Reactivating The Device Following Automatic Shutdown - SMA Sunny Island 5048 Technical Description

SMA Solar Technology AG
9.5 Reactivating the Device Following Automatic Shutdown
A complete shutdown indicates that components of the off-grid system have failed or are not working
correctly due to incorrect parameter settings. Check the off-grid system for possible faults, both before
and after reactivating the system, to avoid a complete shutdown in the future.
To reactivate the Sunny Island after it has switched off due to a battery being too deeply discharged,
proceed as follows:
1. Switch the Sunny Island's DC circuit breaker to the "OFF" position.
2. Wait at least 15 minutes to let the capacitors discharge and to allow the voltage inside the
device to drop to a safe level.
3. Switch the Sunny Island's DC circuit breaker to the "ON" position.
☑ The Sunn Island's display lights up.
Switching on the DC Circuit Breaker
If, in rare cases, the device cannot be switched back on after 15 minutes, wait a little longer
and try it again.
4. Switch on the Sunny Island as described in chapter 9.1 "Activation" (page 60).
Charging the batteries
After reactivation, it is important that the batteries are charged. If an autostart generator is
present in the stand-alone grid, the Sunny Island will request the generator after a few
minutes.
5. Monitor the generator startup and check that the Sunny Island switches to charge mode.
6. Check for error-free functioning of all other energy generators in the system.
Battery Preservation Mode after Reactivation
If, after reactivation, the Sunny Island immediately switches into battery preservation mode
(see section 13.5 "Battery Preservation Mode" (page 99)), disconnect all loads from the
AC output (AC1 and AC2).
The loads can be reconnected once the Sunny Island enters charge mode. A precondition
for this is that a generator capable of providing the required power is connected
For more information refer to section 20.10 "Procedure During Emergency Charge Mode"
(page 201).
Technical Description
Activation and Deactivation
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