HVACopediaKinghome · Heat pump
09 Debug menu item 09: forced operation
What the display is showing
Menu item 09 on the KU outdoor board display forces the system to run regardless of the thermostat. 01 starts forced cooling, 02 starts forced heating and OF stops the forced run. The choice is saved with SW1.
Applies to: Kinghome Ultranixx cold-climate KU36UHO and KU60UHO outdoor units with KU..UH2I and KD..UHI air handlers
What to do
- Hold SW1 about 5 s, short-press SW1 until 09 shows.
- SW2 or SW3 chooses 01 (cool), 02 (heat) or OF (off).
- Short-press SW1 to save.
Models that show this code
6 models in Kinghome Ultranixx
Other codes on the same units
- 01 Forced operation value: cooling
- 02 Forced operation value: heating
- 06 Debug menu item 06: forced defrost
- 08 Debug menu item 08: refrigerant recovery
- C4 ODU jumper cap error
- E1 High pressure protection / high-pressure sensor fault
- E3 Low pressure protection / low-pressure sensor fault
- E4 Compressor discharge temperature too high
Save it for the next call
Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.
Source: Kinghome Ultranixx cold-climate KU36/60UHO service manual GC202306, sec. 2.3.7 forced operation control. Summarized in our own words; check the original manual for your model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.