Samsung EHS Clicking Sound: Diagnosis & Fix (UK) -... | heatpumpfaults.co.uk

Symptoms:

The Samsung EHS heat pump is emitting a distinct clicking sound every 10 seconds. This occurs predominantly during heat demand cycles. No visible error codes displayed on the unit's controller. Sound appears to originate from the outdoor unit, potentially near the compressor. No app-side telemetry drops or connectivity issues detected.

Solution:

1

Isolate the power supply to the Samsung EHS unit before commencing any work. Confirm isolation with a multimeter.
2

Inspect the outdoor unit for any signs of ice build-up. Manually defrost if necessary and optimise defrost cycle settings.
3

Check the compressor relay for signs of damage or corrosion. Replace if faulty.
4

Use a refrigerant manifold gauge to check the system's refrigerant pressure. Adjust refrigerant levels to manufacturer specifications (F-Gas regulations apply).
5

Inspect the reversing valve for proper operation. A qualified F-Gas engineer is required for internal component inspection.
6

Check all pipework connections for tightness and ensure proper support to minimise vibration. Use anti-vibration mounts where necessary.
7

If the clicking persists, consult a Samsung EHS certified engineer for further diagnostic testing, including PCB analysis.

Technical Recommendation:

Access the Samsung EHS diagnostic mode (refer to the service manual for the button sequence) to view real-time system parameters, error history, and component status. This can provide valuable insights into the cause of the clicking sound.

Why This Happens:

Compressor relay chatter: A faulty relay switching the compressor on and off rapidly.
Reversing valve issue: The reversing valve may be sticking or malfunctioning, causing a clicking sound as it attempts to switch.
Ice build-up: Excessive ice formation on the outdoor unit's coils impacting fan or compressor operation.
PCB fault: A malfunctioning Printed Circuit Board (PCB) sending incorrect signals to components.
Pipework vibration: Loose or improperly supported pipework causing vibration and clicking during compressor operation.
Refrigerant overcharge/undercharge: Incorrect refrigerant level leading to abnormal compressor behaviour.

Technical Background:

The Samsung EHS ASHP uses a vapor-compression refrigeration cycle with R32 refrigerant. Flow rate is controlled by a modulating circulation pump. Weather compensation logic adjusts flow temperature based on external temperature sensors. The clicking sound may indicate a mechanical issue within the compressor, reversing valve or associated components. Defrost cycles are triggered based on coil temperature and humidity levels, especially prevalent during UK winter conditions.

Safety Warning:

Working with heat pump systems involves potential electrical hazards (230V/400V AC). Ensure the system is isolated before any electrical work. Refrigerant handling requires F-Gas certification; do not attempt DIY repairs on the refrigerant circuit. Improper handling can result in environmental damage and legal penalties. Be aware of G3 unvented hot water safety (Tundish) regulations.

Preventative Care:

Schedule annual MCS-certified servicing to check refrigerant levels, compressor performance, and component integrity
Regularly inspect pipework supports and vibration dampeners
Ensure proper drainage around the outdoor unit to prevent ice build-up
Clean the outdoor unit coils of debris regularly
Check inhibitor levels in the system annually to prevent corrosion

Frequently Asked Questions

•What is the typical lifespan of a Samsung EHS compressor?

The typical lifespan of a Samsung EHS compressor is between 10-15 years, provided it's regularly serviced and operated within the manufacturer's specifications.

•How can I prevent ice build-up on my Samsung EHS unit during winter?

Ensure proper drainage around the unit, optimise defrost cycle settings, and consider installing a base heater to prevent ice accumulation.

•What are the F-Gas regulations I need to be aware of when owning a Samsung EHS heat pump?

F-Gas regulations prohibit unqualified individuals from handling refrigerants. Any work on the refrigerant circuit must be performed by a certified F-Gas engineer to prevent environmental damage and legal penalties.

Symptoms:

Solution:

Technical Recommendation:

Why This Happens:

Technical Background:

Safety Warning:

Preventative Care:

Frequently Asked Questions

Frequently Asked Questions

•What is the typical lifespan of a Samsung EHS compressor?

•How can I prevent ice build-up on my Samsung EHS unit during winter?

•What are the F-Gas regulations I need to be aware of when owning a Samsung EHS heat pump?

Related Questions

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