Expert intervention on a damaged outdoor unit
On a beautiful June morning, our AirGreen team was called for a service call in Verdun , in a typical Montreal residential building. The customer reported that his Fujitsu Halcyon wall-mounted heat pump was no longer starting and that an abnormal noise had been heard just before the complete breakdown. Upon our arrival, a quick inspection of the outdoor unit immediately revealed a crucial clue: the front panel was cracked and partially detached , revealing signs of water infiltration and oxidation on the electrical box.
Complete diagnosis: between humidity and corroded electronic components
This Fujitsu Halcyon wall-mounted heat pump had been in operation for about eight years, a model well known for its quiet performance and durability. However, direct exposure to the elements without a protective cover accelerated the degradation of certain components.
Our technicians carried out a complete diagnosis in several stages :
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Power supply check : the input voltage was correct, ruling out a building power supply problem.
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Visual inspection of the electrical box : presence of corrosion on the main relay terminal and on the control board.
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Compressor start current measurement : total lack of response, confirming that the command was not going to the compressor.
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Continuity test : break found on the main track of the electronic card (PCB) .
Repair steps: precision and rigor signed AirGreen
1. Securing and cleaning
We first disconnected the power supply and removed the damaged cover to access the module's interior. A thorough cleaning with compressed air and a soft brush removed any remaining dust, moisture, and rust.
2. Replacing the main electronic board
The control board (PCB) was too oxidized to be repaired. We installed a genuine Fujitsu part , calibrated to the Halcyon R-410A model, ensuring perfect compatibility with the existing fan motor and compressor.
3. Repairing the power wiring
Some internal connectors weakened by corrosion have been replaced, and we have applied a dielectric coating to prevent future moisture infiltration.
4. Checking the compressor and fan motor
Once the board was replaced, we tested the fan motor and compressor separately. Both responded normally, confirming that the problem was solely with the control circuit.
5. Performance testing and calibration
When restarted, the heat pump quickly reached its set temperature , with stable air flow and optimal cooling efficiency . We finalized the intervention by calibrating the temperature sensor and checking the defrost cycle .
Result: a restored and better protected heat pump
After repair, the system regained its full efficiency . Performance measurements carried out showed:
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A blown air temperature of 11°C in air conditioning mode.
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A standardized humidity level in the electrical box.
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Stable consumption without abnormal current variation.
We also installed a protective shelter above the condenser to extend the life of the new electronic board, particularly useful in exposed urban environments such as those at Verdun .
Our Fujitsu know-how: durability and precision
Fujitsu Halcyon wall-mounted heat pumps are renowned for their reliability, but they require regular maintenance to prevent problems related to moisture and corrosion. At AirGreen, we perform hundreds of Fujitsu repairs each year throughout Greater Montreal, Laval, Longueuil, the North Shore, and the South Shore .
Our interventions are distinguished by:
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Original manufacturer parts systematically used.
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Detailed diagnostics with professional instrumentation.
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Complete transparency on steps and costs.
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A warranty on repairs and replaced components.
Maintenance tips to prevent corrosion
To avoid the recurrence of this type of problem, we recommend to our customers:
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Install a shelter or rain shield over the outdoor condenser.
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Clean the housing once or twice a season to remove dust and deposits.
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Check electrical connections every two years during annual maintenance.
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Avoid direct watering of the condenser when maintaining the grounds.
These simple actions help extend the life of the heat pump and maintain optimal energy efficiency .
AirGreen: HVAC experts serving Verdun and Greater Montreal
Every service call is an opportunity for us to demonstrate our commitment to quality, reliability and customer satisfaction .
Our team serves Montreal, Laval, Longueuil, the North Shore and the South Shore daily, for all needs in:
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Wall-mounted heat pump repair
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Preventive HVAC Maintenance
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Installation of Fujitsu, Midea, Gree, Mitsubishi, Trane, and more systems
By choosing AirGreen, you benefit from a local, fast and guaranteed service, adapted to your residential or commercial needs.
AirGreen – Your trusted HVAC partner in Verdun and throughout Greater Montreal.