F7
Mitsubishi Electric
Indoor Unit Address Conflict or Capacity Mismatch
Indoor unit displays F7, often in multi-split systems
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Duplicate indoor addresses on multi-split, Incorrect capacity setting on indoor PCB, Incompatible indoor unit connected to outdoor system, Incorrect DIP switch settings
How to Fix / Troubleshooting
Safety first: Turn off power to the entire system before changing address or DIP settings.
Steps:
- Verify addresses: On each indoor unit, check the address DIP switches or rotary selectors. Ensure each indoor has a unique address as per the installation manual.
- Check capacity settings: Confirm that capacity or model selection switches on the indoor PCB are set correctly for the installed unit.
- Confirm compatibility: Ensure that all indoor units are approved for use with the specific outdoor model (consult Mitsubishi Electric documentation).
- Reinitialize system: After correcting settings, power cycle the entire system and allow the outdoor unit to re-scan indoor units.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Indoor PCB Address/DIP Settings
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements