Mitsubishi Electronics FR-A500 ユーザーズマニュアル
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(2) Alarm and measures
1) The inverter operates as follows at alarm occurrences
2) Measures at alarm occurrences
When alarms other than the above are displayed, refer to the inverter instruction manual and remove the
cause of the alarm.
(3) Inverter reset
Which resetting method is allowed or not allowed in each operation mode is described below.
Fault Location
Status
Operation Mode
PU operation
External operation
Network operation
Inverter alarm
Inverter operation
Inverter trip
Inverter trip
Inverter trip
Data communication
Continued
Continued
Continued
Communication
line alarm
line alarm
Inverter operation
Continued
Continued
Inverter trip (Depends on
the Pr.502 setting)
the Pr.502 setting)
Data communication
Stop
Stop
Stop
Option itself
Communication
option
connection fault
option
connection fault
Inverter operation
Inverter trip
(Depends on the
Pr.502 setting)
(Depends on the
Pr.502 setting)
Inverter trip (Depends
on the Pr.502 setting)
on the Pr.502 setting)
Inverter trip (Depends on
the Pr.502 setting)
the Pr.502 setting)
Data communication
Continued
Continued
Continued
Option alarm
Inverter operation
Continued
Continued
Inverter trip (Depends on
the Pr.502 setting)
the Pr.502 setting)
Data communication
Stop
Stop
Stop
Alarm Indication
Alarm Definition
Measures
E. OP3
Communication line alarm
Check the LED states of the option unit and remove the
cause of the alarm. (Refer to the instruction manual of
each option unit for the LED indication status) Check the
master.
cause of the alarm. (Refer to the instruction manual of
each option unit for the LED indication status) Check the
master.
E. 3
Option alarm
Check the connection between the inverter and option
unit for poor contact, etc. and remove the cause of the
alarm.
unit for poor contact, etc. and remove the cause of the
alarm.
Resulting Method
Operation Mode
Network operation
External operation
PU operation
Master
Inverter reset
(depend on the Pr. 75 setting)
(depend on the Pr. 75 setting)
Allowed
Disallowed
Disallowed
Error reset at an inverter fault
Refer to the instruction manual of each communication option.
Connect terminals RES-SD
Allowed
Allowed
Allowed
Switch off inverter power
Allowed
Allowed
Allowed
REMARKS
1. When a communication line fault has occurred, reset cannot be made from the master.
2. The inverter is set to the external operation mode if it has been reset in the network operation mode.To resume the
2. The inverter is set to the external operation mode if it has been reset in the network operation mode.To resume the
network operation, the operation mode must be switched to the network operation again. (When any of "1, 2, 10, 12" is
set in Pr. 340 "link startup mode selection", this switchover is not needed.)
set in Pr. 340 "link startup mode selection", this switchover is not needed.)
3. Communication stops for about 1s during an inverter reset.