Toshiba Tosvert VF-A5 - Manual (Page 103)

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 1 Overcurrent during
• The acceleration time 1 R C C 1 is too Increase the acceleration time 1 P C C 1 . 48
D C I P
acceleration
(DC section)
short
• The V/f selection is incorrect. Check the V/f pattern setting. 45
• Start was attempted on a rotating motor
after a momentary power failure, etc.
Use auto-restart or regeneration power
ride-through control.
79
• Is a special (low impedance) motor being Try inserting an AC reactor on the output. 95
used?
Try increasing the carrier frequency. 66
D C E Overcurrent during
• The deceleration time i d E C 1 is too
. Increase the deceleration time 48
O C S P
deceleration
(DC section)
short. 1 E E C 1 .
D C 3
D C 3 P
Overcurrent during
constant speed run
(DC section)
• The load changed suddenly.
• The load is faulty. Fleduce the load fluctuations.
Check the load equipment. 5
Note) There are causes other
than those listed above
for Df IP. OCiPand
DHP-
• A main circuit power transistor is faulty.
• The overheating protection has
functioned. (5.5~30kW)
• The control power supply undervoltage
protection has functioned. (5.5~30kV^
Referto D C R ■
Refer t o O H ■
Referto UP 1 , PDFF, (TOFF •
97
98
99
D E L Overcurrent
(overcurrent on
• The output main circuit wiring or motor
insulation is faulty.
Check the condition of the wiring and
insulation. 9
load-side during
start-up) • The motor impedance is too small. Change the setting of the output short
circuit detection selection 1 D C L 5 1 .
80
O C R 1 U-phase eurnature
short circuit
• The main circuit U-phase power transistor
is faulty.
Check the main circuit U-phase power
transistor.
The transistor element must be replaced.
21
O C R E V-phase armature
short circuit • The main circuit V-phase power transistor
is faulty.
Check the main circuit V-phase power
transistor.
The transistor element must be replaced.
21
D C R 3 W-phase armature
short circuit • The main circuit W-phase power
transistor is faulty.
Chock the main circuit W-phase power
transistor.
The transistor element must be replaced.
21
O P 1 Overvoltage during
acceleration • The input voltage fluctuated abnormally.
(D 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
• Start was attempted on a rotating motor
after a momentary power failure, etc.
Use auto-restart or regeneration power
ride-through control. 79
O P E Overvoltage during 48
• The acceleration time 1 E E C Ì is too Increase the deceleration time 1 1.
deceleration
short.
(The amount of regenerated power is too
large.)
Install a dynamic braking resistor. 95
• The DBR resistance value 1 P b r - 1 is Decrease the dynamic braking resistance 77
too large.
The dynamic braking function
rPbl tsOFF.
value 1 Pb/- 1 .
Select the dynamic braking
function 1 Pb 1 -
.OP stall 1 OPS E 1 is OFF.
Select OP stall 1 O P 5 5 1 •
. The input voltage fluctuated abnormally.
© The power source capacity is SCXDkVA
or more.
(g) 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
- 9 7 -