110
6.1.2.
List of Protection Messages
The table below lists what appear in the seven-segment display on the console when the converter starts
a protection operation due to an abnormality while it operates.
■
Common to all models
Display
Protection item
Description
Overcurrent protection An instantaneous value of AC current becomes more than or equal
to 3.58 times of the rated converter current.
IGBT protection
IGBT is protected from overcurrent or the gate power supply is
decreased.
Emergency stop A
The multifunction input specified for the emergency stop A
(Normally open) has been ON.
Emergency stop B
The multifunction input specified for the emergency stop B
(Normally closed) has been OFF.
Overvoltage protection
of DC part
[200 V class] Voltage of the DC part exceeds 400 V.
[400 V class] Voltage of the DC part exceeds 800 V.
Overload protection
An effective value of AC current exceeds a 150 % of the rated
current for 60 seconds.
Current sensor
failure
Current sensor fails.
Startup stall
It starts when the converter cannot operate in ten seconds after
an operation command is input.
Low voltage
(power failure)
[200 V class] DC voltage drop less than or equal to 180 V while
the converter is running.
[400 V class] DC voltage becomes less than or equal to 360 V while
the converter is running.
or
AC power supply is in an abnormal state.
[200 V class]AC voltage becomes less than or equal to 140 Vrms while
the converter is running.
[400 V class] AC voltage becomes less than or equal to 280 Vrms
while the converter is running.
or
The current control error is 10 % and the operation command is ON.
or
It starts when the phase deviation is large (PWM sine wave mode:
18
°
or more, 120-degree conduction mode: 36
°
or more)
Unit overheat
protection
Temperature of IGBT becomes more than or equal to a specified
value.
Memory failure
Setting data stored in the built-in memory cannot be obtained
correctly.
Optional board error
A connected optional board malfunctions while the use of optional
board: J-00 is enabled.
Communication timeout
error
A communication error (timeout) occurs between the optional board
and the communication master while the network communication
option is used.
FCL operation
The high-speed current limit protection (FCL) lasts for ten
seconds.
Setting error
The operation is started while an error occurs in the setting such