PROTECTIVE FUNCTIONS
168
Operation Panel Indication
E. 3
FR-PU04
Fault 3
Name
Option fault
Description
Also stops the inverter output if the dedicated option used in
the inverter results in setting error or connection (connector)
fault.
Check point
•
Check that the function setting and operation of the option
are correct.
•
Check that the communication option is plugged in the
connector securely.
Corrective action
•
Connect the communication option securely.
•
Contact your sales representative.
E. 6
Fault 6
Operation Panel Indication
E. 7
FR-PU04
Fault 7
Name
CPU error
Description
This function stops the inverter output if a communication
error occurs in the built-in CPU.
Check point
Corrective action
Please contact your sales representative.
Operation Panel Indication
E. LF
FR-PU04
E. LF
Name
Output phase failure protection
Description
This function stops the inverter output if one of the three
phases (U, V, W) on the inverter's output side (load side)
results in open phase.
Check point
•
Check the wiring (Check the motor for a fault.)
•
Check that the capacity of the used motor is not smaller
than the inverter capacity.
Corrective action
•
Wire the cables properly.
•
Check the setting of Pr. 251 "output phase failure protection
selection".
(2) Minor fault
The output is not shut off when the protective function is activated. You can make
parameter setting to output the minor fault signal. (Set "98" in any of Pr. 190 to Pr. 192
(output terminal function selection). Refer to page 150.)
Operation Panel Indication
FN
FR-PU04
Fan Failure
Name
Fan fault
Description
For the inverter which contains a cooling fan, FN appears on
the operation panel when the cooling fan stops due to a fault
or operates differently from the setting of Pr. 244 "cooling fan
operation selection".
Check point
Check the cooling fan for a fault.
Corrective action
Change the fan.
5