Units C3 and C4 at Queensland’s Callide Power Station were taken offline last week following a control system fault, cutting output from the plant during peak summer demand.
Workers were evacuated from the power station as a precaution and as part of standard safety procedures, according to CS Energy.
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The company said in a statement, “Following a control system fault, Units C3 and C4 at the Callide Power Station had to be taken offline yesterday at 4.55pm. This was done in conjunction with Powerlink Queensland to ensure the safety of the process.
“We are working with the original equipment manufacturer of the control system to investigate the root cause of the fault.”
Both C station units are currently forecast to return to service in a staged manner on January 18, with Callide’s other two generating units (Units B1 and B2) still online.
The outage is the latest in a spate of failures at the state-owned generator.
Related article: Report reveals case to close Queensland’s “unreliable” Callide
In April 2025, Unit C3 suffered a major operational safety event that required it to be taken offline for months.
In May 2021, an explosion resulted in major damage to Unit C4. The incident initiated a cascading failure of nine major generator units across the state, which caused almost half a million Queensland customers to lose power.
