Remedial Works

Solar thermal systems use the sun’s energy to heat water or air for domestic or commercial use. Over time, issues like blocked pipes, faulty sensors, or degraded components may require remedial attention.

Common Issues and Remedial Actions:

• Low Hot Water Output:
  • Check the Solar Collector Panels: Clean the panels to remove dirt, debris, or leaves that may block sunlight.
  • Inspect the Heat Transfer Fluid: Ensure the heat transfer fluid (usually a mixture of water and antifreeze) is topped up or replaced if degraded.
  • Check the Pump: If the circulation pump is not working, it can affect the flow of the fluid, reducing heat transfer. Replace or repair the pump if necessary.
  • Thermal Store/Hot Water Cylinder Issues: Inspect the tank for leaks or sediment buildup, which may require flushing or replacing parts.
• Frozen Pipes or Antifreeze Loss:
  • Inspect Pipes and Insulation: Ensure pipes are insulated properly to prevent freezing during cold weather.
  • Replace Antifreeze: If the antifreeze level is low or the fluid has degraded, replace it with a new solution.
• Sensor and Controller Failures:
  • Test Sensors and Control Units: Malfunctioning temperature sensors or controllers can prevent the system from operating correctly. Recalibrate or replace faulty components.

Solar PV systems convert sunlight into electricity, and while they are relatively low-maintenance, problems such as panel degradation, wiring issues, or inverter faults can occur.

Common Issues and Remedial Actions:

• Decreased Energy Production:
  • Clean the Panels: Dust, dirt, or bird droppings can accumulate on solar panels, reducing their efficiency. Regular cleaning of panels with appropriate tools can restore efficiency.
  • Check for Panel Damage: Inspect the panels for cracks, chips, or discoloration. Damaged panels may need to be repaired or replaced.
• Inverter Faults:
  • Inspect Inverter Display or Error Codes: Inverters typically display error codes when something is wrong. Troubleshoot these errors or reset the inverter as per the manufacturer's instructions. If problems persist, the inverter may need to be replaced.
• Wiring and Connection Problems:
  • Inspect Wiring: Ensure all connections between the panels, inverter, and battery storage (if applicable) are secure. Look for signs of wear or corrosion that might cause power loss.
  • Replace Damaged Cables or Junction Boxes: If wiring is faulty or connections are exposed, repair or replace them to avoid short circuits or inefficiency.

Battery storage systems are essential for storing excess energy generated by solar PV systems for later use. Over time, battery performance can degrade due to age, overcharging, or other operational issues.

Common Issues and Remedial Actions:

• Battery Not Holding Charge:
  • Test Battery Voltage: If the battery is no longer holding charge, it could be a sign that the battery cells are degraded. Testing and diagnosing voltage levels will help determine if the battery needs to be replaced.
  • Check Charge Controller Settings: Verify that the charge controller is set correctly to prevent overcharging or deep discharging, which can damage the battery.
• Battery Inverter Faults:
  • Inspect Battery Inverter: If there is an issue with the battery inverter (the device that converts DC power to AC power), troubleshoot the fault codes or perform a reset. If issues persist, it may need to be repaired or replaced.
• Overheating:
  • Monitor Battery Temperature: If the battery is overheating, it can significantly reduce its lifespan. Check ventilation and cooling systems to ensure they are functioning properly.
• Corrosion or Leaks:
  • Inspect for Corrosion: Check the terminals and connections for corrosion. Clean the terminals with a non-abrasive cloth or apply a corrosion inhibitor if necessary.

Air Source Heat Pumps provide heating and cooling by transferring heat from the outside air. Common issues with ASHPs include reduced heating output, faulty compressors, or refrigerant leaks.

Common Issues and Remedial Actions:

• Reduced Heating Output:
  • Check Refrigerant Levels: Low refrigerant can lead to inefficient heating. A professional should check and top up or replace refrigerant if necessary.
  • Clean Coils and Filters: Dirty evaporator and condenser coils or clogged filters can reduce heat exchange efficiency. Cleaning or replacing the filters and coils can restore proper function.
  • Inspect the Outdoor Unit: Ensure that there are no obstructions (e.g., leaves, snow, or dirt) blocking airflow to the outdoor unit.
• Compressor or Fan Failures:
  • Inspect the Compressor: If the compressor is malfunctioning, it may not be able to heat or cool efficiently. Professional inspection and replacement may be required.
  • Test Fan Operation: Ensure that both the indoor and outdoor fans are working properly. If a fan is not turning or making unusual noises, it may need servicing.
• System Leaks or Pressure Issues:
  • Inspect for Leaks: Check refrigerant lines for leaks, as this can cause a loss of heating or cooling capacity.
  • Test System Pressure: A drop in system pressure may indicate a refrigerant leak or other mechanical issues that require professional attention.
• Defrost Cycle Malfunctions:
  • Test Defrost Cycle: If the system isn't entering defrost mode during cold weather, ice buildup can occur on the outdoor unit, reducing efficiency. Check for control board issues or sensor malfunctions and repair as needed.