Toshiba Tosvert VF-A5 User Manual

11. Error Displays and Troubleshooting
Inverter trip causes and remedies are shown in Table 11-1, and the causes and remedies of other
problems
are shown in Table 11-2. If part replacement is necessary, or when the problem cannot be
remedied with the listed procedures, contact your nearest Toshiba branch or sales office.
11.1 Inverter Trip Causes and Remedies
Trip cause displays, alarm displays, display details, and applicable remedies are listed below.
Table 11-1 Fault displays, details, and remedies
Display Details
Presumed causes
Remedies
Reference
page
oc
I
Overcurrent during ·The acceleration time 1BrrJ is too Increase the acceleration time ~ .
53
,..,,.
IP
acceleration
short.
........
(DC section)
·The V /f selection is incorrect.
Check the V/f pattern setting.
50
•Start was attempted on a rotating motor
Use auto-restart or regeneration power
84
after a momentary power failure, etc. ride-through control.
•Is a special (low impedance) motor being
Try inserting an AC reactor on the output.
103
used?
Try increasing the carrier frequency.
71
0[2
Overcurrent during • l he decelerat i on time GifrJ is too •Increase the deceleration time
53
GC2P deceleration
short.
~-
(DC section)
0[3
Overcurrent during
·The load changed suddenly .
Reduce the load fluctuat i ons .
5
OC3P
constant speed run
•The load is faulty .
Check the load equipment.
(DC section)
Note) There are causes other
•A main circuit power transistor is faulty.
Refer to
OCR .
105
than those listed above •The overheating protection has Refer to
OH.
106
for
OC IP,
OC2P and
functioned. (5.5-30kW)
OC3P
·The control power supply undervoltage Refer to
UP I, PDt=F . noFF 107
protection has functioned . (5 .5-30kW)
,..,,.,
Overcurrent
•The output main circuit wiring or motor
Check the condition of the wiring and
9
...........
(overcurrent on insulation is faulty . insulation .
l
oad-side during
·The motor impedance is too small.
Change the setting of the output short
85
start-up) circuit detection selection ~ .
OCR
: U-phase armature
•The main circuit U-phase power transistor
Check the main circuit U-phase power
21
short circuit
is faulty.
transistor .
The transistor element must be replaced.
OCF12
V-phase armature ·The main circuit V-phase power trans i stor
Check the main circuit V-phase power
21
short circuit is faulty. transistor.
The transistor element must be replaced.
GCR3
W-phase armature
·The main circuit W-phase power
Check the main circuit W-phase power
21
short circuit
transistor is faulty.
transistor.
The transistor element must be replaced.
no 1
....,, .
Overvoltage during •The input voltage fluctuated abnormally.
Try inserting an input AC reactor.
13
acceleration (j) The power source capacity is 500kVA
or more.
®Power-factor improvement capacitors
went on-l i ne/off - line .
@A device using thyristors is connected
to the same power li ne .
•Start was attempted on a rotating motor
Use auto-restart or regenerat i on power
84
after a momentary power failure . etc.
ride-through control.
OP2
Overvoltage during
•The acceleration time ldE [ I is too Increase the deceleration time l.:tE [I .
53
deceleration
short.
(The amount of regenerated power is too
Install a dynamic braking re si stor.
103
large.)
•The DBR resistance value~ is
Decrease the dynamic braki ng re si st ance
82
too large .
value~ .
The dynamic braking function
Select the dynamic br aking
~ isOFF. function~ .
·OP stall lQeS05J is OFF .
Se l ect OP stall IOP 5 5 I .
•The input voltage fluc t ua t ed a bn ormally .
Try i nserting an input AC reac t or. 13
(j)The power source ca p ac i ty is 500kVA
or more.
®Power-factor improvement capac i tors
went on-line/off-line .
@A device using thyristor s is co nnected
to the same power li ne.
-105-
I

Toshiba Tosvert VF-A5 Specifications

General

Brand	Toshiba
Model	Tosvert VF-A5
Category	Inverter
Language	English