Sunny Boy 2500U Installation and Operator’s Manual
SB2500U-11:NE - 26 - SMA Regelsysteme GmbH
LED indicator Operating condition Description
green:
red:
yellow:
standby (night) input voltage < 120 V
green:
red:
yellow:
initialization input voltage: 120 V ... 240 V
green:
red:
yellow:
stop changing operating condition or manually initi-
ated condition
green:
red:
yellow:
waiting,
checking grid
starting conditions are being checked
green:
red:
yellow:
feeding grid
MPP or constant voltage mode
normal operation
green:
red:
yellow:
derating mode Reduction of power fed to the grid due to in-
creased temperature of the heat sink
green:
red:
yellow:
insulation failure ground fault of the PV-panels
see chapter 4.2
green:
red:
yellow:
failure GFDI fuse is defective
see chapter 4.2
green:
red:
yellow:
failure internal or external failure, exact description
depending on blink code
see chapter 4.3
green:
red:
yellow:
Consistent Failure A failure of the utility has occurred
Table 4.1: Operation indication overview
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