Toshiba TOSVERT VF-PS1 User Manual

 E6581386
M-2
13
(Continued)
Error
code
Description Possible causes Remedies
QN
Inverter
overload
•Rapid acceleration is operated.
•The DC braking amount is too
large.
•The V/f setting is improper.
•A restart signal is input to the
rotating motor after a momentary
stop, etc.
•The load is too large.
•Increase the acceleration time CEE.
•Reduce the DC braking amount H and the
DC braking time H.
•Check the V/f parameter setting.
•Use WX (Auto-restart) and WXE (Regenerative
power ride-though control).
•Use an inverter with a larger rating.
QN Motor overload
• The V/f parameter is improperly
set.
•The motor is locked up.
•Low-speed operation is performed
continuously.
•An excessive load is applied to the
motor during operation.
•Check the V/f parameter setting.
•Check the load (operated machine).
•Check the QNO setting and adjust H
according to the sustainable overload in the motor
low-speed range.
• Reduce the DC braking amount H and the
DC braking time H.
QNT
Dynamic
braking resistor
overload
•Rapid deceleration is operated.
•Dynamic braking is too large.
•Increase the deceleration time FGE.
•Increase the capacity of dynamic braking resistor
(wattage) and adjust PBR capacity parameter
RDER.
QR
Overvoltage
during
acceleration
• The input voltage fluctuates abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
capacitor is opened and closed.
(3)A system using a thyrister is
connected to the same power
distribution line.
•A restart signal is input to the
rotating motor after a momentary
stop, etc.
•Insert a suitable input reactor.
•Use WX (Auto-restart) and WXE (Regenerative
power ride-though control).
QR
Overvoltage
during
deceleration
• The deceleration time FGE is too
short (regenerative energy is too
large).
•The dynamic braking resistor has
a considerably large resistance.
• RD (Dynamic braking resistor) is OFF.
Overvoltage limit operation H
is OFF.
• The input voltage fluctuates abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
capacitor is opened and closed.
(3)A system using a thyrister is
connected to the same power
distribution line.
•Increase the deceleration time FGE.
•Install a dynamic braking resistor.
•Decrease dynamic braking resistance. (Also reset
the RDT.)
•Set dynamic braking mode parameter RD
properly.
•Set overvoltage limit operation H properly.
•Insert a suitable input reactor.
QR
Overvoltage
during fixed
speed operation
•The input voltage fluctuates
abnormally.
(1)The power supply has a capacity
of 500kVA or more.
(2)A power factor improvement
capacitor is opened and closed.
(3)A system using a thyrister is
connected to the same power
distribution line.
•The motor is in a regenerative
state because the load causes the
motor to run at a frequency higher
than the inverter output frequency.
•Insert a suitable input reactor.
•Install a dynamic braking resistor.
*QV Overtorque
•Overtorque reaches to a detection
level during operation.
•Check system error.
•Check whether the motor is overloaded or the
brake is engaged.
*WE Low current
•The output current decreased to a
low-current detection level during
operation.
•Check the suitable detection level for the system
(H).
•Contact your Toshiba distributor if the setting is
correct.
*WR
Voltage drop in
main circuit
•The input voltage (in the main
circuit) is too low.
•Check the input voltage.
G Emergency stop
•Inverter is stopped by panel
operation during automatic or
remote operation.
•A stop command (input terminal
function:  or ) is issued by
an external control device.
•Reset the inverter.
*Presence or absence of parameter trip can be selected.(Continued overleaf)

Toshiba TOSVERT VF-PS1 Specifications

General

Brand	Toshiba
Model	TOSVERT VF-PS1
Category	Power Supply
Language	English