Petaling Jaya | February 16, 2026 — EKG M&E Sdn Bhd has successfully completed a critical maintenance intervention at PJ City, focusing on the diagnostic and repair of a refrigerant gas leak within a high-capacity Air Handling Unit (AHU). In a commercial hub like PJ City, AHUs are vital for maintaining large-scale climate control; a loss of refrigerant not only reduces cooling capacity but also significantly increases energy consumption and risks compressor failure.
Scope of Work: Pressure Testing, Leak Point Identification, and Refrigerant Top-up
During a routine performance audit at the PJ City facility, our team identified several symptoms of a compromised refrigerant circuit:
Diminished Cooling Capacity: The AHU was failing to meet its setpoint temperature, leading to "warm zones" within the building.
Low Suction Pressure: Initial gauge readings indicated a significant drop in refrigerant levels, suggesting a breach in the copper piping or coil headers.
Ice Accumulation: Observations showed localized frost on the evaporator coils—a classic sign of a "starved" coil caused by a gas leak.
To ensure a permanent fix rather than a temporary "top-up," our technicians implemented a rigorous leak-detection sequence:
Electronic Leak Detection: Using high-sensitivity electronic sniffers, the team audited all brazed joints, flare connections, and the evaporator coil surface to pinpoint the exact source of the escaping gas.
Pressure Testing (Nitrogen Purging): Once the suspected leak was identified, the system was isolated and pressurized with Dry Nitrogen. This allows for safe "bubble testing" and confirms that the system can hold its rated pressure before the introduction of new refrigerant.
Joint Rectification: Our mechanical team performed precision brazing on the identified leak points, ensuring a high-strength, airtight bond.
Vacuum Dehydration: After the repair, the circuit was subjected to a deep vacuum to remove all moisture and non-condensable gases, which is essential for protecting the compressor's longevity.
Precision Charging: The system was recharged with the specified refrigerant gas, carefully weighed to match the manufacturer’s nameplate data for optimal Superheat and Subcooling values.
Restored Thermal Efficiency: The AHU is now back to its peak cooling specification, ensuring a comfortable environment for all occupants at PJ City.
Asset Protection: By addressing the leak promptly, EKG prevented "liquid slugging" and motor burnout, saving the client from the high cost of a compressor replacement.
Energy Savings: A fully charged system operates with shorter cycle times and lower amperage draw, directly reducing the facility's monthly utility expenditure.
Based in Selangor, EKG M&E Sdn Bhd is a premier MEP specialist serving Malaysia's corporate and industrial sectors. We combine advanced diagnostic tools with meticulous mechanical skill to keep your infrastructure running at maximum efficiency. From PJ City to large-scale industrial plants, we are your partner in technical excellence.
Is your AHU struggling to maintain temperature or showing signs of frost? Contact us today for a professional refrigerant audit and a custom-engineered maintenance proposal.
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