
3.TROUBLESHOOTING AND ACTION TROUBLESHOOTING FOR βi SVPM B-65325EN/01
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3.2 SERVO UNIT
The following table lists alarms related to the servo amplifier module.
See this table while comparing the CNC alarm codes presented in
Chapter 2, "Alarm Numbers and Brief Description" with the LED
displays of the STATUS 2.
Alarm
LED
display
Major cause Reference
Inverter: internal cooling fan stopped 1
- This alarm is not issued in the SVPM.
- If this alarm is issued, the SVPM may be defective.
Inverter: control power supply
undervoltage
2
- The 24 V control power supply input to the SVPM is low.
- Connector/cable (CXA2A/B) defective
- SVPM failure
3.2.1
Inverter: DC link undervoltage 5
- Low input voltage
- SVPM failure
3.2.2
Inverter: overheat 6
- The motor is being used under a harsh condition.
- The ambient temperature is high.
- SVPM failure
3.2.3
Inverter: cooling fan stopped of the
radiator
F
- This alarm is not issued in the SVPM.
- If this alarm is issued, the SVPM may be defective.
Communication error between amplifier
modules
P - SVPM failure 3.2.4
Inverter: IPM alarm (L axis) 8.
Inverter: IPM alarm (M axis) 9.
Inverter: IPM alarm (N axis) A.
- Short-circuit between power lead phases or ground fault
in them
- Short-circuit between motor winding phases or ground
fault in them
- SVPM failure
3.2.5
Inverter: IPM alarm (OH) (L axis) 8.
Inverter: IPM alarm (OH) (M axis) 9.
Inverter: IPM alarm (OH) (N axis) A.
- The motor is being used under a harsh condition.
- The ambient temperature is high.
- SVPM failure
3.2.6
Inverter: motor current alarm (L axis) b
Inverter: motor current alarm (M axis) c
Inverter: motor current alarm (N axis) d
- Short-circuit between power lead phases or ground fault
in them
- Short-circuit between motor winding phases or ground
fault in them
- Incorrect motor ID setting
- SVPM failure
- Motor failure
3.2.7
Inverter: FSSB communication error
(COP10B)
U
- Connector or cable (COP10B) failure
- SVPM failure
- CNC failure
3.2.8