Mitsubishi Electric FR-E500 Instruction Manual page 184

Operation Panel Indication
Name
Description
Check point
Corrective action
Operation Panel Indication
Name
Description
Check point
Corrective action
Operation Panel Indication
Name
Description
Check point
Corrective action
(2) Minor fault
Operation Panel Indication
Name
Description
Check point
Corrective action
E. RET
Retry count exceeded
If operation cannot be resumed properly within the number of
retries set, this function stops the inverter output.
Find the cause of alarm occurrence.
Eliminate the cause of the error preceding this error
indication.
E. CPU
CPU error
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.
Please contact your sales representative.
E. LF
Output phase failure protection
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 the wiring (Check the motor for a fault.)
Wire the cables properly.
FN
Fan fault
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 the cooling fan for a fault.
Change the fan.
168
PROTECTIVE FUNCTIONS
FR-PU04 Retry No Over
FR-PU04
CPU Fault

FR-PU04 E. LF
FR-PU04 Fan Failure
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