Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 762

Operation panel
E.PCH
indication
Name Pre-charge fault
The inverter output is shut off when the pre-charge time exceeds Pr.764 Pre-charge time limit. The inverter
output is shut off when the measured value exceeds Pr.763 Pre-charge upper detection level during pre-
Description
charging. This function is available when Pr.764 and Pr.763 are set (refer to
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 point
• Check that thePr.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.
Corrective action
• Set the Pr.127 setting higher.
• Check the connection to the pump.
Operation panel
E.PID
indication
Name PID signal fault
The inverter output is shut off 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
Description
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
• Check the meter for a failure or break.
Check point
• Check that the parameter settings are correct.
• Check that the meter has no failure or break.
Corrective action
• Set the parameters correctly.
Operation panel
E. 1 to E. 3
indication
Name Option fault
• The inverter output is shut off 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.
Description • For the FR-A800-GF, the inverter output is shut off when a connector contact fault or the like occurs between
the CC-Link IE Field network communication circuit board and the inverter control circuit board.
• 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 securely. (1 to 3 indicate connector numbers for
connection of options.)
• For the FR-A800-GF, check that the CC-Link IE Field Network communication circuit board is securely installed
Check point
to the connector of the inverter control circuit board.
• 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.
• Connect the CC-Link IE Field Network communication circuit board of the FR-A800-GF securely.
• Take measures against noises if there are devices producing excessive electrical noises around the inverter.
Corrective action If the problem still persists after taking the above measure, 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.)
Operation panel
indication
Sensorless Sensorless Sensorless
Name Opposite rotation deceleration fault
The speed may not decelerate during low speed operation if the rotation direction of the speed command and
the estimated speed differ when the rotation is changing from forward to reverse or from reverse to forward
Description during torque control under Real sensorless vector control. The inverter output is shut off when overload occurs
due to the un-switched rotation direction. This protective function is not available in the initial status (V/F control).
(This function is only available under Real sensorless vector control.)
• Check that the rotation direction is not switched from forward to reverse rotation (or from reverse to forward)
Check point
during torque control under Real sensorless vector control.
• Prevent the motor from switching the rotation direction from forward to reverse (or from reverse to forward)
Corrective action during torque control under Real sensorless vector control.
• Contact your sales representative.
page 570.) This protective function is not available in the initial status.
E.11
FR-LU08 indication Pre-charge fault
page
FR-LU08 indication PID signal fault
to
FR-LU08 indication Fault 1 to Fault 3
FR-LU08 indication Opst rot dtct fault
6.5 Causes and corrective actions
587). This protective function
6. PROTECTIVE FUNCTIONS
1
2
3
4
5
6
7
8
9
10
763