Mitsubishi Electric FR-A820-00046 Instruction Manual page 922

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
Operation panel
indication
Name
Description
Check point
Corrective action
6 - 34
E.IAH
Abnormal internal temperature (IP55 compatible models only)
The inverter trips when the inverter internal temperature reaches the specified value or higher.
Check for too high surrounding air temperature.
Check if the internal air circulation fan or the cooling fan stops due to a fault.
Install an inverter suitable for the installation environment. (Refer to the Instruction Manual
(Hardware) of the FR-A806.)
Replace the internal air circulation fan or the cooling fan.
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 5-399.) 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 5-524.) 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-LU-08 Abnormal Intnl Temp
FR-LU-08 Lost mA Input
FR-LU-08 Precharge Error
FR-LU-08 PID Signal Error