Test Mode

Test mode for Independent heating/ventilation with interchanged temperature threshold
1. Switch ignition key to position "R".
2. Press BC button "Time".
3. Simultaneously depress BC buttons "Time" and "A-Temp." for approximately 3 seconds until "In heat" or "In vent" appear in the display.
4. Press BC button S/R (LEDs in Time button flash), independent heating/independent ventilation operates (after starting, allow independent heating to run for at least 5 minutes).
5. Press the "S/R" button to terminate inverse mode.

NOTE: The relay box only switches the IHKA control unit to independent heating in ignition switch position "0". In this position, however, inverse mode is cancelled by the on-board computer. If only a multitunction clock is installed, it can also be switched to inverse mode by pressing the outside temperature button (3 seconds).