H0
Royal Clima
EEPROM Parameter Error / Configuration Fault
Indoor unit shows H0, unit may not start or may operate only in fan mode.
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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.
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Possible Causes
Corrupted firmware on indoor PCB, Incorrect PCB replacement without proper configuration, Power surge damaging memory IC, Loose connection between main PCB and display board
How to Fix / Troubleshooting
Safety first: Disconnect power before opening the indoor unit.
- Step 1 – Power reset: Turn OFF the breaker for 10–15 minutes, then restore power and test again.
- Step 2 – Check PCB connections: Remove the front cover and verify that all connectors between the display board and main PCB are secure.
- Step 3 – Confirm correct PCB: If the PCB was recently replaced, verify that the correct Royal Clima board model was installed for your unit.
When to call a technician: If H0 persists, the PCB may need reprogramming or replacement, which must be done by an authorized service center.
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Repair Difficulty
Hard
4/5
Required Part
Indoor Main Control PCB
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