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A missing proof is not yet a failed part

Fictional RPH-1 heat-controller desk trainer, H1 revision1. Supplied virtual records only. All values are fictional problem data; no equipment operation.

Customer says: The blower runs but the heater permission never comes on. Someone suggested a new proof device.

The supplied drawing and state table identify R, B, P and H. Physical airflow and the sensing path have not been measured in this file.

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