needs
repair service.
･ Measure supply voltage of main
circuit power. If voltage is normal, it
needs repair service.
･ Make a service call.
･ If inverter automatically restarts
dozens of seconds later, it is
normal. Be careful of inverter in
retry status, because there is a fear
that it may suddenly restart.
･ Set points 1 and 2 of frequency
setting signal apart from each
other.
･ Press STOP key once more for
resetting.
･ If STOP key is pressed, emergency
stop is executed. To cancel
emergency stop, press any other
key.
･ Check setup value for input error.
･ If message disappears dozens of
seconds later, it is normal. (Note)
･ If message disappears by stop
command (ST-CC open), it is
normal.
･ For indication of frequency, set
multiplying rate () lower.
(Parameter setting that results in
overflow is of course valid.)
･ For countermeasures against
various transmission errors, refer to
the "Manual for communication".
･ Check the master inverter.
･ If message disappears dozens of
seconds later, it is normal.
･ If message disappears several
seconds later, it is normal.
Expected causes and countermeasures