Repair of a Sharp wall-mounted heat pump in Sainte-Dorothée

Accurate diagnosis and refurbishment of a faulty Sharp ECO Inverter system

Recently, our AirGreen team was called to Sainte-Dorothée (Laval) for a service call on a Sharp ECO Inverter wall-mounted heat pump , a model known for its performance and Plasmacluster Ion technology. Despite its reliability, this unit had been exhibiting insufficient cooling and abnormal noise during operation for several days.

First observation: a compressor operating irregularly

On site, our technician observed that the outdoor fan was running intermittently and that the compressor was shutting down prematurely , indicating a fault in the electronic control circuit . The Sharp unit, although in generally good condition, displayed an error code indicating a power supply anomaly to the inverter module .

Step 1: Visual inspection and electrical tests

We started by:

• Check the electrical connections and wiring of the Inverter module;

• Test the input and output voltage of the main PCB ;

• Examine the condition of the start capacitor and the temperature sensor .

Result: the fan control circuit had a cracked solder joint, probably due to prolonged micro-vibration over the years.

Step 2: Repair and calibration

Our team proceeded to:

• A complete overhaul of the electronic module (resoldering and cleaning with isopropyl alcohol);

• The Sharp rotary compressor check ;

• Cleaning the condenser fins to restore optimal airflow;

• Recalibrating the Inverter module according to the manufacturer's specifications.

Once power was restored and connections tightened, the heat pump resumed stable operation with reduced inrush current and increased efficiency .

Step 3: Cleaning and performance testing

To ensure perfect operation, we have added:

• Complete cleaning of the fan and the external grille ;

• Monitoring refrigeration pressures using digital pressure gauges;

• A check of the indoor airflow to confirm the proper distribution of cold and heat.

The final measurements confirmed optimal performance , with the blown air temperature perfectly conforming to the specifications of the ECO Inverter model.

Technical details of the intervention

Why Sharp Plasmacluster Technology Deserves Specialized Interview

The Sharp ECO Inverter series uses advanced ionization technology, designed to purify ambient air by neutralizing particles and bacteria. However, this sophisticated electronic technology requires rigorous maintenance and precise interventions to prevent malfunctions in the control module.

At AirGreen, we know these systems perfectly: our team has the diagnostic tools specific to Sharp , guaranteeing safe repairs that comply with the manufacturer's standards.

A lasting repair and a satisfied customer

After our intervention, the Sharp heat pump regained exemplary stability . The client, who feared having to replace the unit, was pleasantly surprised by the complete restoration without any major replacements .

We recommended:

• Annual maintenance to prevent weld corrosion;

• A monthly filter cleaning to maintain optimal airflow;

• A preventative inspection at each change of season .

Thanks to our rigorous approach, the system now works like new — ready to offer consistent comfort, summer and winter.

---

AirGreen: your HVAC expert in Laval and throughout Greater Montreal

Whether it's for Sharp heat pump repair , maintenance , or installation, AirGreen is your trusted partner in Montreal, Laval, Longueuil, the North Shore, and the South Shore . We respond quickly, using original parts and professional diagnostics that guarantee the longevity of your HVAC equipment.

Need service on your Sharp heat pump?
Contact AirGreen today for a quick and efficient appointment with our certified technicians.