Update problem HVAC & LCD

The output connection Integral(setpoint-Inside) temp is the Integral (as in Proportional, Intergral, Differential control signals) of the setpoint minus the inside temperature.
That is a slowly changing signal that represents how close the room temperature is to what you want.
The principle purpose of this analogue output is for use with more complex heating algorithms. You have connected it to a line on the LCD.

When this output changes, it informs the LCD. The LCD then questions the sender (the HVAC) for text representing its output and the HVAC offers a suitable message for the LCD.

Previously any request by an LCD line for a message (from any connection) always offered the same message which was the status of the HVAC. That is, the setpoint and room temperature together with symbols which indicate if it is heating or not.

In the Cortex update the message now represents the actual output connection. That is, you will get displayed the (I)ntegral value of the (S)etpoint minus the (I)nside temp. Hence the letters IS-I. Why would anyone want this? Ours is not to reason why!

To get the display you previously had, what you need to do is change the connections from the LCD to the HVAC. Remove the connection to the HVAC integral output and instead connect it to the 'Status changed' output.

Viv.

Ah I see, Many thanks for the quick reply. All ok now

Thanks

Simon