Mitsubishi FR-D740-1.5K

98
Causes and corrective actions
4.3 Causes and corrective actions
(1) 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 mode is set. Operation other than is invalid. (Refer to page 35)
Check point -------- ------
Corrective action
Press for 2s to release lock.
Operation panel
indication
LOCd
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
Chapter 4 of the Instruction Manual (Applied)).
Operation panel
indication
Er1
Name
Write disable error
Description
1. You attempted to make parameter setting when Pr. 77 Parameter write selection has been set to disable parameter write.
2. Frequency jump setting range overlapped.
3. The PU and inverter cannot make normal communication.
Check point
1. Check the setting of Pr. 77 Parameter write selection. ( Refer to Chapter 4 of the Instruction Manual (Applied)).
2. Check the settings of Pr. 31 to Pr. 36 (frequency jump). ( Refer to Chapter 4 of the Instruction Manual (Applied))
3. Check the connection of the PU and inverter.
Operation panel
indication
Er2
Name
Write error during operation
Description
When parameter write was performed during operation with a value other than "2" (writing is enabled independently
of operation status in any operation mode) is set in Pr. 77 and the STF (STR) is ON.
Check point
1. Check the Pr. 77 setting. ( Refer to Chapter 4 of the Instruction Manual (Applied)).
2. Check that the inverter is not operating.
Corrective action
1. Set "2" in Pr. 77.
2. After stopping operation, make parameter setting.
Operation panel
indication
Er3
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 Chapter 4 of the Instruction Manual (Applied)).
Operation panel
indication
Er4
Name
Mode designation error
Description
 Appears if a parameter setting is attempted in the External or NET operation mode with Pr. 77 ≠ "2".
 Appears if a parameter setting is attempted when the command source is not at the operation panel.
Check point
1. Check that operation mode is PU operation mode.
2. Check the Pr. 77 setting. ( Refer to Chapter 4 of the Instruction Manual (Applied)).
3. Check if a parameter unit (FR-PU04/FR-PU07) is connected when Pr. 551 = "9999 (initial setting)."
4. Check the Pr. 551 setting.
Corrective action
1. After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to page 47)
2. After setting Pr. 77 = "2", make parameter setting.
3. Disconnect the parameter unit (FR-PU04/FR-PU07), and make parameter setting.
4. After setting Pr. 551 = "4", make parameter setting. ( Refer to Chapter 4 of the Instruction Manual (Applied)).