Fast and precise intervention on a Sharp Eco Inverter unit
At AirGreen , we regularly repair Sharp wall-mounted heat pumps in Boucherville , on the South Shore of Montreal. These Eco Inverter series units, renowned for their energy efficiency and quiet operation, require careful maintenance and monitoring to maintain their optimal performance.
Context of the intervention
Our team was contacted by a customer who noticed an abnormal noise when starting his heat pump and a noticeable decrease in air conditioning performance . The outdoor unit, securely installed on a galvanized steel wall bracket, clearly displayed the Sharp and AirGreen logos, a sign of professional installation already carried out by our technicians a few years earlier.
The problem manifested itself gradually: at first, a slight clicking noise, then a noticeable loss of cold inside. The unit, an 18,000 BTU Sharp Eco Inverter , seemed to struggle to reach the requested temperature, even in moderate weather.
Step 1: Complete System Inspection
Upon our arrival, we started with a visual and auditory check :
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The fan blades were spinning with difficulty.
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An intermittent metallic noise was coming from the compressor compartment.
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No error codes were displayed internally, but the discharge temperatures were abnormal.
Using our digital pressure gauges and a probe thermometer , we confirmed a pressure differential between low and high pressure, indicating insufficient refrigerant charge .
Step 2: Checking connections and leak testing
We turned off the power at the service breaker and removed the unit's cover. Our checks revealed a micro-leak at a slightly loose flare fitting, likely due to prolonged vibration of the unit.
To confirm, we used an electronic leak detector and a foaming solution , which allowed us to precisely locate the point of loss on the liquid line connection.
Step 3: Repair and Upgrade the System
The repair steps were carried out meticulously:
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Tightening and resealing the flare fitting with a calibrated torque wrench.
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Complete vacuuming of the refrigeration circuit to eliminate all humidity.
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Recharge with R32 (A2L) refrigerant , according to Sharp manufacturer's specifications.
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Verification of equilibrium pressures and performance tests at different ventilation speeds.
After restarting, the noise was gone and the measurements were perfect:
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Low pressure: 118 psi
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High pressure: 390 psi
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Indoor blowing temperature: 11.8°C
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Recovery temperature: 24°C
The system has regained full efficiency, once again ensuring stable and energy-efficient cooling .
Step 4: Maintenance Recommendations
We advised the client:
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Annual preventative maintenance , including cleaning the coils and checking the pressures.
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Installing an anti-vibration damper on the wall brackets to reduce mechanical stress on the connections.
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Performance monitoring via remote control (constant blowing temperature = good operation).
Final result
The intervention restored the performance and reliability of the Sharp Eco Inverter heat pump in less than two hours. The customer particularly appreciated the speed of the intervention and the accuracy of the diagnosis.
This repair perfectly illustrates our approach: rigorously diagnose, intervene cleanly, and guarantee the durability of each HVAC system installed by AirGreen in Montreal, Laval and on the South Shore .
Why trust AirGreen in Boucherville?
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Sharp and Midea certified technicians .
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Fast service and warranty on repairs.
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Compliance with A2L standards for new ecological refrigerants.
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Available 7 days a week for any urgent service call.
Thanks to our recognized expertise in residential and commercial HVAC systems, AirGreen ensures the comfort and peace of mind of thousands of homes across Greater Montreal.