A domestic water heating system has a hot water tank and a number of radiators. There is a
computerized management system which receives signals dependent on whether or not the
conditions for components are as they should be. The table below summarizes the signals
received:
Signal Value
0
A
1
0
1
0
1
B
C
Component
Water flow in the radiators is too low
Water flow in the radiators is within limits
Hot water temperature too high
Hot water temperature within limits
Water level in hot water tank too low
Water level in hot water tank within limits
