Xantrex PV-100208 Operation And Maintenance Manual page 28

SECTION 5
TROUBLESHOOTING
Clear the fault and restart the PCU. If the fault is sustained contact your Xantrex Technology distributor
for assistance or service.
0828 – PV Over-Current Fault (S)
Current through the PV CT has exceeded the allowable limit.
Possible causes:
• PV system wiring short: Inspect the PV power system for short circuits.
• PCU Power Supply is defective: Verify +/-15Vdc sources, referenced to analog ground, on the
PCU. There are labeled test points on the PCU circuit board. Note: There are two isolated +15Vdc
power supplies labeled +15Vdc and +15Vdc Drv. The +15Vdc Drv power supply provides power
for the matrix driver boards only.
• Faulty CT wiring: Verify the wiring between the PCU and the CT is properly connected and undam-
aged. Refer to the system schematic in Section 7.
• CT defective: Locate the current transducer for the PV leg in question (see control components
drawing in Section 7). With a digital multi-meter measure the voltage from CT pins 1, 2, and 3 to
chassis ground. Pins 1 and 3 should read approximately +15 and -15Vdc respectively. These volt-
ages are sourced directly from the PCU. Pin 2 should read less than 20mV when no current is
passing through the CT window. If Pin 2 reads greater than 20mV, and the supply voltages are on
Pins 1 and 3 are correct, the CT may be damaged
Clear the fault and restart the PCU. If the fault is sustained contact your Xantrex Technology distributor
for assistance or service.
8021 - DC Bus Voltage High (H)
The DC Bus voltage has exceeded the maximum allowable limit.
This fault is generally transient in nature. Clear the fault and attempt to restart the PV-100208.
DOCUMENT: 151700
PV-100208 Photovoltaic Inverter
Operation and Maintenance Manual
Copyright 2003, Xantrex Technology Inc.
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