Toshiba VF-nC1 - Manual (Page 132)

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M-4
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(Continued)
Error
code Alarm
code
Problem Possible causes Remedies
G 0033 CPU
communications
error • A communications error occurs
between control CPUs.
• Make a service call.
G 0034 Excessive torque
boosted • The torque boost parameter
XD is set too high.
• The impedance of the motor is
too small.
• Decrease the setting of the
torque boost parameter XD
• If no improvement results,
contact Toshiba Technical
Support Center.
* With a parameter, you can choose between trip-on and -off.
[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 in the process of
retry.
• A momentary stop occurred.
• The inverter is normal if it
restarts after several tens of
seconds.
The inverter restarts
automatically. Be careful of
the machine because it may
suddenly restart.
GTT Frequency point
setting error • 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.
JK /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 or last data item in the
CWJ /CWH data group is
displayed.
• Press the MON 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)
G Flowing out of
excess number of
digits • The numeric value displayed
(e.g., frequency) has a larger
number of digits than the
display panel. (The number
next to the E refers to the
excess number of digits.)
• When a frequency is displayed,
decrease the setting of H
(free unit).
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