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Chapter 1 - Welcome
10.3 - Alarms, Faults, and Warnings
This section lists the SolarCity H6 inverter alarms, faults, and warnings along with their
causes and solutions.
10.3.1 - Alarms
The SolarCity H6 inverter can display the following alarms, which can be corrected as
described below:
# LED Display Cause Solution
1 Yellow LED on Battery Sys Fault BiDCDC boost in
battery pack has
failed.
Check the battery
pack and correct
any problem(s).
2 Yellow LED on Battery Sys Fault Battery pack or CAN
communication
fault.
Check the
connection cable
between the battery
pack and the
inverter.
3 Yellow LED
blinking once
per second
Grid under
frequency
Grid under-
frequency fault
detected. System is
idle because no PV
or battery pack
energy is available.
N/A
4 Yellow LED
blinking once
per second
Grid over frequency Grid over-frequency
fault detected.
System is idle
because no PV or
battery pack energy
is available.
N/A
5 Yellow LED
blinking once
per second
Grid underVolt Grid under-voltage
fault detected.
System is idle
because no PV or
battery pack energy
is available.
N/A
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