Mitsubishi Electric 800 Series Instruction Manual page 28

 External thermal relay operation
Operation panel
indication
Description
Check point
Corrective action
 Option fault
Operation panel
indication
Description
Check point
Corrective action
Reference
 Communication option fault
Operation panel
indication
Description
Check point
Corrective action
 User definition error by the PLC function
Operation panel
indication
Description
Check point
Corrective action
Reference
 Parameter storage device fault (control circuit board)
Operation panel
indication
Description
Check point
Corrective action
Reference
28
2. Protective Functions
2.5 Causes and corrective actions
E.OHT
The inverter output is shut off if the external thermal relay provided for motor overheat protection or the internally
mounted thermal relay in the motor, etc. switches ON (contacts open). This function is available when "7" (OH
signal) is set in any of Pr.178 to Pr.184 (Input terminal function selection). This protective function is not
available in the initial status. (OH signal is not assigned.) (This protective function is available for the standard
model and the Ethernet model.)
• Check for motor overheating.
• Check that the value "7" (OH signal) is set correctly to any of Pr.178 to Pr.184 (Input terminal function
selection).
• Reduce the load and operation duty.
• Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.
E.OPT
• Appears when torque command by the plug-in option is selected using Pr.804 Torque command source
selection and no plug-in option is mounted. This function is available under torque control.
• Appears when the switch for manufacturer setting of the plug-in option is changed.
• Appears when a communication option is connected while Pr.296 Password lock level = "0 or 100".
• Check that the plug-in option for torque command setting is connected.
• Check for the password lock with a setting of Pr.296 = "0, 100".
• Check for connection of the plug-in option. Check the Pr.804 setting.
• Set the switch on the plug-in option, which is for manufacturer setting, back to the initial setting.
• To apply the password lock when installing a communication option, set Pr.296 ≠ "0, 100".
• FR-E800 Instruction Manual (Function)
• Instruction Manual of each option
E.OP1
• The inverter output is shut off if a communication line error occurs in the communication option.
• Check for an incorrect option function setting and operation.
• Check that the plug-in option is plugged into the connector securely.
• Check for a break in the communication cable.
• Check that the terminating resistor is fitted properly.
• Check the option function setting, etc.
• Connect the plug-in option securely.
• Check the connection of communication cable.
• If the fault occurs again when the inverter is reset, contact your sales representative.
E.16 to E.20
The protective function is activated by setting "16 to 20" in the special register SD1214 for the PLC function. The
inverter output is shut off when the protective function is activated.
The protective function is activated when the PLC function is enabled. This protective function is not available in
the initial setting (Pr.414 = "0").
• Check if "16 to 20" is set in the special register SD1214.
• Set a value other than "16 to 20" in the special register SD1214.
FR-E800 Instruction Manual (Function)
E.PE
The inverter output is shut off if a fault occurs in the parameter stored. (EEPROM failure)
Check for too many number of parameter write times.
Contact your sales representative.
Set "1" in Pr.342 Communication EEPROM write selection (write to RAM) for the operation which requires
frequent parameter writing via communication, etc. Note that writing to RAM goes back to the initial status at
power OFF.
FR-E800 Instruction Manual (Function)
FR-LU08 indication Ext TH relay oper
FR-LU08 indication Option Fault
FR-LU08 indication Option1 Fault
to
FR-LU08 indication Fault 16 to Fault 20
FR-LU08 indication Corrupt Memory