Causes And Corrective Actions - Mitsubishi Electric F700 Instruction Manual

4.2 Causes and corrective actions

(1) Error Message
A message regarding operational troubles is displayed. Output is not shutoff.
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
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 page 139.)
2. Check the settings of Pr. 31 to 36 (frequency jump). (Refer to page 63.)
Check point
3. Check the settings of Pr. 100 to Pr. 109 (Adjustable 5 points V/F). (Refer to page 66.)
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 operation status in any operation mode) is set in Pr. 77 and the STF (STR) is on.
1. Check the Pr. 77 setting. (Refer to page 139.)
Check point
2. Check that the inverter is not operating.
1. Set "2" in Pr. 72.
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 page 129.)
Operation Panel
Indication
Name
Mode designation error
Description You attempted to make parameter setting in the NET operation mode when Pr. 77 is not "2".
1. Check that operation mode is "PU operation mode".
Check point
2. Check the Pr. 77 setting. (Refer to page 139.)
1. After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to
Corrective action
2. After setting "2" in Pr. 72, make parameter setting.
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 222.)
Corrective action
· Check for an operation panel (FR-DU07) failure. Please contact your sales representative.
HOLD
for 2s to release lock.
Er1
disable parameter write.
Er2
Er3
Er4
page 139.)
rE1

Causes and corrective actions

is made invalid. (Refer to page 219.)
-- -- - -- -- - -- --
-- -- - -- -- - -- -- 4
229