Mitsubishi Electric FR-D720S SC EC, Instruction Manual, Page: 441 / 512

Troubleshooting Causes and corrective actions
FR-D700 SC EC 7 - 5
Operation Panel
Indication
Er3
Name Calibration error
Description Analog input bias and gain calibration values are too close.
Corrective action Check the settings of C3, C4, C6 and C7 (calibration functions). (Refer to section 6.15.3.)
Operation Panel
Indication
Er4
Name Mode designation error
Description
You attempted to make parameter setting in the External or NET operation mode when
Pr. 77 is not "2".
You attempted to make parameter setting when the command source is not at the
operation panel.
Check point
Check that operation mode is "PU operation mode".
Check the Pr. 77 setting. (Refer to section 6.16.2.)
Check if a parameter unit (FR-PU04/FR-PU07) is connected when Pr. 551 = "9999“
(initial setting).
Check the Pr. 551 setting.
Corrective action
After setting the operation mode to the "PU operation mode", make parameter setting.
(Refer to section 6.16.2.)
After setting "2" in Pr. 72, make parameter setting.
Disconnect the parameter unit (FR-PU04/FR-PU07), and make parameter setting.
After setting Pr. 551 = "4", make parameter setting.
Operation Panel
Indication
Err.
Name Inverter reset
Description
Executing reset using RES signal, or reset command from communication or PU.
Displays at powering off.
Corrective action
Turn off the RES signal.