There are at least 21 different faults that a Fan Coil Unit can have.
In our experience it is very common in maintenance callouts for fault to be repaired inaccurately. The immediate problem may be temporarily fixed, but the solution is not long term.
An example of this, is turning up the temperature, when the fault is that the unit is permanently in cooling. This provides a temporary fix by mixing hot and cold water, but it is not a permanent solution.
FCUs that are permanently heating or cooling is a common problem because usually these faults pass a maintenance test.
We aim to provide systems that are 100% correctly maintained. This can be a long process. In the short term we use the control technology to minimise the effects of any faults.