Friedrich FSHSW36A3A Installation And Operation Manual page 47

Wired Controller(Optional)
3.9 E-heater Setting
E-heater (auxiliary electric heating function): In the Heating mode, E-heater is allowed to be
Once the wired controller or the remote controller enters the Heating mode, this function will be
turned on automatically.
Press Function in the Heating mode to enter the E-heater setting interface and then press
Enter/Cancel to cancel this function.
Press Function to enter the E-heater setting status, if the E-heater function is not activated,
and then press Enter/Cancel to activate it.
The setting of this function is shown as Fig.3.9.1 below:
Fig.3.9.1 E-heater Setting