Mitsubishi FR-E520-0.1K-NA - Page 187

PROTECTIVE FUNCTIONS
171
Operation Panel Indication
E. RET
FR-PU04
Retry No Over
Name
Retry count exceeded
Description
If operation cannot be resumed properly within the number of
retries set, this function stops the inverter output.
Check point
Find the cause of alarm occurrence.
Corrective action
Eliminate the cause of the error precedin
g
this error
indication.
Operation Panel Indication
E. CPU
FR-PU04
CPU Fault
Name
CPU error
Description
If the arithmetic operation of the built-in CPU does not end
within a predetermined period, the inverter self-determines it
as an alarm and stops the output.
Check point 
Corrective action
Please 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. (400V class only)
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 capacit
y
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 coolin
g
fan, FN appears on
the operation panel when the coolin
g
fan stops due to a fault
or operates differentl
y
from the settin
g
of Pr. 244 "coolin
g
fan
operation selection".
Check point
Check the cooling fan for a fault.
Corrective action
Change the fan.
5