How to fix a SMA SUNNY BOY 3300 when the red LED glows continuously?
First, check the varistors using a multimeter. If another fault exists, contact the SMA Service Line. Alternatively, replace the defective varistor with a new one ordered from SMA Solar Technology.
Why does my SMA SUNNY BOY 3300 Inverter show ACVtgRPro?
The ACVtgRPro error on your SMA Inverter indicates that the grid voltage at the connection point is too high, or the grid impedance at the connection point is too high. You should check the grid voltage at the inverter's connection point. If the grid voltage is continually within the acceptable range, and this error is still displayed, contact the SMA Serviceline. If the grid voltage is 253 V or more, ask the electric power company whether the voltage at the feed-in point can be adjusted, or whether they would agree to an alteration of the limit value of the ACVtgRPro parameter for voltage quality monitoring.
What to do if my SMA SUNNY BOY 3300 displays '!PV-Overvoltage! !DISCONNECT DC!'?
Immediately disconnect the SMA Inverter from the grid. Here's how: 1. Turn off the line circuit breaker. 2. Remove the Electronic Solar Switch. 3. Disconnect all the DC connectors. 4. Check the DC voltage. * If the DC voltage exceeds the maximum input voltage, check the plant design or contact the person who installed the PV generator. * If the DC voltage is below the maximum input voltage, reconnect the inverter to the PV generator. If the message appears again, disconnect the inverter and contact the SMA Serviceline.
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