Owner’s Manual
BWC EXCEL 10 Turbine
Page 24
GROUND FAULT
7000
An input phase appears to be shorted to chassis
ground. It may require a high voltage measurement
device such as a Megger to confirm the fault.
AC OVER FREQ
8000
The frequency of the utility grid voltage went out of
range. The upper range threshold was crossed. If
supported (Unit Rev 1005 or greater) this code is
also used to indicate that the ROCOF threshold was
reached. ROCOF might occur when large
equipment is switched on or off.
AC UNDER FREQ
8100
The frequency of the utility grid voltage went out of
range. The lower range threshold was crossed.
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When the Powersync II is starting up after initialization, or after the RESET button has
been pushed, or after a power outage, it will go through a 300 second (5 minute)
countdown that is required by UL 1741. This UL standard also dictates high and low
limits for utility voltage and frequency, outside of which the inverter is required to shut
down until they return to the acceptable range. This is called a FAULT condition.
There are a number of possible FAULT conditions during which the Powersync II will be
protecting itself or the power grid. When a FAULT occurs the Powersync II will shut
down (no power production) and a Fault Code will be displayed on the digital display. A
list of the Fault Codes can be found in the detailed instructions for the Powersync II
inverter provided in the Appendix. FAULTS will reset themselves automatically;
assuming the underlying cause of the fault has been cleared, unless the inverter
experiences three (3) FAULTS of any type in a one hour period. In this case a manual
RESET is required on the digital display.
CAUTION
If a manual reset is required we highly recommend
that you check the FAULT CODE list for indications
that there is an equipment or wiring problem that
needs addressing.
One unique feature of the Powersync II inverter is its Soft Grid power limiting capability
that can reduce the number of nuisance FAULTS on weak power lines during periods of
high turbine power output. On a weak power line the EXCEL 10 wind turbine can, on a
windy day, raise the local utility voltage above the UL 1741 threshold, causing a FAULT.
The Soft Grid feature tries to prevent these FAULTS by reducing power output from the
wind turbine. When the Powersync II is in this mode the digital display will show “Soft
Grid”.
The STOP pad on the digital display will shut down the Powersync II inverter. Press the
RESET pad to restart (which will start the 300 sec. countdown).
