YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 252

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