Yacht AC refrigerants and EU F-gas rules in Spain

A yacht's air-conditioning or refrigeration circuit must be treated according to the refrigerant and equipment specified for that particular unit. A refrigerant used in one current product cannot be assumed suitable for another system, even if both units perform a similar job.

This guide explains how to identify the refrigerant, when EU leak-check obligations may apply, what must happen after a leak and which work requires a certified person. It also sets out the information crew should collect before arranging service in Mallorca.

Identify the refrigerant before planning work

Start with the equipment data plate. Photograph it clearly and record the manufacturer, model and stated refrigerant before ordering parts, discussing a conversion or arranging refrigerant work.

Manufacturer information shows why assumptions are unsafe. The Webasto FCF manual specifies R410A, and Frigomar publishes R410A charges for named models in its 410-series chiller range. By contrast, the current Dometic Cold Machine VX400F refrigeration product uses R1234yf and gives its GWP as 0.5. Dometic also states that its newer GVTX self-contained marine AC uses R-454B.

These examples do not create a general replacement rule. They show that refrigerant selection remains tied to the actual approved equipment. Information about Dometic marine equipment or Frigomar marine equipment should therefore be checked against the yacht's installed model and its data plate.

A Webasto FCF also illustrates why the service method matters. Its manual says the unit is manufactured without service ports. Refrigerant diagnosis or charging must follow the precise unit design and a qualified service procedure, rather than assuming gauges can simply be connected.

What the EU and Spanish rules require

Regulation (EU) 2024/573 requires operators to take necessary precautions to prevent unintended releases of fluorinated greenhouse gases. It also requires technically and economically feasible measures to minimise leakage.

The regulation specifically identifies vibration-related leakage risk in transport equipment. It also addresses shipboard refrigeration and air-conditioning as a sector where unnecessary emissions during servicing should be prevented. That makes correct identification, controlled refrigerant handling and clear service records directly relevant aboard a yacht.

Article 10 requires certification for natural persons carrying out specified activities on the listed F-gas equipment. These activities include:

• Installation: Work that falls within the regulation's installation category requires a certified person.
• Maintenance or servicing: Refrigerant-related service is included within the certification requirement.
• Repair and decommissioning: Opening or taking the relevant equipment out of service is covered.
• Leak checks and recovery: These are not suitable tasks for unqualified crew.

In Spain, Real Decreto 115/2017 sets out the competence certificate for handling refrigeration systems containing any F-gas refrigerant charge. The certificate scope covers installation, maintenance, charging, refrigerant recovery, leak checks and dismantling.

Crew should not connect gauges, add refrigerant or recover it. If there is uncertainty about the certificate or record requirements for a particular installation, obtain system-specific advice or request compliance and flag-state support.

Leak-check thresholds and the repair sequence

The baseline threshold under Article 5 is equipment containing 5 tonnes CO2 equivalent or more of Annex I F-gases, subject to the exceptions stated in Regulation (EU) 2024/573. The threshold is not a statement that every yacht air-conditioning system needs a fixed annual leak check.

Applicability must be established for the particular system. Record the unit, refrigerant and equipment information, then have the Article 5 position confirmed where it is unclear. Do not infer the answer solely from the physical size of the yacht or from another unit installed aboard.

If an F-gas leak is detected, the regulation requires repair without undue delay. Where the equipment is subject to Article 5 leak checks, the sequence after repair is specific:

1. Have the leak repaired by an appropriately certified person.
2. Operate the equipment for at least 24 operating hours before the follow-up check.
3. Arrange the certified follow-up check no later than one month after the repair.
4. Retain the repair findings, contractor certificate details and refrigerant-related service record.

The follow-up check is part of the repair process where Article 5 applies. It should be scheduled when the repair is documented, rather than left as an unassigned note in the vessel's defect list.

What crew can check safely

Crew can collect useful evidence without disturbing the refrigerant circuit. The aim is to give the engineer an accurate equipment identity, fault history and service record while leaving regulated work to a certified person.

• Photograph the data plate: Capture the manufacturer, model and stated refrigerant clearly. Use this information before ordering parts or arranging attendance.
• Log the symptoms: Record alarms, cooling performance, oil staining and the date and time of the suspected leak. Do not connect gauges or add refrigerant.
• Track repeated protection events: Note repeated pressure protection messages, particularly when seawater and airflow checks are normal. Preserve the controller message rather than reducing it to a general report that the AC stopped.
• Check the repair plan: After a documented repair, confirm that the certified follow-up check has been scheduled where Article 5 applies.
• Maintain exact records: Keep details of refrigerant work, the contractor's certificate and the leak-repair findings with the equipment service record.

These checks help separate information gathering from refrigerant handling. They also allow the attending technician to identify whether the visit concerns diagnosis, leak testing, recovery, repair or the regulated follow-up check.

When to call an engineer

Stop at observation and arrange qualified attendance when the work may involve the refrigerant circuit. The relevant triggers are specific:

• Suspected refrigerant loss or oil staining: Record the evidence, but do not attempt to confirm the fault by connecting gauges.
• A low-pressure alarm: Log the controller message and operating circumstances, then arrange diagnosis.
• Repeated pressure protection: Call when the controller repeatedly reports protection after seawater and airflow checks are normal.
• Any need to open the circuit: Charging, recovery and refrigerant leak testing require the correct service procedure and certification.
• Replacement or conversion planning: Confirm the equipment approval rather than treating a lower-GWP refrigerant as a universal top-up or substitute.
• Unclear Article 5 status: Ask for confirmation of the threshold, records and certification requirements for the particular system.

A refrigerant conversion should be treated as an equipment-specific decision. The fact that current products use R1234yf or R-454B does not establish that either refrigerant can be installed in older yacht AC equipment.

Build a usable refrigerant service record

Keep one record for each installed unit rather than a single general note for the yacht's AC plant. At minimum, the working file should identify the equipment and stated refrigerant, document alarms and suspected leakage, and retain contractor certificate details and repair findings.

Where Article 5 applies, the file should also show that the certified post-repair check was planned after at least 24 operating hours and completed no later than one month after repair. This gives the captain a clear chain from detection and repair to the required follow-up check.

Blueward Marine provides yacht air-conditioning and refrigeration service from Palma de Mallorca. Use the online service booking to describe the fault and upload data-plate photographs, or call the 24/7 emergency line on +34 971 251 374.