Toshiba VF-S11 - Manual (Page 80)

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[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
QHH ST terminal OFF • The ST-CC circuit is opened. • Close the ST-CC circuit.
OQHH Undervoltage in main
circuit • The supply voltage between R, S and T is
under voltage.
• Measure the main circuit supply voltage.
If the voltage is at a normal level, the
inverter requires repairing.
TVT[ Retry in process • The inverter is n the process of retry.
• A momentary stop occurred.
• The inverter is normal if it restarts after
several tens of senconds.
The inverter restarts automatically. Be
careful of the machine because it may
suddenly restart.
GTT 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.
ENT 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.
GQHH 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.
J /
NQ
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.
JGCF /
GPF
Display of first/last
data items • The first and last data item in the CWJ
data group is displayed.
• Press MODE key to exit the data group.
FD DC braking • DC braking in process • The message goes off in several tens of
seconds if no problem occurs. Note)
FDZP Shaft fixing control • Motor shaft fixing control is in process. • Normal if the message disappears when
a stop command is entered (or the
operation command is canceled).
G
G
G 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 fequency free unit
magnification H.
UVQR Momentary power
failure slowdown
stop prohibition
function activated. • The slowdown stop prohibition function
set with H (momentary power
failure ride-through operation) is
activated.
• To restart operation, reset the inverter or
input an operation signal again.
NUVR Auto-stop because of
continuous operation
at the lower-limit
frequency • The automatic stop function selected with
H was activated.
• To deactivate the automatic stop function,
increase the frequency command above
the lower-limit frequency (LL) + 0.2 Hz or
turn off the operation command.
KPKV 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).
G Operation panel key
fault • The RUN or STOP key is held down for
more than 20 seconds.
• The RUN or STOP key is faulty.
• Check the operation panel.
CVP Auto-tuning • Auto-tuning in process • Normal if it the message disappears after
a few seconds.
Note) When the ON/OFF function is selected for DC braking (DB), using the input terminal selection parameter, you can judge
the inverter to be normal if “FD” disappears when opening the circuit between the terminal and CC.
[Prealarm display]
E Overcurrent alarm Same as QE (overcurrent)
R Overvoltage alarm Same as QR (overvoltage)
N Overload alarm Same as QN and QN (overload)
J Overheat alarm Same as QJ (overheat)