Xantrex PV-100208 Operation And Maintenance Manual page 27

SECTION 5
TROUBLESHOOTING
The dry contact auxiliary switch mounted to the PV disconnect switch has been toggled. The auxil-
iary switch should be opened when the PV disc switch is open. If the fault will not clear when the PV
disconnect switch is closed:
• Isolate PV-100208 from utility power.
• Close PV disc switch and check continuity between PCU J3-3 and PCU J2-7. If there is no continu-
ity, inspect wiring between the PCU and the auxiliary switch (see page 3 of the system schematic for
further detail).
XX25 - Line Gate Drive Fault (S)
One of the IGBT gate drive boards signaled the PCU that there was a fault. The particular device at
which the fault was detected is indicated by the first two digits of the fault code, as follows:
XX: 01 = Phase A+
04 = Phase B+
10 = Phase C+
If more than one phase faults simultaneously, the error code will contain the summation of phase fault
values. For example, if phase A+ and B+ fault simultaneously, the error will read 0525.
Make sure the fiber optics for the device and matrix in question are properly connected to the driver
board. Similarly, make sure the fiber is properly connected at the PCU.
Clear the fault and restart the PV-100208. If the fault is sustained, contact your Xantrex Technology
distributor for assistance or service.
YY27 - Line Over-Current Fault (S)
Current in one phase of the matrix has exceeded the allowable limit. The faulted phase is indicated by the
first two digits of the fault code, as follows:
YY: 01 = Phase A
02 = Phase B
04 = Phase C
If more than one phase faults simultaneously, the error code will contain the summation of phase fault
values. For example, if phase A and C fault simultaneously, the error will read 0527.
Possible causes:
• AC system wiring short: Inspect the AC 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 power supply and the CT is properly con-
nected and undamaged. Refer to page 3 of the system schematic in Section 7.
• CT defective: Locate the current transducer for the matrix and phase in question (see control com-
ponents 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
voltages 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.
DOCUMENT: 151700
02 = Phase A-
08 = Phase B-
20 = Phase C-
PV-100208 Photovoltaic Inverter
Operation and Maintenance Manual
Copyright 2003, Xantrex Technology Inc.
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