Mitsubishi Electric FR-A820-00046 Instruction Manual page 914

Causes and corrective actions
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
6 - 26
E.PTC
PTC thermistor operation
The inverter trips if resistance of the PTC thermistor connected between the terminal 2 and
terminal 10 is equal to or higher than the Pr. 561 "PTC thermistor protection level" setting for a
continuous time equal to or longer than the setting value in Pr. 1016 "PTC thermistor protection
detection time". When the initial value (Pr. 561 = "9999") is set, this protective function is not
available.
Check the connection with the PTC thermistor.
Check the Pr. 561 and Pr. 1016 settings.
Check the motor for operation under overload.
Reduce the load.
E.OPT
Option fault
Appears when the AC power supply is connected to the terminal R/L1, S/L2, or T/L3
accidentally when a high power factor converter (FR-HC2) or power regeneration common
converter (FR-CV) is connected (when Pr. 30 "Regenerative function selection" = "2").
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 either one of a plug-in option (FR-A8AP or FR-A8APR) or a control terminal
option (FRA8TP) is not installed.
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 AC power supply is not connected to the terminal R/L1, S/L2, or T/L3 when a
high power factor converter (FR-HC2) or power regeneration common converter (FR-CV) is
connected (when Pr. 30 = "2").
Check that the plug-in option for torque command setting is connected.
Check that the plug-in option (FR-A8AP or FR-A8APR) and the control terminal option
(FR-A8TP) are installed correctly. Check that the settings of Pr. 393 "Orientation selection"
and Pr. 862 "Encoder option selection" are correct.
Check for the password lock with a setting of Pr. 296 = "0, 100".
Check the Pr. 30 setting and wiring.
The inverter may be damaged if the AC power supply is connected to the terminal R/L1, S/L2,
or T/L3 when a high power factor converter is connected. Please contact your sales
representative.
Check for connection of the plug-in option. Check the Pr. 804 setting.
Install the plug-in option (FR-A8AP or FR-A8APR) and the control terminal option (FR-A8TP)
are installed correctly. Set Pr. 393 "Orientation selection" and Pr. 862 "Encoder option
selection" correctly.
Set the switch on the plug-in option, which is for manufacturer setting, back to the initial
setting. (Refer to the Instruction Manual of each option.)
To apply the password lock when installing a communication option, set Pr. 296 ≠ "0, 100".
(Refer to page 5-207.)
Protective functions
FR-LU-08 PTC thermistor oper
FR-LU-08 Option Fault