E6
Olimpia Splendid
Communication Failure Between Indoor and Outdoor Units
E6 displayed; indoor and outdoor units do not respond correctly; no cooling or heating
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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
Open or shorted communication cable, Reversed polarity on indoor/outdoor terminals, Loose terminal screws, Faulty indoor or outdoor main PCB communication circuit
How to Fix / Troubleshooting
Safety: Isolate power to both indoor and outdoor units before touching wiring terminals.
- Verify wiring connections: Open the indoor and outdoor electrical covers. Compare the terminal labels (e.g., 1-2-3, L-N-S) and ensure the same wire colors are connected to the same numbers at both ends.
- Tighten terminals: Loose screws on the communication terminals are a common cause. Tighten all terminal screws firmly without over-torquing.
- Inspect cable: Follow the interconnecting cable between indoor and outdoor Olimpia Splendid units. Look for damage from UV, rodents, or pinching.
- Check polarity: If the system uses polarity-sensitive terminals, ensure L and N are not swapped and that signal wires are correctly matched.
- Power cycle: After correcting any wiring issues, turn off power to both units for 5–10 minutes, then restore power and test.
- Advanced diagnostics: If wiring is correct and E6 persists, one of the PCBs may have a failed communication circuit. This requires board-level diagnosis and replacement by a qualified technician.
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Repair Difficulty
Hard
4/5
Required Part
Indoor-Outdoor Communication Cable
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