8. MAINTENANCE
8 - 6
Alarm Status
Segment LED
Display
Alarm Code
ALM8,4,2,1
Abbreviation
Alarm
Name
Alarm
Clear
Contents
0101 OV Over
voltage
Possible DC voltage of main circuit of amplifier
exceeded allowable voltage
Alarm code 0,1 indicates: when Func2/ bit7,6 =”0,0”, “0”= output open and “1”= output short.
Operating state when alarm occurred
POSSIBLE CAUSES
OPERATING STATE
1 2 3 4 5 6
When control power supply is turned on
○
When main circuit power supply is turned on
○ ○
When motor is started or stopped
△ ○ ○ ○ ○
Corrective Measures
CAUSES CORRECTIVE MEASURES
1 Faulty amplifier control board Replace servo amplifier.
2 Power voltage of main circuit is exceeding
allowable voltage
Reduce voltage to within allowable range.
3 Load inertia is too high Reduce load inertia to within allowable range.
4 Subject to not connecting regenerative resistor:
• Operational pattern requires regenerative
resistor.
• Review operational pattern and load inertia, change
to operational pattern not requiring regenerative
resistor.
• Install external regenerative resistor
5 Subject to using built-in regenerative resistor:
• Faulty wiring of connector CND, or
• Regenerative circuit is faulty
• Wiring built-in regenerative resistor correctly:
[15A/30A] Connect built-in regenerative resistor
wires to P and Y terminals of connector
CND.
[50A] Short circuit between P- X terminals of
connector CND.
Replace Servo Amplifier if malfunction persists.
6 Subject to using external regenerative
resistor:
• Regenerative resistor is not connected
• Regenerative resistor is broken
• Regenerative circuit is faulty
Turn power OFF, check wiring and resistance value
of regenerative resistor.
Replace amplifier if malfunction persists.
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