202
PROTECTIVE FUNCTIONS
Operation Panel
Indication
E. 6
FR-PU04
Fault 6
E. 7 Fault 7
Name CPU error
Description
This function stops the inverter output if a communication error occurs in the built-in
CPU.
Check point • Check for excess electrical noises around the inverter.
Corrective action
• If there are any devices generating excess electrical noises around the inverter,
take measures against noises.
• 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
encoder 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 is increased or decreased due to
load, etc. and the motor speed cannot be controled to meet the speed command
value during vector control executed with the FR-A5AP.
Check point Check for sudden load change.
Corrective action Take action to avoid sudden load change.
