Mitsubishi Electric FR-F500 Instruction Manual page 181

Operation Panel
E.PUE
Indication
Name Parameter unit disconnection
This function stops the inverter output if communication between the inverter and
PU is suspended, e.g. the operation panel or PU is disconnected, when "2", "3", "16"
or "17" was set in Pr. 75 "reset selection/disconnected PU detection/PU stop
Description selection". This function stops the inverter output if the number of successive
communication errors is greater than the permissible number of retries when the Pr.
121 value is "9999" for RS-485 communication from the PU connector. This function
stops the inverter output if communication is broken for the time set in Pr. 122.
• Check for loose fitting of the DU or PU.
Check point
• Check the Pr. 75 setting.
Corrective action Fit the DU and PU securely.
Operation Panel
E.RET
Indication
Retry count exceeded
Name
If operation cannot be resumed properly within the number of retries set, this
Description
function stops the inverter output.
Check point Find the cause of alarm occurrence.
Corrective action Eliminate the cause of the error preceding this error indication.
Operation Panel
E.LF
Indication
Name Output phase failure protection
This function stops the inverter output if one of the three phases (U, V, W) on the
Description
inverter's output side (load side) results in open phase.
Check point Check the wiring (Check the motor for a fault.)
• Wire the cables properly.
Corrective action
Operation Panel
E.CPU
Indication
Name CPU error
If the arithmetic operation of the built-in CPU does not end within a predetermined
Description
period, the inverter self-determines it as an alarm and stops the output.
Check point
• Make connection securely.
Corrective action
Operation Panel
E. 6
Indication
Name CPU error
If the arithmetic operation of the peripheral circuit of the built-in CPU does not end
Description within a predetermined period, the inverter self-determines it as an alarm and stops
the output.
Check point Check for a loose connector.
• Make connection securely.
Corrective action
PROTECTIVE FUNCTIONS
FR-PU04
FR-PU04
FR-PU04
FR-PU04

FR-PU04
160
PU Leave Out
Retry No Over

CPU Fault
Error 6
5