Causes And Corrective Actions - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

Fr-f700p series
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Causes and corrective actions

5.3 Causes and corrective actions

(1) Error Message
A message regarding operational troubles is displayed. Output is not shut off.
Operation Panel
Indication
Name
Operation panel lock
Description
Operation lock mode 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 parameter is restricted.
Check point
Corrective action
Enter the password in Pr. 297 Password lock/unlock to unlock the password function before operating. (Refer to page 203).
Operation Panel
Indication
Name
Write disable error
· You attempted to make parameter setting when Pr. 77 Parameter write selection has been set to disable
· Frequency jump setting range overlapped.
Description
· Adjustable 5 points V/F settings overlapped.
· The PU and inverter cannot make normal communication.
· Appears if IPM parameter initialization is attempted in the parameter setting mode while Pr.72 = "25."
· Check the setting of Pr. 77 Parameter write selection (Refer to page 200.)
· Check the settings of Pr. 31 to 36 (frequency jump). (Refer to page 97.)
· Check the settings of Pr. 100 to Pr. 109 (Adjustable 5 points V/F). (Refer to page 101.)
Check point
· Check the connection of the PU and inverter.
· Check the Pr.72 PWM frequency selection setting. A sine wave filter cannot be used under IPM motor
Operation Panel
Indication
Name
Write error during operation
When parameter writing was performed during operation with a value other than "2" (writing is enabled
Description
independently of operating status in any operation mode) is set in Pr. 77 and the STF (STR) is ON.
· Check the Pr. 77 setting. (Refer to page 200.)
Check point
· Check that the inverter is not operating.
· Set "2" in Pr. 77.
Corrective action
· After stopping the operation, make parameter setting.
Operation Panel
Indication
Name
Calibration error
Description
Analog input bias and gain calibration values are too close.
Check point
Check the settings of C3, C4, C6 and C7 (calibration functions). (Refer to page 193.)
310
HOLD
for 2s to release lock.
LOCd
Er1
parameter writing.
control.
Er2
Er3
is invalid. (Refer to page 298.)
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