131
9
9
TROUBLESHOOTING
If a fault occurs and the inverter fails to operate properly, locate the cause of the fault and take proper
corrective action by referring to the troubleshooting below. If the corresponding information is not found in
the table, the inverter has problem, or the component parts are damaged, contact your sales
representative.
Display
Possible Causes
Check Point
Corrective Action
Operation
panel of
inverter
ERR LED of
FR-A7NCA
0.00
Single flash
Network error such as
communication frame error
occurred.
•
Check that all cables are
connected properly.
•
Check that baud rate
setting is correct.
•
Check that the network
cable is properly
terminated.
•
Check for a cable
and connector.
•
Check for baud rate
setting.
•
Check for cable
termination.
0.00
On
Bus off occurrence
•
Check that all cables are
connected properly.
•
Check that baud rate
setting is correct.
•
Check that Network power
is on.
•
Check for a cable
and connector.
•
Check for baud rate
setting.
•
Check for the
Network power.
E.OP3
Double flash
Life Garding Event occurrence
(Remote request from the
master was not received within
Node Life Time.)
Check for Guard: Node Life
Time (Index 100Ch Guard
Time
×
Index 100Dh Life Time
Factor).
Send remote request
within Node Life Time
(Guard Time
×
Life
Time Factor).
A7NCA.book 131 ページ 2006年7月3日 月曜日 午前9時48分