Mitsubishi FR-A800

Causes and corrective actions
PROTECTIVE FUNCTIONS
645
6 5
6.5 Causes and corrective actions
Error message
A message regarding operational troubles is displayed. Output is not shut off.
Operation panel
indication
HOLD
Name
Operation panel lock
Description
Operation lock is set. Operation other than is invalid. (Refer to page 263.)
Check point
————
Corrective action
Press for 2 s to release the lock.
Operation panel
indication
LOCD
Name
Password locked
Description
Password function is active. Display and setting of parameters are restricted.
Check point
————
Corrective action
Enter the password in Pr.297 Password lock/unlock to unlock the password function before
operating.(Refer to page 271.)
Operation panel
indication
Er1
Name
Parameter write error
Description
• Parameter setting was attempted while Pr.77 Parameter write selection is set to disable parameter write.
• Overlapping range has been set for the frequency jump.
• Overlapping range has been set for the adjustable 5 points V/F.
• The PU and inverter cannot make normal communication.
• IPM parameter initialization was attempted while Pr.72 = "25".
Check point
• Check the Pr.77 Parameter write selection setting. (Refer to page 267.)
• Check the settings of Pr.31 to Pr.36 (frequency jump). (Refer to page 346.)
• Check the settings of Pr.100 to Pr.109 (adjustable 5 points V/F). (Refer to page 603.)
• Check the connection of PU and the inverter.
• Check the Pr.72 PWM frequency selection setting. A sine wave filter cannot be used under PM sensorless
vector control.
Operation panel
indication
Er2
Name
Write error during operation
Description
Parameter write was attempted while Pr.77 = "0".
Check point
• Check that the inverter is stopped.
Corrective action
• After stopping the operation, make parameter setting.
• When setting Pr.77 = "2", parameter write is enabled during operation. (Refer to page 267.)
Operation panel
indication
Er3
Name
Calibration error
Description
Analog input bias and gain calibration values have been set too close.
Check point
Check the settings of calibration parameters C3, C4, C6 and C7 (calibration functions). (Refer to page
415.)
Operation panel
indication
Er4
Name
Mode designation error
Description
• Parameter setting was attempted in the External or NET operation mode while Pr.77 = "1".
• Parameter write was attempted when the command source is not at the operation panel (FR-DU08).
Check point
• Check that operation mode is PU operation mode.
• Check that the Pr.551 setting is correct.
Corrective action
• After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to page 306.)
• When Pr.77 = "2", parameter write is enabled regardless of the operation mode. (Refer to page 267.)
•Set Pr.551 = "2". (Refer to page 316.)