9 Troubleshooting SMA Solar Technology AG
58 SI60H-80H-BE-en-20 Operating Manual
F 754 BoxCom 2 Communication with Multicluster Box
is interrupted.
•
Ensure that undamaged CAT5e
cables are used for communication
and that the cables are plugged in
correctly.
•
Ensure that the communication bus
is equipped with a terminator at
both ends.
W 755 LoBatMod1 1 Battery protection mode protects the
battery. Level 1 is active.
• Disconnect the loads, start the
generator, start the Sunny Island
and charge the battery.
W 756 LoBatMod2 1 Battery protection mode protects the
battery. Level 2 is active.
W 757 LoBatMod3 1 Battery protection mode protects the
battery. Level 3 is active.
F 758 McNoVtg 2 Voltage of the main cluster cannot be
measured at the master.
• Ensure that all circuit breakers of
the Sunny Island inverters in the
Multicluster Box are closed.
•
Ensure that the cabling at terminal
AC1 is correctly installed.
W 759 McNoVtgSv1 1 Voltage of the main cluster cannot be
measured at slave 1.
W 760 McNoVtgSlv2 1 Voltage of the main cluster cannot be
measured at slave 2.
F 781 SlvError 4 Error at a slave in the main cluster
causing system shutdown.
•
Read off the pending and logged
warnings and errors and eliminate
the causes.
F 782 AIVtgMonFail 4 Monitoring of the utility grid has
failed.
• Contact the SMA Service Line.
F 783 CANCom 2 Synchronization in the cluster is
interrupted at the master.
•
Ensure that undamaged CAT5e
cables are used for communication
and that the cables are plugged in
correctly.
•
Ensure that the communication bus
is equipped with a terminator at
both ends.
W 784 CANComSlv1 1 Synchronization in the cluster is
interrupted at slave 1.
W 785 CANComSlv2 1 Synchronization in the cluster is
interrupted at slave 2.
F 787 VcoreFail 3 Internal device voltage in the master
is outside the tolerance limits.
• Contact the SMA Service Line.
F 788 VcoreFailSlv1 3 Internal device voltage in slave 1 is
outside the tolerance limits.
F 789 VcoreFailSlv2 3 Internal device voltage in slave 2 is
outside the tolerance limits.
W 791 RsDspSlv1 1 Signal processor has performed a
reset.
• Contact the SMA Service Line.
W792 RsDspSlv2 1
No. Name Level Cause Corrective measures
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