
9. TROUBLESHOOTING (SERIAL INTERFACE SPINDLE)
B–62755EN/01
394
Item Cause of trouble Check procedure Remedy
1 Defective PCB
p
Replace PCB.
2
Abnormal power sup-
ply voltage
.
See (5) above.
Item Cause of trouble Check procedure Remedy
1
Incorrect setting of
parameter for number
of speed feedback
pulses (No. 6511)
Check if number of speed
feedback pulses matches
parameter setting.
Set correct value in
parameter.
NOTE
See Chapter 6.
Item Cause of trouble Check procedure Remedy
1
AC power supply volt-
age 10% higher than
rated voltage.
Check power supply
voltage.
2
Incorrect setting of
toggle switch for volt-
age switching.
Check power supply
voltage.
Change setting from 200V
to 230V.
Item Cause of trouble Check procedure Remedy
1
Cooling fan is defec-
tive.
Check if fan is rotating. Replace fan.
2
Overload operation. Check load by using a
load meter.
Re-examine the cutting
condition.
3
Dusty and dirty. Clean using compressed
air or vacuum cleaner.
This alarm indicates abnormally low AC power voltage (–15% or less).
This alarm may be generated even during momentary power failures.
Item Cause of trouble Check procedure Remedy
1
High power imped-
ance.
Examine AC power specifi-
cation.
2 PCB is defective. Replace PCB.
3
Defective transistor
module (TM1).
Replace transistor mod-
ule.
Item Cause of trouble Check procedure Remedy
1
Output terminals or
internal circuit of mo-
tor is shorted.
Check connections.
2
Transistor module is
defective.
Check the transistor
module.
Replace transistor module.
3 PCB is defective. Replace PCB.
AL–05 Control power
supply fuse blown
AL–07 Excessive speed
(Detection by
digital value)
AL–08 High input voltage
AL–09 Heat sink is
overheated
AL–10 Input power
voltage drops
AL–11 Overvoltage of DC
link circuit
(Regenerative
circuit is
faulty…Regenerati
on failure)
AL–12 Overcurrent flows
to DC link circuit