PROTECTIVE FUNCTIONS
188
E. 6 Fault 6
Operation Panel
Indication
E. 7
FR-PU04
Fault 7
Name
CPU error
Description
This function stops the inverter output if a communication error occurs in the
built-in CPU.
Check point
Corrective action
Contact your sales representative.
Operation Panel
Indication
E.P24
FR-PU04
E.P24
Name
24VDC power output short circuit
Description
When the 24VDC power output from the PC terminal is shorted, this function
shuts off the power output. At this time, all external contact inputs switch off. The
inverter cannot be reset by entering the RES signal. To reset, use the operation
panel or switch power off, then on again.
Check point
Check for a short circuit in the PC terminal output.
Corrective action
Remedy the short circuit portion.
Operation Panel
Indication
E.CTE
FR-PU04
Name
Operation panel power supply short circuit
Description
When the operation panel power supply (P5S of the PU connector) is shorted,
this function shuts off the power supply output. At this time, the operation panel
(parameter unit) cannot be used and RS-485 communication from the PU
connector cannot be made. To reset, enter the RES signal or switch power off,
then on again.
Check point
Check for a short circuit in the PU connector cable.
Corrective action
Check the PU and cable.
Operation Panel
Indication
E.MB1
to 7
FR-PU04
Name
Brake sequence error
Description
•
The inverter output is stopped when a sequence error occurs during use of the
brake sequence function (Pr. 278 to Pr. 285).
•
If (detected frequency) - (output frequency) has become less than Pr. 285
during PLG feedback or orientation control selected with the FR-A5AP, E.MB1
occurs and the inverter output is stopped.
Check point
Find the cause of alarm occurrence.
Corrective action
Perform parameter setting check and wiring properly.
Operation Panel
Indication
E.0SD
FR-PU04
Excessive speed deflection
Name
Excessive speed deviation detection
Description
The inverter output is stopped if the motor speed increased or decreased due to
load, etc. during vector control executed with the FR-A5AP cannot be controlled
to meet the speed command value.
Check point
Check for sudden load change.
Corrective action
Take action to avoid sudden load change.
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