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10 Troubleshooting SMA Solar Technology AG
46 SB13_21TL-IA-en-65 Installation Manual
10.2 Display Messages
10.2.1 Measurement Channels
Measurement channels are measured values which are shown on the display. The measurement
channels can also be read out using a communication product.
10.2.2 Status Messages
Status messages are shown in the second line of the display and always start with the word “Mode”.
Status messages indicate operating states which do not constitute faults or disturbances. The inverter
continues feeding into the electricity grid.
Measurement
channel
Explanation
E-today Total amount of energy fed in on the current day
Status Indicates the current operating state (see Section10.2.2 "Status Messages",
page46).
Pac AC power supplied
Vpv PV input voltage
E-total Total amount of energy fed in
h-total Total number of operating hours in feed-in operation
Warning /
fault /
disturbance
Display of a current disturbance or fault with corresponding error message
(see Section10.2.3 "Errors, Disturbances, Warnings", page47)
When certain disturbances occur, the shutdown value and the current value are
also displayed.
Message Explanation
Derating This message can have several causes:
Overtemperature in the inverter. The inverter reduces its power to prevent
overheating.
External active power limitation via the Power Reducer Box and
Sunny WebBox. The inverter reduces its power output automatically based
on network operator specifications. The Power Reducer Box transfers the
signal from the network operator to the inverter via the Sunny WebBox.
Error The inverter has detected a fault. The specific error message is also displayed
(see Section10.2.3 "Errors, Disturbances, Warnings", page47).
MPP The inverter is operating in MPP mode. MPP is the standard display message when
operating under normal irradiation conditions.
46


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