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Christopher JohnsonSep 14, 2025
What to do if my SystemAir Fan has low supply air temperature?
- Nnicole74Sep 14, 2025
If the supply air temperature from your SystemAir Fan is low, begin by checking the display for any alarms. Also, verify if the defrosting function is running in the HMI screen. Then, check the set supply air temperature in the HMI. Ensure that ECO mode is not activated, as it prevents the heater from activating. Also, see if user modes like HOLIDAY, AWAY, or CROWDED are activated in the HMI or via a hardwired switch. Check the analogue inputs in the service menu to verify that the temperature sensors are functioning correctly. If there is an electrical re-heater installed, check if the overheat protection thermostat is active and reset it if necessary. Finally, consider whether a re-heater battery is needed, especially in very cold outdoor conditions.
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