On SMA Sunny Central inverters, event 6456 means the circuit that pre-charges the DC link is defective. In the data log it can show up as a mismatch: the frequency of the AC voltage metering does not match the grid AC voltage. The manual lists the inverter behavior for this event as W. First check whether the inverter has the Q at night function and whether the QoDEna parameter is enabled. Next, check the pre-charging input fuses and the pre-charging feedback signal at SC20CONT terminals X14-8 and X14-9. If those checks find nothing wrong, contact SMA Service.
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affectsc1 verified · fact DC link precharge circuit
SMA Sunny Central event 6456 reports the DC link pre-charging circuit as defective.
sec=h1 h=ec77417e5497tbl=37.r10 h=adcbdb84beb6verified by: review-workflowverified on: 2026-10-23
Reported for Sunny Central central inverters (SC-XXX-CP-10, SC-XXX-JP, SC CP XT).
sec=h1 h=ec77417e5497tbl=37.r10 h=adcbdb84beb6review note: support check: partial - The passages name the Sunny Central and list SC-XXX-CP-10 and SC-XXX-JP, but SC CP XT is not mentioned.
presents_asc3 verified · fact AC voltage measurement mismatch
In the data log, the frequency of the AC voltage metering does not match the grid AC voltage.
sec=h1 h=ec77417e5497verified by: review-workflowverified on: 2026-10-23
detected_byc4 drafted · lead Fuse inspection
Check the pre-charging input fuses and the pre-charging feedback signal at SC20CONT terminals X14-8 and X14-9.
sec=h1 h=ec77417e5497c5 verified · fact Inverter settings review
First check whether the inverter has the Q at night function and whether the QoDEna parameter is enabled.
sec=h1 h=ec77417e5497verified by: review-workflowverified on: 2026-10-23
mitigated_byc6 verified · fact Contact manufacturer service
Contact SMA Service if the fuses and feedback check out OK, or straight away according to the operating manual.
sec=h1 h=ec77417e5497tbl=37.r10 h=adcbdb84beb6verified by: review-workflowverified on: 2026-10-23
related_to c4indicates c3