Toshiba Tosvert VF-A5 - Manual (Page 104)

Table 11-1 Fault displays, details, and remedies
Display Details Presumed causes Remedies
Reference
page
П Р Э Overvoltage during
constant speed run • The input voltage fluctuated abnormally.
© The power source capacity is SOOkVA
or more.
® Power-factor improvement capacitors
went on-line/off-line.
® A device using thyristors is connected
to the same power line.
Try inserting an input AC reactor. 13
• The motor is rotating at a frequency
higher than the inverter output frequency
due to a force on the load, and is in a
regenerative state.
© There are multiple machanioaily-
coupled motors.
® The load undergoes piston-type cyclic
movement
Change the load so that a regenerative
state is not entered.
Install a dynamic braking resistor.
17
D L I n Inverter overload • Sudden motor acceleration was
attempted.
Decrease the acceleration time
[ Я С С 1 •
48
-
• The DC injection current (time) is set too
high Oong).
Decrease the DC injection current
1 cfb C 1 DC injection time
74, 75, 76
1 db fc 1 '
• Start was attempted on a rotating motor
after momentary power failure, etc.
Use auto-restart or regeneration power
ride-through control.
79
• The load is too large. Increase the inverter rating.
90
DL ЛЬ Motor overload • V/f is incorrect Check the V/f pattern setting. 45
• The motor is constrained. Check the load equipment.
5
• Continuous running at low speeds.
• Motor is being operated in the overload
area.
Adjust I D L Г" i according to the
motor's overload handling characteristics
at low speeds.
72
DCr Dynamic braking
resistor overcurrent
trip
• The motor decelerated suddenly. Decrease the deceleration time
1 oLEL l •
48
O L r Dynamic braking
resistor overload
• The DC injection current is too high. Decrease the DC injection current
1 cf ЫГ 1 and DC injection time
74, 75, 76
trip 1 d b b 1 •
D H Overheat • The cooling fan is not working. Check the cooling fan.
—
• The fan ventilation inlet is blocked.
• Another heat-generating device is located
nearby.
Check the inverter installation space.
Do not place heat-generating devices near
the inverter.
2
• The thermistor in the unit is dislocated. Check the main circuit PCB CN6.
£ Emergency stop • Motor was stopped during automatic run
or remote operation with the panel.
Reset. 43, 44
E E P 1 EEPROM fault • An error occurred during writing of data
to the EEPROM.
Cycle power to the unit OFF/ON. If the
error persists, repair is required.
44
Е Е Р Б Initial read fault • Fault in the internal data. Repair is required.
—
E r r SRAM fault • Fault in the microcontroller RAM. Repair is required.
—
E r г 3ROM fault • Fault in the microcontroller ROM. Repair is required.
E r г ЧCPU fault • Fault in the microcontroller CPU. Repair is required.
—
E r r S Communication • A fault occurred during communication Check the communication device and
_
operating
command fault operation. wiring, etc.
Е г г Б Gate array fault • Fault in the main gate array. Repair is required.
_
E r r ! Output current
detection device
fault
• Fault in the output current detection
device
Repair is required.
—
E r r ВOption PCB fault • Fault in an option PCB. Check the option PCB connections, etc.
* U E Low current run
condition trip • The output current dropped to the low
current detection level while running.
—
98
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