I know these are valid for the StellaZ thermostat:
Frost Protection: BASIC SET 0x01, THERMOSTAT MODE SET 0x00
Energy Saving: BASIC SET 0x00, THERMOSTAT MODE SET 0x0b
Comfort: BASIC SET 0xff, THERMOSTAT MODE SET 0x01
Direct Control: BASIC SET 0xfe, THERMOSTAT MODE SET 0x1f