Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 647 / 727

Causes and corrective actions
646
PROTECTIVE FUNCTIONS
Abbreviation
E.MP
FR-LU08 —
Name
Magnetic pole position unknown
Description
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 point
• 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.
Corrective action
• 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.)
Abbreviation E.EF FR-LU08 Fault
Name
External fault during output operation
Description
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 point • Check that the X32 signal is OFF.
Corrective action
• Make sure that there is no problem in starting operation, and turn ON the X32 signal.
Abbreviation E.LCI
FR-LU08 Lost mA Input
FR-PU07 Fault
Name
4 mA input fault
Description
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 411 .)
This function is not available in the initial status.
Check point
• Check for a break in the wiring for the analog current input.
• Check that the
Pr.778 setting is not too short.
Corrective action
• Check the wiring for the analog current input.
• Set the
Pr.778 setting larger.
Abbreviation E.PCH
FR-LU08 Precharge Error
FR-PU07 Fault
Name
Pre-charge fault
Description
• 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 point
• 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.
Corrective action
• Set the Pr.764 setting longer.
• Set the Pr.763 setting larger.
• Set the Pr.127 setting higher.
• Check the connection to the pump.
Abbreviation E.PID
FR-LU08
FR-PU07
PID Signal Error
Name
PID signal fault
Description
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 488 .) This protective function is not available in the initial
status.
Check point
• Check the meter for a failure or break.
• Check that the parameter settings are correct.
Corrective action
• Check that the meter has no failure or break.
• Set the parameters correctly.
Vector Vector Vector