20 Troubleshooting SMA Solar Technology America LLC
216 SI4548-6048-US-BE-en-21 Operating Manual
W744 1 Internal CAN communication of slave 1 is interrupted
W745 1 Internal CAN communication of slave 2 is interrupted
W746 1 Internal CAN communication of slave 3 is interrupted
W747 1 Short circuit or cable break on transformer temperature sensor slave 1
W748 1 Short circuit or cable break on transformer temperature sensor slave 2
W749 1 Short circuit or cable break on transformer temperature sensor slave 3
W750 1 Short circuit or cable break on heat sink temperature sensor slave 1
W751 1 Short circuit or cable break on heat sink temperature sensor slave 2
W752 1 Short circuit or cable break on heat sink temperature sensor slave 3
W753 1 Invalid system time
F754 2 Communication with Multicluster Box interrupted
W755 1 Battery-preservation mode 1 (LBM)
W756 1 Battery-preservation mode 2 (LBM)
W757 1 Battery-preservation mode 3 (LBM)
F758 2 No output voltage measured from the main cluster
W759 1 No output voltage measured from slave 1 of main cluster
W760 1 No output voltage measured from slave 2 of main cluster
W761 1 No output voltage measured from slave 3 of main cluster
F781 4 Error at a slave which leads to shutdown of the system (for the
"RunMod" function)
F782 4 Failure of the grid monitoring
F783 2 Slave does not receive a Syncpuls
W784 1 Slave does not receive a Syncpuls Slave 1
W785 1 Slave does not receive a Syncpuls Slave 2
W786 1 Slave does not receive a Syncpuls Slave 3
W791 1 DSP reset detected on slave 1
W792 1 DSP reset detected on slave 2
W793 1 DSP reset detected on slave 3
W797 1 Failure of the grid monitoring slave 1
W798 1 Failure of the grid monitoring slave 2
W799 1 Failure of the grid monitoring slave 3
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