back2space
23-10-2008, 02:44 AM
Guys
Just had a call in tonight where the site were complaining of being too hot. The controller is locked through the internal functions where the site can only adjust set point and fan speeds and not the operating mode (heat/cool) it is left in Auto mode... the triangle.
There is an option in the controller to be able to stop the user changing the operation mode on the controller. However we assumed that if we left it on automode that when the user altered setpoint that the system would changeover if needed.
Max set point is 24C and min is 22c however the room is never entering cooling mode.
Having checked that the outdoor is running when it is set to 22C the outdoor isnt running and only seems to be running on heating mode.
However if we enable the mode changeover function in the controller and switch it onto cooling manually, the system works fine.
So our guess is this, if the system was set to the autochangeover (triangle mode) and was calling for heating then when you disable the changeover function so that it is locked to the auto mode the system cannot even change over to cooling on the automode due to the function being disabled.
We always thought this would be possible in automode even if the changeover function was disabled as we thought this just stopped the user messing about with it.
Thought would share this with you.
Just had a call in tonight where the site were complaining of being too hot. The controller is locked through the internal functions where the site can only adjust set point and fan speeds and not the operating mode (heat/cool) it is left in Auto mode... the triangle.
There is an option in the controller to be able to stop the user changing the operation mode on the controller. However we assumed that if we left it on automode that when the user altered setpoint that the system would changeover if needed.
Max set point is 24C and min is 22c however the room is never entering cooling mode.
Having checked that the outdoor is running when it is set to 22C the outdoor isnt running and only seems to be running on heating mode.
However if we enable the mode changeover function in the controller and switch it onto cooling manually, the system works fine.
So our guess is this, if the system was set to the autochangeover (triangle mode) and was calling for heating then when you disable the changeover function so that it is locked to the auto mode the system cannot even change over to cooling on the automode due to the function being disabled.
We always thought this would be possible in automode even if the changeover function was disabled as we thought this just stopped the user messing about with it.
Thought would share this with you.