Simulators › Diagnostic Simulator
BAS Diagnostic Simulator
Twenty building automation faults, each one a real call from BAS Field Fundamentals. The graphic tells you what the system believes. Your job is to find out what’s true — and which layer stopped telling the truth.
- Read the work order and the graphic
- Ask, read the BAS, go to the equipment
- Make the call: which layer, what cause
More simulators: the BACnet & network lab and the Modbus & LonWorks capture lab →
Choose a case
- Case 1The damper that says 100% VAV box 4-12
- Case 2Run command, no fan AHU-2 supply fan
- Case 3The drive that keeps faulting CHWP-2 and its VFD
- Case 4Cooling that runs and does nothing AHU-3
- Case 5The sensor that reads right at the sensor Office 218 temperature sensor
- Case 6The isolation room that passes Isolation room 407 pressure monitor
- Case 7Humidity reading zero OR 3 humidity transmitter
- Case 8Proof says off, motor is running Exhaust fan EF-12
- Case 9Pump on, no pressure HWP-1 hot water pump
- Case 10The economizer that isn't AHU-4 economizer
- Case 11The freezestat that keeps tripping AHU-1 (100 % outside air)
- Case 12Everybody is complaining AHU-5 and six VAV boxes
- Case 13One zone, no neighbours VAV box, conference room 3W
- Case 14The loop that hunts AHU-3 discharge air loop
- Case 15The average that isn't Nursing unit 5N average space temp
- Case 16The valve that is closed VAV reheat box 2-14
- Case 17Commanded speed, actual speed AHU-6 supply fan
- Case 18Airflow reads zero AHU-1 airflow station
- Case 19The alarm that cried wolf Zone 3-22 high-temperature alarm
- Case 20Works in hand, not in auto CWP-1 condenser water pump
Every case is in the book
BAS Field Fundamentals walks through all twenty — plus the method, the meter tests and the troubleshooting matrix behind them.
Work order
Swipe the graphic sideways to see the whole unit.
Evidence by layer
Between the complaint and its cause there’s a stack. The fault lives at exactly one level of it.