Causes And Corrective Actions - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

6.5

Causes and corrective actions

 Error message
A message regarding operational troubles is displayed. Output is not shut off.
Operation panel
indication
Name Operation panel lock
Description
Operation lock is set. Operation other than
Check point
Corrective action
Press
Operation panel
indication
Name Password locked
Description Password function is active. Display and setting of parameters are restricted.
Check point
Enter the password in Pr.297 Password lock/unlock to unlock the password function before operating. (Refer to
Corrective action
page
Operation panel
indication
Name Write disable error
• 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.
Description • 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 PWM frequency selection = "25".
• Check the Pr.77 setting. (Refer to
• Check the settings of Pr.31 to Pr.36 (frequency jump). (Refer to
Check point • Check the settings of Pr.100 to Pr.109 (adjustable 5 points V/F). (Refer to
• Check the connection of PU and the inverter.
• Check the Pr.72 setting. A sine wave filter cannot be used under PM sensorless vector control.
Operation panel
indication
Name Write error during operation
Description Parameter write was attempted while Pr.77 Parameter write selection = "0".
Check point • Check that the inverter is stopped.
• After stopping the operation, make parameter setting.
Corrective action
• When setting Pr.77 = "2", parameter write is enabled during operation. (Refer to
Operation panel
indication
Name Calibration error
Description Analog input bias and gain calibration values have been set too close.
Check point Check the settings of the calibration parameters C3, C4, C6, and C7 (calibration functions). (Refer to
Operation panel
indication
Name Mode designation error
• Parameter setting was attempted in the External or NET operation mode while Pr.77 Parameter write selection
Description = "1".
• Parameter write was attempted when the command source is not at the operation panel (FR-DU08).
• Check that the operation mode is the PU operation mode.
Check point
• Check that the Pr.551 PU mode operation command source selection setting is correct.
• After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to
Corrective action • When Pr.77 = "2", parameter write is enabled regardless of the operation mode. (Refer to
• Set Pr.551 = "2". (Refer to
HOLD
for 2 s to release the lock.
LOCD
331.)
Er1
page
Er2
Er3
Er4
page 380.)
is invalid. (Refer to page
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328.)
page 408.)
324.)
page 679.)
page 328.)
page 482.)
page 370.)
page 328.)
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
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