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Fault codes › Canadian Solar › CSI-75/80/90/100K-T480GL02-U

Canadian Solar 75-100K-T480GL02 GRID-INTF

Code
GRID-INTF
Shown as
Grid unstable
Page
36
ID
fc:canadian-solar-75-100k-t480gl02-gridintf
IRI
https://solarlattice.org/kb/fc/canadian-solar-75-100k-t480gl02-gridintf
Status
active
Also known as
GRID-INTF, gridintf, Canadian Solar GRID-INTF, Grid unstable
Category
Inverters
Class fault verified · fact
Production not stated
Clears not stated

Decoded

Reports grid instability; confirm with waveform spectrum analysis, grid voltage measurement; do: grid impedance matching.

What can be behind Grid instability

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

Defined in

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

Same condition on other equipment

ABB / FIMER
ABB / FIMER PVS-166-175-TL W003, ABB / FIMER PVS-60-TL W003, ABB / FIMER TRIO-20.0-27.6-TL W003, ABB / FIMER UNO-DM-3.3-5.0-PLUS W003, ABB / FIMER UNO-DM-6.0-PLUS W003
Canadian Solar
Canadian Solar 125K-T600GL02 GRID-INTF, Canadian Solar 125KTL-GS-E GRID-INTF, Canadian Solar 185-255K GRID-INTF01/02, Canadian Solar 25-40K-T480GL01 GRID-INTF, Canadian Solar 25-40KTL-GS-FL GRID-INTF, Canadian Solar 50-66K-T480GL01 GRID-INTF, Canadian Solar 50-66KTL-GS-FL GRID-INTF
Huawei
Huawei SUN2000-100KTL-USH0 2038
SMA
SMA SB-US-41 404, SMA SBSE-US-50 404, SMA STP-TL-US 404, SMA STP-X-US 404, SMA SC-CP-XT 404
Solis
Solis 1P-4G-US GRID-INTF, Solis 3P-5G-US GRID-INTF01/02, Solis RHI-1P-HV GRID-INTF01/02, Solis S5-GC GRID-INTF, Solis S6-EH1P GRID-INTF01/02, Solis S6-EH2P G-F-GLU, Solis S6-EH2P GRID-INTF, Solis S6-EH2P GRID-INTF02, Solis S6-EH3P30-60K G-F-GLU, Solis S6-EH3P30-60K GRID-INTF, Solis S6-EH3P30-60K GRID-INTF02, Solis S6-EH3P75-150K G-F-GLU, Solis S6-EH3P75-150K GRID-INTF, Solis S6-EH3P75-150K GRID-INTF02, Solis S6-GC GRID-INTF, Solis S6-GU GRID-INTF

Same code in other families

Claims

defined_in

c1 drafted · lead CSI Installation Manual 75-100K T480GL02-U USA V1.1 20211116

reports

c2 verified · fact Grid instability

verified by: review-workflowverified on: 2026-10-23

detected_by

c3 drafted · lead Waveform spectrum analysis

Harmonic distortion test on AC line.

c4 drafted · lead Grid voltage measurement

mitigated_by

c5 verified · fact Grid impedance matching

verified by: review-workflowverified on: 2026-10-23

has_event_class

c6 verified · fact Fault (device stops or needs intervention)

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - It is in the Table 8.1 Fault messages, but the passage does not state the device behavior (stops or needs…

applies_to

c7 drafted · lead CSI-75/80/90/100K-T480GL02-U

Data