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Grid-tied Residential Inverters
Installation and Operation Manual
NOTE: In this case the fault refers to the last fault detected.
If the inverter is in a faulted state, the red LED blinks and the VFD scrolls through the
screens shown in the faulted example above. The text of the fault describes the specific fault
condition that the inverter experienced.
If the inverter is no longer experiencing the condition that caused the fault (e.g. the AC
voltage climbs above 264V then drops below 264V), the red LED stops blinking and the
inverter starts the five minute count-down timer. During these five minutes, the display also
shows the last fault.
Multiple Faults
If the inverter detects multiple faults at one time, the inverter displays the text of the first
fault detected.
For multiple faults, the numerical values of the fault codes are added as shown in
Figure 5-3.
Figure 5-3 AC Voltage High/DC Voltage Low Fault
Figure 5-3 displays the AC Voltage High fault (1000 0400), plus a DC Voltage Low fault
(1000 0020). This might occur at night, when the panel voltage is low, due to darkness, and
the utility voltage was above the limits defined in Table 3-2.
Figure 5-4 Power Low Fault
Figure 5-4 shows a Power Low fault. After the fault occurrence, the inverter had a DC
Voltage High fault. In this case, the display added the fault codes 0200 0000 plus 1000 0040
to become 1200 0040.
If the faults have the same first digit (such as 1000 XXXX) the 1 remains the same and only
the second block of four numbers add to the original fault code.
!
WARNING
These servicing instructions are for qualified personnel only. To reduce the
risk of electric shock, do not perform any servicing other than that specified in
the operating instructions unless you are qualified.
