Mitsubishi Electric FR-A800 Series Instruction Manual page 799

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
798
6. PROTECTIVE FUNCTIONS
6.5 Causes and corrective actions
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E.PCH
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-
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 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 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
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 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 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.
• 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.
• The inverter output is shut off when encoder feedback control is performed while 10 poles or more is set in
Pr.144 Speed setting switchover.
• 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
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.
• For encoder feedback control operation, check that the number of motor poles is correct.
• Connect the plug-in option securely.
• Connect the CC-Link IE Field Network communication circuit board of the FR-A800-GF securely.
• Take precautions against noise if there are devices producing excessive electrical noise around the inverter.
If the problem still persists after taking the above measure, contact your sales representative.
• Connect the communication option to the connector 1.
• For encoder feedback control operation, use a motor with 8 poles or less.
• 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.)
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FR-LU08 indication Pre-charge fault
FR-LU08 indication PID signal fault
page 601.) This protective function is not available in the initial status.
to
FR-LU08 indication Fault 1 to Fault 3
page 618). This protective function