Mitsubishi Electric FR-B-750 to 75K Instruction Manual page 283

Causes and corrective actions
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
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
274
E. 1 to
E. 3
Option alarm
Stops the inverter output if a contact faullt or the like of the connector between the inverter and
communication option occurs or if a communication option is fitted to the connector 1 or 2.
Appears when the switch for the manufacturer setting of the plug-in option is changed.
1. Check that the plug-in option is plugged into the connector securely.
(1 to 3 indicate the option connector numbers.)
2. Check for excess electrical noises around the inverter.
3. Check that the communication option is not fitted to the connector 1 or 2.
1. Connect the plug-in option securely.
2. Take measures against noises if there are devices producing excess electrical noises around the inverter.
If the problem still persists after taking the above measure, please contact your sales representative
or distributor.
3. Fit the communication option to the connector 3.
4. Return the switch for the manufacturer setting of the plug-in option to the initial status. (Refer to
instruction manual of each option)
E.PE
Parameter storage device alarm (control circuit board)
A fault occurred in parameters stored (EEPROM failure)
Check for too many number of parameter write times.
Please contact your sales representative.
When performing parameter write frequently for communication purposes, set "1" in Pr. 342 to enable
RAM write. Note that powering off returns the inverter to the status before RAM write.
E.PE2
Parameter storage device alarm (main circuit board)
A fault occurred in parameters stored (EEPROM failure)
——————
Please contact your sales representative.
E.PUE
PU disconnection
This function stops the inverter output if communication between the inverter and PU is suspended,
e.g. the operation panel and parameter unit 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 when
communication errors occurred consecutively for more than permissible number of retries when a
value other than "9999" is set in Pr. 121 Number of PU communication retries during the RS-485
communication with the PU connector. This function also stops the inverter output if communication is
broken for the period of time set in Pr. 122 PU communication check time interval.
· Check that the FR-DU07 or parameter unit (FR-PU04/FR-PU07) is fitted tightly.
· Check the Pr. 75 setting.
Fit the FR-DU07 or parameter unit (FR-PU04/FR-PU07) securely.
E.RET
Retry count excess
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.
to
FR-PU04
Fault 1 to Fault 3
FR-PU07
FR-PU04
Corrupt Memry
FR-PU07
FR-PU04 Fault 14
FR-PU07 PR storage alarm
FR-PU04
PU Leave Out
FR-PU07
FR-PU04
Retry No Over
FR-PU07