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Operation
12LPC15 Manual
GFCI
A GFCI measures the amount of AC current into the GFCI line side “hot” and “neutral” terminals. Both terminals
should measure the same amount of current under normal conditions. Any difference in current is considered the
leakage current. If the leakage current is greater than 5mA, the GFCI will trip. A tripped GFCI suggests that there
has been a breakdown in the electrical insulation of a connected unit. This can result in a safety hazard for the
user. The breakdown could have been caused by broken wire insulation with the live wire contacting the ground
conductor, water in contact with a live conductor, or any other inadvertent electrical path to ground. The inverter
needs to be on or bypass power must be applied to reset a tripped GFCI.
When installed with a Leviton GFNT2 GFCI, the status LED will operate according to Table 4.
GFCI Status LED
LED Color & State
Condition
Action Required
Green — Constant On
GFCI is powered from the line
side and operating correctly
None
Red — Constant On
Fault found during normal
operation
Press “Test” to trip the GFCI. If it fails to reset
after pressing “Reset,” the GFCI will need to be
replaced.
Red — Blinking
Fault found during self-test
Press “Test” to trip the GFCI. If it fails to reset
after pressing “Reset,” the GFCI will need to be
replaced.
Table 4 GFCI Status LED
The GFCI installed in this inverter is compliant with the latest requirements for GFCIs per UL 943. This includes
automatic self-testing and line-load reversal.
Self-Testing
The GFCI will periodically test the ground fault detection circuit in the background. If the test determines that
there is a problem with the detection circuit, the GFCI will trip and/or notify the user visually with the status LED.
The GFCI will perform a self-test when AC power is first applied. The LED will blink red before turning green.
Line-Load Reversal
If the line and load terminals are wired backwards, the GFCI will not reset and power will not be available until the
wiring has been corrected.
NOTE: Depending on the GFCI model that is used, the line and load terminals on the rear may not be in the same
position. The user must verify the GFCI markings just the to ensure proper connection.
NOTE: Replace the GFCI outlet with only the exact replacement part unless instructed to do otherwise by the
factory. Other types may fail to properly operate when connected to this unit. Refer to Table 13 for replacement
options.
