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6. TROUBLESHOOTING
6-4
If any of the messages in Table 6-2 appears, the drive unit is assumed to have
failed. If the same message reappears after an alarm reset, immediately replace
the drive unit.
Table 6-2
Parameter
Unit Display
Protective
Function Name
Possible Cause (
)
and
Corrective Action (•)
CPU fault
The CPU malfunctioned or failed.
Storage device
fault
The storage device failed.
Brake circuit fault
The regenerative brake circuit failed.
•
If E. BE reappears after a reset, immediately
switch power off.
Leaving power on will overheat the brake
resistor.
6.1.2 Alarm function activated
If the alarm function is activated during motor operation, any of the displays in
Table 6-3 is provided on the parameter unit.
If you ignore the alarm message and continue operation, the fault detection
function is activated, leading to an operation stop. When you noticed that the
alarm function had been activated, immediately remove its cause.
MEMO
That the alarm function has been activated can be exported as an
alarm signal.
Refer to: Chapter 8, 8.7.2 Selection of the control
circuit output terminal functions
Table 6-3
Parameter
Unit Display
Protective Function Name
Detection Level
Related Protective Function
Overload 1
Pr. 22 setting [Section 8.5.4]
Acceleration-time overcurrent, constant
speed-time overcurrent, deceleration-
time overcurrent, stall stop
Overload 2
Main circuit DC voltage more
than 390V
Deceleration-time overvoltage
Fan failure
Cooling fan fault
Refer to: Pr. 244 [Section 8.5.5]
Fin overheat