Use the product and unit's recovery guidance before normal fixture use resumes. The stage reached and chemical still present matter.
What the observation means
A power cut, unexpected flush and incomplete rinse are different interruptions. Do not assume restarting from the beginning is always appropriate.
A useful next step
Record the product, amount and last completed step, then seek manufacturer advice if the instructions do not cover the situation. Do not mix cleaners, add more concentrate or open the casing to inspect the liquid. Keep connected fixtures unavailable while the condition is uncertain.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.