Automated diagnostics of electronic instrumentation in a system for fracturing a well and associated methods

A diagnostic control assembly comprising:

• one or more temperature sensors positioned to generate one or more sensor signals indicative of operating temperatures associated with one or more hydraulic fracturing units;
• and
• a supervisory control unit configured to:
• (a) receive the one or more sensor signals and to determine an extent to which a fan disposed on each of the one or more hydraulic fracturing units is effectively cooling the respective hydraulic fracturing unit below a minimum cooling effectiveness responsive to historical data and the one or more sensor signals, the historical data being associated with operation of the one or more hydraulic fracturing units during prior operation;
• and
• (b) compare the historical data to the one or more sensor signals responsive to a temperature change associated with the one or more hydraulic fracturing units to the historical data.

A diagnostic control assembly comprising:

• one or more pressure sensors positioned to generate one or more sensor signals indicative of one or more operating pressures associated with:
• (a) one or more hydraulic fracturing units, or (b) one or more manifolds associated with the one or more hydraulic fracturing units;
• and
• a supervisory control unit configured to:
• receive the one or more sensor signals;
• determine an average pressure associated with one or more of a fluid in the manifold or a fluid in the one or more hydraulic fracturing units, and
• identify at least one of the one or more pressure sensors as generating a signal of the one or more sensor signals indicative of a pressure outside a pressure range of the average pressure.