Code P11-CONV-11301: C3 Precharge

Type: Alarm 1 1. The AC line voltage is in the range of 50...300V (for 400V class drives) or 50...400V (for 600V class drives). Precharge begins when the AC line voltage reaches 300V or 400V. 2. The drive has been in precharge for more than 12 seconds. If the “Cn Precharge” alarm persists for more than 30 seconds the drive will fault. Following powerup or a fault reset, the converter does not issue any voltage-related alarms until the AC input voltage exceeds 50V to prevent an alarm when a customer-supplied auxiliary power supply is used. 3. The DC bus open circuit test can be cycling. If this test cycles for more than 10 seconds, event 144/244 “Cn DC Bus Open” occurs. Alarm: • Check the line voltage displayed in [Cn L12 Line Volt], [Cn L23 Line Volt], and [CV L31 Line Volt] (port 11). • Check the phase current displayed in [Cn L1 Phase Curr], [Cn L2 Phase Curr], and [Cn L3 Phase Curr] (port 11) and the bus voltage in [Cn DC Bus Volt] (port 11). Line current, line voltage, and bus voltage sensing are all performed on the converter gate firing board. If this alarm persists, replace the converter gate firing board. Fault: • Verify that the current transducers have not all failed. If necessary, replace all three current transducers. • Verify that the DC link inductor has not failed. If necessary, replace the DC link choke. • Verify that the converter line and DC bus wiring is connected. • Verify that the capacitor bank is properly installed and connected. Non-Reset Fault Coast