Air conditioner does not turn on at all, no lights on indoor unit, remote has no effect.

Safety first: Do not work on live circuits. Turn OFF the main breaker before opening covers.

• Step 1 – Check household breaker: Locate the breaker feeding the Royal Clima air conditioner and reset it if tripped. If it trips again immediately, do not force it; call a technician.
• Step 2 – Test outlet (if plug-in type): Plug another appliance into the same outlet to confirm power is present.
• Step 3 – Inspect indoor terminal block: Remove the indoor unit’s electrical cover and verify that L, N, and ground wires are tight and not burnt.
• Step 4 – Check indoor PCB fuse: Many Royal Clima indoor boards have a small glass or cartridge fuse. If blown, replace only with the same rating. If it blows again, a short circuit exists and needs professional repair.

When to call a technician: Repeated fuse or breaker trips indicate an internal fault that must be diagnosed by a professional.