MHI · R410A Systems
This error indicates a refrigerant leak or a shortage of refrigerant in the system, specifically referenced by FDCVA151-251, affecting system performance.
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Turn off the main power to the AC system at the circuit breaker.
Visually inspect refrigerant lines for any signs of oil residue, which can indicate a leak.
Contact a qualified HVAC technician immediately to detect and repair refrigerant leaks, then recharge the system.
Do not operate the unit with low refrigerant, as it can cause severe damage to the compressor and other components.