Toshiba TOSVERT VF-A5 Instruction Manual page 112

Table 11-1 Fault displays, details, and remedies
Display
Details Presumed causes Remedies
Reference
page
OP3 Overvoltage during ·The input voltage fluctuated abnormally. Try inserting an input AC reactor. 13
constant speed run
Q)
The power source capacity is 500kVA
or more.
@
Power-factor improvement capacitors
went on-line/off-line.
@A device using thyristors is connected Change the load so that a regenerative
17
to the same power line. state is not entered.
•The motor is rotating at a frequency Jnstall a dynamic braking resistor.
higher than the inverter output frequency
due to a force on the load, and is in a
regenerative state.
Q)
There are multiple machanically-
coupled motors.
@The load undergoes piston-type cyclic
movement.
,....,
In
Inverter overload •Sudden motor acceleration was Increase the acceleration time
53
'-''-
attempted.
[fil7].
•The DC injection current (time) is set too Decrease the DC injection current
79.80.81
high (long).
~
and DC injection time
ldbtl,
·Start was attempted on a rotating motor Use auto-restart or regeneration power
84
after momentary power failure, etc. ride-through control.
·The load is too large. Increase the inverter rating.
95,96
DL
nc
Motor overload ·V/f is incorrect. Check the V/f pattern setting.
50
·The motor is constrained. Check the load equipment.
5
•Continuous running at low speeds. Adjust
~
according to the 77
•Motor is being operated in the overload motor's overload handling characteristics
area. at low speeds.
ac,-
Dynamic braking •The dynamic braking circuit transistor Repair is required.
-
resistor overcurrent is faulty.
trip
OL,-
Dynamic braking •The motor decelerated suddenly. Increase the deceleration time
53
resistor overload
ldECI.
trip ·The DC injection current is too high. Decrease the DC injection current
ldb[
I
and DC injection time
79,80,81
ldbtl.
OH
Overheat
·The cooling fan 1s not working.
Check the cooling fan.
-
·The fan ventilation inlet is blocked. Check the inverter installation space. 2
•Another heat-generating device is located Do not place heat-generating devices near
nearby. the inverter.
•The thermistor in the unit is dislocated. Check the main circuit PCB CN6.
EFU
DC fuse cut •The DC fuse is cut. Replacement of the fuse is required.
-
E Emergency stop •Motor was stopped during automatic run Reset. 48,49
or remote operation with the panel.
EEP:
EEPROM fault
•An error occurred during writing of data
Cycle power to the unit OFF/ON. If the 49
to the EEPROM.
error persists, repair is reouired.
EEP2 I nit1al read fault •Fault in the internal data. Repair is required.
-
E.-.-2 RAM fault •Fault in the microcontroller RAM. Repair 1s required.
-
E.-.-3 ROM fault •Fault in the microcontroller ROM. Repair is required.
-
E.-.-'-1 CPU fault •Fault in the microcontroller CPU.
Repair is required.
-
E.-.-5
Communication •A fault occurred during communication Check the communication device and
-
interruption error
operation.
wiring, etc.
E.-.-5 Gate array fault
·Fault in the main gate array. Repair is required.
-
E.-.-
'1 Output current ·Fault in the output current detection Repair is required.
-
detection device fault device.
E.-.-8 Option PCB fault ·Fault in an option PCB. Check the option PCB connections. etc.
-
E.-.-9 Optional ROM drop-off error •Optional ROM is not mounted correctly.
Remount the optional ROM. then enter
-
(Only for the software virsion 120)
3
on~
of
c.-.ut:
to clear the
data.
*UC Low current run ·The output current dropped to the low Check that it is adjusted to tne detection
-
condition trip current detection level while running.
level suitable for the system • :... :...
.°
C ' .
If the setting has no abnormality. re;;air
is required.
-106-