Common faults and troubleshooting measures of air source heat pumps

As people focus more on the environment, they prefer air source heat pumps. These pumps save energy and protect the environment. They work well for modern heating and cooling needs. However, users may face faults during daily use. These issues can reduce performance and user satisfaction. This article explains common faults and offers troubleshooting tips.

Common Faults and Cause Analysis

Frequent Start and Stop of the Unit

Phenomenon Description:
The heat pump frequently starts and stops. This reduces efficiency and shortens equipment life.

Possible Causes and Solutions:

• Irrational Temperature Setting:
  Users set target temperatures that don't match room needs. This causes frequent adjustments.
  Solution: Set the target temperature based on actual room needs. Avoid extreme adjustments.
• Poor Room Insulation Performance:
  Fast heat loss forces the heat pump to work frequently.
  Solution: Improve insulation by adding wall insulation and sealing doors and windows.
• Small Circulating Water Capacity:
  Heat pump capacity exceeds room demand, causing unstable operation.
  Solution: Add a buffer tank or increase water capacity to balance supply and demand.
• Sensor Failure:
  Faulty temperature or pressure sensors mislead the system.
  Solution: Regularly inspect sensors and replace defective parts as needed. 

The Unit Often Stops for No Reason

Phenomenon Description:
The heat pump stops suddenly or cannot restart quickly.

Cause Analysis:

• Power Supply Problem:
  Unstable voltage or power outages cause shutdowns.
• Overload Protection Trigger:
  High loads activate the protection mechanism to prevent damage.
• Insufficient Refrigerant:
  Leaks or delayed replenishment reduce operating pressure.
• Unfavorable External Environment:
  Extreme temperatures exceed the equipment's design range.

Coping Methods:

• Check the power cord, socket, and stabilizer regularly. Ensure a stable power supply.
• Monitor system pressure during high loads and adjust usage. Add auxiliary equipment if needed.
• Inspect refrigerant levels and repair any leaks promptly.

The Unit Has Noise or Vibration

Phenomenon Description:
The heat pump produces noise or vibration, affecting user experience and equipment life.

Possible Causes and Solutions:

• Uneven Installation or Loose Fixation:
  Improper installation causes equipment to vibrate.
  Solution: Reposition the equipment and add shock-absorbing accessories for stability.
• Loose Fan or Compressor Parts:
  Loose screws or damaged parts generate noise.
  Solution: Inspect the fan and compressor. Tighten screws or replace damaged parts.
• Improper Pipe Connection:
  Loose pipes or foreign objects cause resonance.
  Solution: Secure pipe connections and remove foreign objects to ensure smooth operation.
• Severe Bearing Wear:
  Worn mechanical parts cause abnormal noise.
  Solution: Replace worn bearings to maintain proper equipment operation.

The Heating Effect of the Unit Is Poor

Phenomenon Description:
The indoor temperature stays low, reducing user comfort.

Cause Analysis:

• Evaporator Frosting:
  Thick frost reduces heat exchange efficiency.
• Insufficient Insulation Performance:
  Poor pipe or room insulation causes heat loss.
• Circulation System Problems:
  Blocked heat exchangers or low water flow reduce heat transfer.

How to Improve:

• Clean the evaporator frost layer regularly to maintain efficiency.
• Insulate exposed water pipes to prevent heat loss.
• Inspect the heat exchanger and water pump. Remove blockages or upgrade to a larger flow pump if needed.

  Fault Summary Table
  
  

  Fault Phenomenon	Main Causes	Suggested Solutions
  Frequent Start and Stop	Unreasonable temperature settings; poor insulation performance	Set temperatures appropriately; improve insulation performance
  Sudden Shutdown	Power issues; insufficient refrigerant	Inspect the power supply; refill refrigerant
  Noise or Vibration	Loose parts; improper installation	Tighten parts; reinstall components properly
  Poor Heating Performance	Frosted evaporator; poor system insulation	Clean the evaporator; insulate water pipes

   

  Warm Tips

  Daily maintenance keeps air source heat pumps efficient. This article lists common faults and solutions. Users can reduce faults and boost efficiency by following these tips. Contact professional technicians if faults are complex or unresolved. This ensures stable and efficient operation.