Royal Clima
Outdoor Unit Not Starting
Unit powers on but compressor and outdoor fan do not start; only indoor fan runs and no cooling or heating occurs.
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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
No power supply to outdoor unit, Loose wiring between indoor and outdoor terminals, Faulty outdoor main PCB, Failed compressor contactor (on non-inverter models)
How to Fix / Troubleshooting
Safety first: Turn OFF power at the breaker before inspecting wiring.
- Step 1 – Verify outdoor power: Check that the outdoor unit receives power (dedicated breaker ON, no blown fuses).
- Step 2 – Inspect interconnecting cable: Ensure the multi-core cable between indoor and outdoor units is correctly connected and tight at both terminal blocks.
- Step 3 – Listen for relay click: When calling for cooling, you should hear a click from the outdoor PCB or contactor. If not, the control signal may not be reaching the outdoor unit.
When to call a technician: If wiring is correct and the outdoor unit remains dead, the outdoor PCB or compressor starter components need professional diagnosis.
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Repair Difficulty
Medium
3/5
Required Part
Outdoor Main Control PCB
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