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A homeowner at Sembawang Hills Estate contacted Homeone after their air conditioner stopped cooling following a refrigerant top-up by a handyman. Suspecting a leak, we conducted a site assessment, but the gas pressure test showed optimal levels, ruling out a leak.
We checked the communication cables and found them in perfect condition. Despite the system appearing to operate normally, the air outlet of the fan coil unit remained warm, suggesting a deeper issue with the refrigerant quality or potential contaminants.
After reviewing the findings, Homeone's office team identified the problem as likely due to low-quality refrigerant or contaminants like moisture or air. We recommended a complete refrigerant renewal, ensuring the service would be carried out by our BCA-trained installers, and proceeded with the homeowner's approval. Following the renewal, the Mitsubishi MUY-GE15VA restored its optimal cooling performance, consistently achieving the desired air outlet temperatures.
Mitsubishi MUY-GE15VA
Mitsubishi MSY-GE15VA
The service was needed because the aircon stopped cooling after a handyman’s refrigerant top-up.
Despite ruling out a leak through pressure tests, the cooling issue persisted, likely due to low-quality refrigerant or contaminants.
A refrigerant renewal was recommended and approved to restore functionality.
Temperature Analysis: Begin by measuring the air conditioning system’s current temperature output to assess its existing cooling performance.
Pressure Gauge Test: Use a pressure gauge to measure the system’s pressure levels.
Compare the readings against the manufacturer’s specifications to detect any discrepancies that could indicate a leak or system inefficiency.
Discharge: Safely discharge the old refrigerant from the system using appropriate equipment and in compliance with environmental regulations.
Proper discharge is crucial to avoid contamination and ensure the system is ready for a new charge.
Vacuuming: After discharging, perform a deep vacuuming of the refrigerant lines to remove any residual moisture, air, or contaminants inside the system.
This process cleans the interior of the refrigerant pipes, ensuring optimal conditions for the new refrigerant to function efficiently.
Recharge the air conditioning system with the 1.15kg refrigerant according to the manufacturer’s exact specifications.
Accurate measurement and careful handling are essential to maintain the system’s performance and prevent overcharging or undercharging, which could lead to inefficiencies or damage.
Conduct a temperature analysis by measuring the air temperature at various points in the system, both before and after the recharge.
This analysis ensures that the system is cooling effectively and that the refrigerant is circulating properly. Adjustments may be made based on these readings to fine-tune performance.
The work area is thoroughly cleaned after installation to remove any debris or materials left behind, ensuring the space is tidy and free of hazards.
As per Regulation 41C of the Building Control Regulations 2003, the trained air-conditioning unit installer must:
Failure to do so may result in a penalty of up to $5,000 or jail term of up to six months or to both.
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