H7
Fujitsu
Indoor Unit Capacity or Port Assignment Error (Multi-Split)
Indoor unit shows H7, unit may not operate multiple indoor units correctly (multi-split)
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
Incorrect indoor unit connection to outdoor ports, Addressing conflict between indoor units, Wiring errors on multi-port outdoor unit, Faulty communication PCB
How to Fix / Troubleshooting
Safety first: Turn off power to the entire multi-split system before opening any covers.
- Verify wiring: Check that each indoor unit is wired to the correct terminal block on the outdoor unit as per the wiring diagram.
- Check addresses: Ensure each indoor unit has a unique address setting and that it matches the outdoor unit configuration.
- Label cables: If multiple cables are present, label them to avoid cross-connection.
- System reset: After corrections, power down for 5 minutes, then restore power and test each indoor unit individually.
- Technician support: If H7 persists, a Fujitsu technician may need to reconfigure or replace the communication PCB.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Multi-Split Communication PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements