Mitsubishi Electric 800 Series Instruction Manual page 647

Causes and corrective actions
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
Abbreviation
Name
Description
Check point
Corrective action
646
PROTECTIVE FUNCTIONS
E.MP
Vector Vector Vector
Magnetic pole position unknown
When the offset value between the PM motor home magnetic pole position and the home position of the
encoder (position detector) is unknown, the protective circuit is activated to stop the inverter output.
• Check that the encoder position tuning was performed.
• Check that the encoder position tuning ended properly. When Pr.1105 Encoder magnetic pole position
offset = "9999", the encoder position tuning does not end properly.
• Perform encoder position tuning with Pr.373 Resolver position tuning setting/status. (Refer to the
Instruction Manual of the encoder option.)
• Remove the cause of the tuning error, and perform tuning again. (Refer to the Instruction Manual of the
encoder option.)
E.EF
External fault during output operation
When the X32 signal turns OFF (the contact opens) due to an external fault or other factor, the inverter output
is shut off. This function is available when "32" is set in any of Pr.178 to Pr.189 (Input terminal function
selection). This protective function is not available in the initial status (X32 signal is not assigned).
• Check that the X32 signal is OFF.
• Make sure that there is no problem in starting operation, and turn ON the X32 signal.
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
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
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.
FR-LU08 —
FR-LU08 Fault
FR-LU08 Lost mA Input
FR-PU07 Fault
FR-LU08 Precharge Error
FR-PU07 Fault
FR-LU08
PID Signal Error
FR-PU07
page 488.) This protective function is not available in the initial
page 411.)