Protective and Diagnostic Functions
7-5
External fault (Input terminal 3)
An "external fault" was input from a
multi-function input terminal (S3 to
S7).
Remove the cause of the external
fault.
External fault (Input terminal 4)
External fault (Input terminal 5)
External fault (Input terminal 6)
External fault (Input terminal 7)
Digital Operator Connection Fault
The connection to the Digital Operator
was broken during operation using the
operator as RUN command source.
–
Check the connection to the Digi-
tal Operator.
MEMOBUS Communications Error
A normal receive was not possible for
2 s or longer after control data were
received once.
–
Check the communications
devices and communications sig-
nals.
Option Communications Error
A communications error was detected
during a run command or while setting
a frequency reference from a Commu-
nications Option Card.
–
Check the communications
devices and communications sig-
nals.
Digital Operator Communications
Error 1
Communications with the Digital
Operator were not established within 5
seconds after the power was turned
on.
The Digital Operator's connector isn't
connected properly.
Disconnect the Digital Operator
and then connect it again.
The Inverter's control circuits are
faulty.
Replace the Inverter.
CPU External RAM Fault
–
Try turning the power supply off
and on again.
The control circuits were destroyed. Replace the Inverter.
Digital Operator Communications
Error 2
After communications were estab-
lished, there was a communications
error with the Digital Operator for
more than 2 seconds.
The Digital Operator isn't connected
properly.
Disconnect the Digital Operator
and then connect it again.
The Inverter's control circuits are
faulty.
Replace the Inverter.
Baseblock circuit error
–
Try turning the power supply off
and on again.
The control circuit is damaged. Replace the Inverter.
EEPROM error
–
Try turning the power supply off
and on again.
The control circuit is damaged. Replace the Inverter.
CPU internal A/D converter error
–
Try turning the power supply off
and on again.
The control circuit is damaged. Replace the Inverter.
Table 7.1 Fault Displays and Processing (Continued)
Display Meaning Probable Causes Corrective Actions
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