These numbers are called alarm codes, or error codes. The drive and amplifier technicians at Repair Zone use these alarm codes, also called fault codes, to help them troubleshoot during a repair. When, many times our technicians see the same fault codes come up. Here is a list of the most common Alarm codes found on the status display on C-Series, Fanuc servo amplifiers: Alarm Code #1 Overvoltage alarm (HV). If DC voltage of main power supply is abnormally high, overvoltage alarms occurs (HV level: 430V DC). Alarm occurs when regenerative discharge resistor is disconnected.įor 200V AC input, main circuit voltage is 283V DC (200 x 1.414). Discharge operation is started at voltage of main circuit voltage plus 60V.
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