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5. Troubleshooting
The inverter provides two indicator lights in the form of Light Emitting Diodes, or LEDs.
The LEDs are the primary indicators of the system status: O.K., Sleep or Faulted. The LEDs
are located above the inverter display in the upper left hand corner on the front lid.
LED Status
5.1
Red LED
The light on the left is a red LED and is the primary indicator of system stand-by or
1.
fault condition.
A solid red LED and a blank screen indicates the system is in normal sleep or stand-by
2.
mode. This mode occurs if there is not enough sunlight present to generate DC voltage
at night and the AC properties are within the provided specifications.
The red LED blinks if the inverter has had a fault condition, and the vacuum fluorescent
3.
display (VFD) displays a fault code. If the red LED is blinking, carefully record the
numerical error code and text describing the error. Possible faults are listed in Table 5-1.
Green LED
The light on the right is a green LED and is the primary indicator the system is generat-
1.
ing power.
The green LED illuminates any time the DC voltage is above the inverter’s DC start
2.
voltage and all operational parameters are met. When the green light illuminates, the
inverter tries to convert power from the PV array.
Red and Green LED Lights On
If both LED lights are solid at the same time, contact PV Powered Technical Support
for assistance.
Ground Fault Error
!
WARNING
Replace the GFI fuse with the same type and rating of fuse. The inverter uses
Littelfuse KLKD1 1A/600VDC.
The inverter’s GFDI circuit reports a ground fault error if the 1 amp fuse is blown and
1.
the voltage potential between ground and the grounded terminal of the PV array is
greater than +25 VDC, or less than -25 VDC. This voltage potential can only occur if
the ground fault fuse in the inverter has opened.
A ground fault occurs when unintended current has a path to ground. The most common
2.
source of a PV system ground faults are crossed wires, a nicked PV module conductor
touching a grounded surface, or cables inside a conduit have metal exposed through the
insulation.
A less likely cause is limited to multiple inverter installations, when the positive and
3.
negative array strings are crossed. Crossed wires occur when a positive or negative
TROUBLESHOOTING