Exhaust fan command and status signals are mismatched

Objective/Method/Outcome

Objective: Determines if the command and status signals of the exhaust fan are matching

Method: Compares the Command and Status to check if the command and status signals are active at the same time, to find out the hours of fault.

Outcome: Trigger an insight if the hours of fault are greater than the acceptable hours of fault.

Description

Compares the status and command signals to determine if there is a mismatch.

This rule is part of the CopperTree Standard rule-set.

Default Priority

High

Diagnosis

  1. Check if the equipment is manually overridden.
  2. Check interfacing relays.
  3. Check status sensors.

Message

Exhaust fan command-status signals do not match. Please investigate unit control.

Logic

Logic for determining if exhaust fan command and status matches

Inputs

InputUnitTagsDescription
CommandExhaust Air Fan CommandThe recorded exhaust air fan command
StatusExhaust Air Fan StatusThe recorded exhaust air fan status
Acceptable Hours of Fault per WeekThe allowable hours of fault. If the fault exceeds this threshold, an insight is triggered.
Cost per Hour $The cost of fault per hour
Days of operation annually The yearly days of operation. This is used to project potential annual savings

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