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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
HOLD
Name
Operation panel lock
Description
Operation lock mode is set. Operation other than is made invalid. (Refer to page 383.)
Check point
-------- ------
Corrective action
Press for 2s to release lock.
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. Adjustable 5 points V/F settings overlapped
4. The PU and inverter cannot make normal communication
Check point
1. Check the setting of Pr. 77 Parameter write selection (Refer to page 298.)
2. Check the settings of Pr. 31 to 36 (frequency jump). (Refer to page 152.)
3. Check the settings of Pr. 100 to Pr. 109 (adjustable 5 points V/F). (Refer to page 159.)
4. 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 page 298.)
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
page 282
.)
Operation Panel
Indication
Er4
Name
Mode designation error
Description
You attempted to make parameter setting in the NET operation mode when Pr. 77 is not "2".
Check point
1. Check that operation mode is "PU operation mode".
2. Check the Pr. 77 setting. (Refer to page 298.)
Corrective action
1. After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to page
298.)
2. After setting "2" in Pr. 77, make parameter setting.
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