Causes And Corrective Actions - Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual

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
Write disable error
1. You attempted to make parameter setting when Pr. 77 Parameter write selection has been set to disable
Description
2. Frequency jump setting range overlapped.
3. Adjustable 5 points V/F settings overlapped
4. The PU and inverter cannot make normal communication
1. Check the setting of Pr. 77 Parameter write selection (Refer to
2. Check the settings of Pr. 31 to 36 (frequency jump). (Refer to
Check point
3. Check the settings of Pr. 100 to Pr. 109 (Adjustable 5 points V/F). (Refer to
4. Check the connection of the PU and inverter.
Operation Panel
Indication
Name Write error during operation
When parameter write 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.
1. Check the Pr. 77 setting. (Refer to
Check point
2. Check that the inverter is not operating.
1. Set "2" in Pr. 77.
Corrective action
2. After stopping 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
Operation Panel
Indication
Name
Mode designation error
· You attempted to make parameter setting in the NET operation mode when Pr. 77 is not "2".
Description
· If a parameter write was performed when the command source is not at the operation panel (FR-
1. Check that operation mode is "PU operation mode".
Check point
2. Check the Pr. 77 setting. (Refer to
3. Check the Pr. 551 setting.
1. After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to page
Corrective action
2. After setting "2" in Pr. 77, make parameter setting.
3. Set Pr.551 = "2 (initial setting)". (Refer to
Operation Panel
Indication
Name
Parameter read error
Description
An error occurred in the EEPROM on the operation panel side during parameter copy reading.
Check point
· Make parameter copy again. (Refer to page 253.)
Corrective action
· Check for an operation panel (FR-DU07) failure. Please contact your sales representative.
260
HOLD
for 2s to release lock.
Er1
parameter write.
Er2
Er3
Er4
DU07).
174.)
rE1
is invalid. (Refer to page 250.)
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page 174.)
page 83.)
page 174.)
page 174.)
page 186.)
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page 87.)
page 167.)