Fanuc Servo Amplifier C Series Alarm and Error Codes.
These FANUC C Series servo amplifier alarms and error codes cover the A06B-6066 series.
|Alarm Code||Type||Description of Alarm/Error|
|If DC voltage of main circuit power supply is abnormally high, over voltage alarm occurs ( HV level: 430V DC). Alarm occurs when regenerative discharge resistor is disconnected. For 200V Ac input, main circuit voltage is 283V DC (200×1.414). Discharge operation is started at voltage of main circuit voltage plus 60V.|
(Control power supply undervoltage)
|Alarm occurs if control circuit power supply voltage (+5V) is abnormally low (LV5V Level: 4.6 VDC)|
(DC Link undervoltage alarm)
|Alarm occurs if DC voltage of main circuit power supply is abnormally low. (LVDV level: 120V). Causes may include power supply voltage (+15V) being 10V or lower and driver module PCB not inserted normally.|
(Regenerative control circuit abnormality)
|Alarm occurs when short time regeneration discharge energy is too high. Cause can be disconnection of regenration discharge resistor. If IGBT for discharge is continuously on for 1 second or longer, cause may be short circuit between C and E for IGBT for discharge.|
|5||DCOH (Excessive regenerative discharge alarm)||Alarm occurs when average regenerative discharge energy is too high. Causes may include operation of thermostat for regenrationdischarge resistor or thermostat between (15) and (16) on terminal block T1: this operation results from too frequent acceleration/deceleration operations.|
|6||OH (Servo amplifier overheat)||Alarm occurs when thermostat in amplifier operates ( when thermostat contact on PCB opens). Check if motor load exceeds rated current.|
|7||MCC (Magnetic contractor welding alarm)||Alarm occurs when magnetic contactor contact welds. Check for contact welding immediately after use of magnetic contactor is specified. Causes may include short circuit of 3 phase diode bridge.|
|8||HCL (Overcurrent alarm)||Alarm occurs when abnormally high current flows in main circuit of 1-axis amplifier or in main circuit of L axis of 2-axis amplifier. Causes may include faulty IC, abnomral PWM signal, faulty motor, and grounded wiring.|
|9||HCM (Overcurrent alarm)||Alarm occurs when abnormally high current flows in main circuity of M axis of 2-axis amplifier. Causes may include faulty IC, abnormal PWM signal, faulty motor, and grounded wiring.|
|b||HCLM (Overcurrent alarm)||Alarm occurs when abnormally high current flows in main cirucits of L and M axes of 2 axis amplifier. Causes may include faulty IC, abnormal PWM signal, faulty motor, and grounded wiring.|