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6. TROUBLESHOOTING
6-3
6
Table 6-1 (Continued)
Indication
Operation
panel
(Actual
characters
)
Parameter
unit
Protective
Function Name
Detection Level
Estimated Cause (
)
and
Corrective Action (•)
(E. GF)
Output side
ground fault
overcurrent
Any of outputs U, V, W is in a ground fault.
(E. 0V1)
Acceleration-
time overvolta
g
e
Main circuit DC
voltage is more
than 400V.
Surge compounded with power during
acceleration operation.
•
Install a reactor.
•
Fit a surge suppressor or like to the surge
source.
The regenerative energy handling capability is
insufficient.
•
Fit the regenerative brake option.
(E. 0V2)
Constant speed-
time overvolta
g
e
Main circuit DC
voltage is more
than 400V.
Surge compounded with power during
acceleration operation.
•
Install a reactor.
•
Fit a surge suppressor or like to the surge
source.
Load increased suddenly, activating the stall
prevention function.
The regenerative energy handling capability is
insufficient.
•
Fit the regenerative brake option.
(E. V3)
Deceleration-
time overvolta
g
e
Main circuit DC
voltage is more
than 400V.
The deceleration torque is beyond the drive
unit capability.
•
Increase the deceleration time.
•
Change the acceleration/deceleration
pattern to an S shape.
The regenerative energy handling capability is
insufficient.
•
Fit the regenerative brake option.
Surge compounded with power during
deceleration operation or stop.
•
Install a reactor.
•
Fit a surge suppressor or like to the surge
source.
(E. THT)
(E. THM)
Electronic
overcurrent
protection
Refer to: Pr. 9
[Section 8.5.8]
The motor and drive unit are operated under
overload.
•
Reduce the load.
•
Increase the capacities of the motor and
drive unit.
(E. IPF)
Instantaneous
power failure
15 to 100ms.
MEMO
An instantaneous
p
ower failure occurred.
(E. UVT)
Undervoltage
Power supply
voltage is less
than about 150V.
Large-capacity equipment was started
nearby.
The jumper across terminals P/+-P1 has been
disconnected.
•
Connect the jumper or DC reactor.
(E. FIN)
Fin overheat
Heat sink
temperature is
higher than the
permissible value
of the components.
The ambient temperate exceeded the
permissible temperature.
The cooling fan failed.
MEMO
An alarm signal can be provided by
making control circuit output terminal
assignment.