Mitsubishi Electric FR-A500 Instruction Manual page 207

Operation Panel
Indication
Name CPU error
This function stops the inverter output if a communication error occurs in the built-in
Description
CPU.
Check point • Check for excess electrical noises around the inverter.
• If there are any devices generating excess electrical noises around the inverter,
Corrective action
• Contact your sales representative.
Operation Panel
E.P24
Indication
Name 24VDC power output short circuit
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
Description
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
E.CTE
Indication
Name Operation panel power supply short circuit
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
Description
(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 E.MB1
Indication
Brake sequence error
Name
• The inverter output is stopped when a sequence error occurs during use of the
• If (detected frequency) - (output frequency) has become less than Pr. 285 during
Description
Check point Find the cause of alarm occurrence.
Corrective action Perform parameter setting check and wiring properly.
Operation Panel
E.0SD
Indication
Name Excessive speed deviation detection
The inverter output is stopped if the motor speed is increased or decreased due to
Description 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.
E. 6
E. 7
take measures against noises.
to 7
brake sequence function (Pr. 278 to Pr. 285).
encoder feedback or orientation control selected with the FR-A5AP, E.MB1 occurs
and the inverter output is stopped.
PROTECTIVE FUNCTIONS
FR-PU04
FR-PU04
FR-PU04
FR-PU04
FR-PU04
198
Fault 6
Fault 7
E.P24


Excessive speed deflection