AC Servo Amplifier Alarms
FANUC AC Servo Amplifier alarms
Fanuc AC Servo Amplifier alarms. These Alarm and Error Codes cover AC digital servo amp series A06B-6057, and S series amplifier servo drives A06B-6058
The LED indicators on the printed circuit boards of a servo amplifier indicate states of the servo amplifier.
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| Alarm Code | Colour | Description of Alarm/Error |
| 5V | Green | SIGN FOR CONTROL POWER ON
5V indicates the state of power source applied on the board |
| DRDY | Green | SIGN FOR PWM SIGNAL AVAILABLE
DRDT indicates the ready state f servo servo amplifier. The condition of DRDY is no alarm and MCON from NC being low. |
| HV | Red | HIGH VOLTAGE ALARM
HV occurs when excessive current has crossed the DC link |
| HC | Red | HIGH CURRENT ALARM
HC occurs when excessive current has crossed the DC link. |
| LV | Red | LOW VOLTAGE ALARM
LV occurs when the DC link voltage is excessively low or the regulator circuit has a malfunction. |
| DC | Red | DISCHARGE ALARM
DC occurs when the capacity of the the discharge circuit has been exceeded. |
| OH | Red | OVERHEAT ALARM
OH occurs when a normally closed thermostat contact which is mounted either in the servo amplifier, on a separate discharge unit, or in a power transformer has opened. |
| FAL | Red | In case of fuse alarm NFB1-3 and trip of F4/F5. |