When the system is expecting to meter flow and is unable to do so, it is typically due to either a blockage, pump not running high enough, or simply a closed valve; the closed valves could potentially be manual ones inadvertently left closed, or it could be automatic valves not responding.

Ensure there isn't a blockage before troubleshooting automatic valves. Always check that a valve(s) in question can run in Manual Mode when troubleshooting No Flow Errors.