Indoor unit shows F0 and stops cooling; may occur shortly after startup.

Safety first: Do not attempt to open the refrigeration circuit yourself. Refrigerant handling requires certification.

• Step 1 – Visual leak inspection: With power OFF, inspect flare joints, service valves, and coil connections for oily residue or greenish stains, which indicate leaks.
• Step 2 – Check insulation: Ensure suction line insulation is intact and not soaked with oil.
• Step 3 – Do not continue operation: Running the unit with low refrigerant can overheat the compressor. Turn the unit off until serviced.

When to call a technician: F0 requires a certified technician to locate the leak, repair it, evacuate the system, and recharge with the correct type and amount of refrigerant specified by Royal Clima.