SMA Off-Grid Systems - Manual (Page 41)

SMA Solar Technology AG 7 Commissioning
Installation - Quick Reference Guide Off-Grid-IS-en-30 41
7.5 Testing the Generator
Requirement:
☐ The Sunny Island must be in operation (see Section 7.3 "Starting the System", page 40).
Procedure:
1. Switch on the protective devices for the generator in the AC distribution board.
2. Connect the circuit breakers of the AC loads.
3. Close the load-break switch of the generator.
☑ The generator starts.
✖ Does the generator not start?
The generator management does not request the generator.
• On the Sunny Remote Control, select the setting page Generator > Mode in user mode and set to Start.
This starts the generator manually (see the Sunny Island inverter operating manual).
The control cable connected does not transmit the start signal.
• Eliminate faults in the wiring.
The generator is not ready for operation.
• Find out possible causes using the manual from the manufacturer and eliminate these.
4. Check whether the parameter Generator > Power displays the feed-in power on the Sunny Remote Control in user
mode. This ensures that the Sunny Island has switched the stand-alone grid to the generator after completing the
warm-up time 234.12 GnWarmTm.
If no power is displayed after completion of the warm-up time, check the error messages:
• Select the 410# Error active menu and rectify the cause of the displayed warning or error (see the Sunny Island
inverter operating manual).
7.6 Testing the Load Shedding
Requirements:
☐ This system is not a multicluster system. Load shedding is part of the Multicluster Box in multicluster systems.
☐ The Sunny Island must be in operation (see Section 7.3 "Starting the System", page 40).
Procedure:
1. Switch to installer mode on the Sunny Remote Control (see Section 7.1, page 39).
2. Select the parameter of the multifunction relay for the load-shedding contactor, e.g., 241.02 Rly2Op for the
Relay2 multifunction relay of the master.
3. Note the parameter value.
4. Set the parameter to Off.
☑ The load-shedding contactor sheds the loads.
✖ Does the load-shedding contactor not shed the loads?
The multifunction relay for triggering the load-shedding contactor was incorrectly configured.
• Check the configuration and eliminate the fault.
There is a fault in the wiring of the load-shedding contactor.
• Ensure that the multifunction relay is correctly wired.
5. Set the parameter to the setting that has been noted down.