What are the dimensions of the hole for mounting the glass frame?
The dimensions of the hole is 55mm.
Does it support programming?
Yes,support programming.
Why does the system display an ERR 1 error?
This is because the thermostat's "Sensor Selection" is set to "OUT" for an external sensor, but no external sensor is actually connected to the thermostat, resulting in the ERR1 error code. Simply set
