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E6580757
M-1
13
13. Before making a service call
- Trip information and remedies
13.1 Trip causes/warnings and remedies
When a problem arises, diagnose it in accordance with the following table. If it is found that replacement of parts
is required or the problem cannot be solved by any remedy described in the table, contact your Toshiba dealer.
[Trip information]
Error code
Communication
No.
Problem Possible causes Remedies
1 Overcurrent during
acceleration
• The acceleration time is too short.
• The V/F setting is improper.
• A restart signal is input to the rotating
motor after a momentary stop, etc.
• A special motor (e.g. motor with a small
impedance) is used.
• Increase the acceleration time .
• Check the V/F parameter.
• Use (auto-restart) and
(ride-through control).
• Increase the carrier frequency .
2 Overcurrent during
deceleration
• The deceleration time is too short.
(During deceleration)
• Increase the deceleration time .
3 Overcurrent during
operation
• The load fluctuates abruptly.
• The load is in an abnormal condition.
• Reduce the load fluctuation.
• Check the load (operated machine).
5 Arm overcurrent at
start-up
• A main circuit element is defective. • Make a service call.
4 Overcurrent (An
overcurrent on the
load side at start-up)
• The insulation of the output main circuit or
motor is defective.
• The motor has too small impedance.
• Check the cables and wires for defective
insulation.
A Overvoltage during
acceleration
• The input voltage fluctuates abnormally.
(1) The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened or closed.
(3) A system using a thyristor 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 (auto-restart) and
(ride-through control).
B Overvoltage during
deceleration
• The deceleration time is too short.
(Regenerative energy is too large.)
• (dynamic braking resistor activa-
tion) is off.
• (overvoltage limit operation) is off.
• The input voltage fluctuates abnormally.
(1) The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened or closed.
(3) A system using a thyristor is connected
to the same power distribution line.
• Increase the deceleration time .
• Install a suitable dynamic braking resistor.
• Enable (dynamic braking selec-
tion).
• Enable (overvoltage limit opera-
tion).
• Insert a suitable input reactor.
(Continued overleaf)