Mitsubishi Electric 800 Series Instruction Manual page 585

Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
Abbreviation
Name
Description
Check point
Corrective action
584
6. PROTECTIVE FUNCTIONS
6.4 Causes and corrective actions
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
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
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 440.)
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.
E. 1 to E. 3
Option fault
The inverter trips when a contact fault is found between the inverter and the plug-in option, or when the
communication option is not connected to the connector 1.
Appears when the switch for manufacturer setting of the plug-in option is changed.
• Check that the plug-in option is plugged into the connector properly. (1 to 3 indicate connector numbers for
connection of options.)
• Check for excessive noise around the inverter.
• Check if the communication option is connected to the connector 2 or 3.
• Connect the plug-in option securely.
• Take measures against noises if there are devices producing excess electrical noises around the inverter.
If the situation does not improve after taking the above measure, please contact your sales representative.
• Connect the communication option to the connector 1.
• Set the switch on the plug-in option, which is for manufacturer setting, back to the initial setting. (Refer to
the Instruction Manual of each option.)
FR-LU08 4 mA input fault
FR-PU07 Lost mA Input
FR-LU08 Pre-charge fault
FR-PU07 Precharge Error
FR-LU08 PID signal fault
FR-PU07 PID Signal Error
page 396.)
FR-LU08 Fault 1 to Fault 3
FR-PU07
page 338.) This