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Fault codes › Sungrow › Sungrow SG250HX

Sungrow SG250HX 75

Code
75
Shown as
Inverter Parallel Communication Alarm
Page
95
ID
fc:sungrow-sg250hx-75
IRI
https://solarlattice.org/kb/fc/sungrow-sg250hx-75
Status
active
Also known as
75, Sungrow 75, Inverter Parallel Communication Alarm
Category
Inverters
Class warning drafted · lead
Production not stated
Clears not stated

Decoded

Reports communication loss; do: communication cable check.

What can be behind Communication loss

Failure modes that present as the reported condition, and the tests that tell them apart.

Tell apartByHow
Device firmware defect vs Monitoring network configuration fault drafted · leadCommunication test proposedSwitch the Modbus TCP server parameter off and back on. If communication returns, the problem is limited to Modbus TCP. If it stays down, check the network cabling and RJ45 connections.

Defined in

The manufacturer's own cause and corrective text is not reproduced here.

Same condition on other equipment

ABB / FIMER
ABB / FIMER PVS-60-TL W030
CPS
CPS SCA36KTL CommErr, CPS SCA50-60KTL CommErr
Fronius
Fronius Symo 420
SMA
SMA SB-US-40 10252, SMA SB-US-40 10284, SMA SB-US-40 10286, SMA SB-US-40 10341, SMA SB-US-40 10345, SMA SB-US-40 10346, SMA SB-US-40 10347, SMA SB-US-40 10348, SMA SB-US-40 10349, SMA SB-US-40 10350, SMA SB-US-40 10351, SMA SB-US-40 10352, SMA SB-US-40 10353, SMA SB-US-40 7619, SMA SB-US-40 8708, SMA SB-US-41 10249, SMA SB-US-41 10252, SMA SB-US-41 10284, SMA SB-US-41 10286, SMA SB-US-41 10341, SMA SB-US-41 10345, SMA SB-US-41 10346, SMA SB-US-41 10347, SMA SB-US-41 10348, SMA SB-US-41 10349, SMA SB-US-41 10350, SMA SB-US-41 10351, SMA SB-US-41 10352, SMA SB-US-41 10353, SMA SB-US-41 7619, SMA SB-US-41 8708, SMA SBSE-US-50 8104, SMA SBSE-US-50 8708, SMA SBSE-US-50 8709, SMA SBSE-US-50 8710, SMA SBSE-US-50 9308, SMA PEAK3-US 10249, SMA PEAK3-US 10252, SMA PEAK3-US 7619, SMA PEAK3-US 8101, SMA PEAK3-US 8708, SMA PEAK3-US 8709, SMA PEAK3-US 8710, SMA CORE1-US 10249, SMA CORE1-US 10252, SMA CORE1-US 10284, SMA CORE1-US 10286, SMA CORE1-US 7619, SMA CORE1-US 8101, SMA CORE1-US 8102, SMA CORE1-US 8103, SMA CORE1-US 8104, SMA STP-TL-US 8101-8104, SMA STP-TL-US 8708, SMA STP-TL-US 8709, SMA STP-TL-US 8710, SMA STP-X-US 8708, SMA STP-X-US 8709, SMA STP-X-US 8710, SMA SI-US F733, SMA SI-US F754, SMA SI-US W734, SMA SI-US W735, SMA SI-US W736, SMA SI-US W857, SMA SI-US W867, SMA SI-US W877, SMA SI-US W887
Solis
Solis S6-EH2P CAN Fail, Solis S6-EH3P30-60K CAN Fail, Solis S6-EH3P75-150K CAN Fail, Solis S6-GC DRM LINK Fail, Solis S6-GU DRM LINK Fail
Sungrow
Sungrow SG200HX 514, Sungrow SG200HX 75, Sungrow SG250HX 514, Sungrow SG350HX 514, Sungrow SG350HX 75
Yaskawa Solectria
Yaskawa Solectria XGI-1500-1MW WARN-28, Yaskawa Solectria XGI-1500-DCG WARN-28, Yaskawa Solectria XGI-1500 WARN-28

Same code in other families

Claims

defined_in

c1 drafted · lead SG250HX-US-UEN-Ver17-202203

reports

c2 verified · fact Communication loss

verified by: review-workflowverified on: 2026-10-20

mitigated_by

c3 drafted · lead Communication cable check

has_event_class

c4 drafted · lead Warning (device continues, a condition is flagged)

applies_to

c5 drafted · lead Sungrow SG250HX-US

Data