Mitsubishi Electric FR-F820-00077 Instruction Manual page 842

Causes and corrective actions
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
Operation panel
indication
Name
Description
Check point
Corrective action
6 - 30
E.LCI
4 mA input fault
The inverter trips when the analog input current is 2 mA or less for the time set in Pr. 778 "4 mA
input check filter". This function is available when Pr. 573 "4 mA input check selection" = "2 or 3".
(Refer to page 5-264.) This function is not available in the initial status.
Check for a break in the wiring for the analog current input.
Check that the Pr. 778 setting is not too short.
Check the wiring for the analog current input.
Set the Pr. 778 setting larger.
E.PCH
Pre-charge fault
The inverter trips when the pre-charge time exceeds Pr. 764 "Pre-charge time limit".
The inverter trips when the measured value exceeds Pr. 763 "Pre-charge upper detection
level" during pre-charging.
This function is available when Pr. 764 and Pr. 763 are set. This protective function is not
available in the initial status.
Check that the Pr. 764 setting is not too short.
Check that the Pr. 763 setting is not too small.
Check that the Pr. 127 "PID control automatic switchover frequency" setting is not too low.
Check for a break in the connection to the pump.
Set the Pr. 764 setting longer.
Set the Pr. 763 setting larger.
Set the Pr. 127 setting higher.
Check the connection to the pump.
E.PID
PID signal fault
The inverter trips if the measured value exceeds the PID upper limit or PID lower limit parameter
setting, or the absolute deviation value exceeds the PID deviation parameter setting during PID
control.
Set this function in Pr. 131 "PID upper limit", Pr. 132 "PID lower limit", Pr. 553 "PID deviation limit",
and Pr. 554 "PID signal operation selection". (Refer to page 5-353.)
The inverter trips when the input pressure reaches the fault level under PID input pressure
control. Use Pr. 1370 "Detection time for PID limiting operation" and Pr. 1379 "PID input pressure
fault level" to set the function. (Refer to page 5-404.)
This protective function is not available in the initial status.
Check the meter for a failure or break.
Check that the parameter settings are correct.
Check that the meter has no failure or break.
Set the parameters correctly.
Protective functions
FR-LU08 4 mA input fault
FR-LU08 Pre-charge fault
FR-LU08 PID signal fault