Mitsubishi Electric FR-F500 Series Instruction Manual page 185

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 selection". This function stops the inverter output if the number of
Description
successive communication errors is greater than the permissible number of
retries when the Pr. 121 value is other than "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
Name Retry count exceeded
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.CPU
Indication
Name CPU error
If the arithmetic operation of the built-in CPU does not end within a
Description
predetermined period, the inverter self-determines it as an alarm and stops the
output.
Check point
• Make connection securely.
Corrective action
Operation Panel
Indication
Name
Option fault
The inverter output is stopped if a contact fault occurs at the connector between
Description the inverter and communication option, a fault of the communication option
itself, etc. occurs.
• Check that the communication option is plugged in the connector securely.
Check point
• Check for excess noises around the inverter.
• Take measures against noises if there are devices producing excess noises
Corrective action
• Contact your sales representative.
E. 3
(3 indicate the option slot numbers.)
around the inverter.
171
PROTECTIVE FUNCTIONS
FR-PU04
FR-PU04
FR-PU04

FR-PU04
PU Leave Out
Retry No Over
CPU Fault
Fault 3
5