Fanuc Alpha Servo Amplifier Unit Alarms and Error Codes.

Fanuc Alpha Servo Amplifier Unit Alarms covering the series of Fanuc Alpha servo amplifiers. Namely the A06B-6089/6090

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If an alarm condition related to the servo amplifier unit occurs, the 7 segment LED indicator on the amplifier front behaves as listed below.

Alarm CodeTypeDescription of Alarm/Error
1Over Voltage alarm ( HV)This alarm occurs if the DC voltage of the main circuit power supply is abnormally high.
2Low control power voltage alarm (LV)This alarm occurs if the control power voltage is abnormally low.
3Low DC link voltage alarm (LVDC)This alarm occurs if the control power voltage is abnormally low or the circuit breaker trips.
4Regenerative discharge control circuit failure alarm(DCSW) This alarm occurs if:

  • The short time regenerative discharge energy is too high
  • The regeneration discharge circuit is abnormal
5
Over regenerative discharge alarm (DCOH)This alarm occurs if:

  • The average regenerative discharge energy is too high
  • The transformer overheats
7Dynamic brake circuit failure alarm (DBRLY)This alarm occurs if the relay contacts of the dynamic brake welds together.
8L-axis over current alarm (HCL)This alarm occurs if an abnormally high current flows in the L -axis motor.
9M-axis over current alarm (HCM)This alarm occurs if an abnormally high current flows in the M -axis motor.
6L and M axis over current alarm (HCM)
This alarm occurs if an abnormally high current flows in the L & M axes motor.
8.L-axis IPM alarm ( IPML)This alarm is detected by the IPM of the L axis.
9.M-axis IPM alarm (IPMM)This alarm is detected by the IPM of the M axis.
bL and M axis IPM alarm
This alarm is detected by the IPM of the L and M axes.
TripsCircuit breakerThe circuit breaker trips if an abnormally high current flows through it.