AC Line Over Frequency Fault | Xantrex Technology PV-30208 specs

SECTION 5

TROUBLESHOOTING

This fault is auto-resetting. The unit will automatically restart after line has stabilized within normal limits for 5 minutes. Frequency setpoints may be modified via the operator interface program. Utility protection setpoints may only be adjusted by trained personnel with approval by both the local utility and the equipment owner.

(5) AC Line Over Frequency Fault (0x0800)

The AC frequency exceeded the maximum-programmed limit. This limit is set to 60.5 Hz and the system response time limit is set to less than 0.1 seconds to insure the PV-30208 disconnects from the utility within the time allowed by UL1741.

Possible causes:

•The utility frequency exceeded the allowable limit (60.5 Hz by default). Verify the utility frequency is stable and within allowable operating limits.

•There is a problem with one or more of the AC sense wires (see system schematic in Section 7).

This fault is auto-resetting. The unit will automatically restart after line has stabilized within normal limits for 5 minutes.

(6) Ground Current Fault (0x8000)

The earth safety ground current has exceeded the maximum-programmed value.

Possible causes:

•The negative wire from the PV array has been passed through CT1. Verify PV ground jumper is installed between TBDC- and TB NEUT.

•Inspect the PV array for actual ground faults.

•The PV array has been grounded in more than one location. If the PV array is grounded through CT1, it must not be grounded at any other location.

•CT1 defective: Contact your Xantrex Technology distributor for assistance or service.

(7) DC Bus Over Voltage Fault (0x4000)

The DC bus voltage has exceeded the maximum limit.

This is also the PV input voltage sense point. Check the PV input voltage at the PV disconnect switch. If the voltage is below 600 VDC and agrees with the voltage displayed on the LCD, cycle the on/off switch and restart the PV-30208.

Possible causes:

•The PV array open circuit voltage exceeded 600 VDC.

•There is a problem with the PV voltage sense wiring (see system schematic in Section 7).

(8) CT Offset Fault (0x80000)

Upon system startup, the PV-30208 has determined that the CT offset current is too large to be cali- brated. This is caused by the control system detecting current, when no current is commanded.

•Observe individual phase currents with the operator interface program. Generally, a CT offset fault with show high currents on one phase while the system is in Standby, with zero actual current being

DOCUMENT: 151315PV-30208 Photovoltaic Inverter5-4

Operation and Maintenance Manual