If you fire up your system and it runs for a little while and then shuts off, it could be that the safety switch has tripped and you need to check the water supply. Julio Ramirez, a technical advisor with air-conditioning maven Dometic (www.dometic.com), recommends taking the temperatures of the supply and return air with a digital thermometer—it’ll set you back about 20 bucks if you don’t already have one. Check the drain hose. Check that the AC pump is working as it provides cooling water to allow the unit operates without problems. Check for cracked and leaking hoses, broken, worn and corroded clamps, and replace old components. He has completely rebuilt two RVs in which he travels with his family for months at the time. These are put in place to prevent such occurrences as starting the engine without having a signal from the engine room telegraph, trying to start the engine with the turning gear engaged, or trying to start ahead when the telegraph asks for astern. It’s vital to check all connections and hoses. Shut off your marine AC unit and troubleshoot the fan and adjoining areas. You may also trigger the HEAT sensor when operating the AC during warm temperatures. Inspect the thru-hull, strainer basket, and valves. Repairs come backed with a one year warranty covering parts and our labor. But it is an ideal location for critters and debris to accumulate. The Replacement Cruisair Compressor used in F and R series units are also available for Btu Dirty and clogged filters make your AC unit inefficient, increasing the system’s workload. If after going through the troubleshooting, you continue to have problems with your Air Conditioning unit, call King-Air. Marine Air Conditioning Refrigeration and Electrical repair service JDM Marine Co San Diego. (Probably the #1 question we get). The compressor works but the fan doesn’t. When this happens, turn off the pump and the AC unit to allow it to cool. Shut off your marine AC unit and troubleshoot the fan and adjoining areas. In all cases, reading and studying the aforementioned manual before opening your toolbox or calling for help is very important. Comfort Marine Air is a full service Marine HVAC products and services company with years of experience and a genuine commitment to professional, affordable and personalized service. Poor or damaged insulation can reduce cooling. Control Unit, user manuals, operating guides & specifications Replacement Cruisair parts for units - SXR, SXF, STX, STQ. Kinks in the hose, debris, and clogged lines to the seawater pump can restrict the flow of water. Normal temperatures. Allow them to dry thoroughly before reassembling as moist filters attract dust. If the thermostat is poorly positioned, it may sense cold temperature and reduce the unit’s cooling effect. He grew up on the coast where his dad took him boating from a young age. Like your car’s radiator, the evaporator in your boat’s air conditioner can freeze during operation. The control is dual voltage , operating at both 115 and 230 Volts, 50/60 Hz. An improperly located thermostat may also have difficulty gauging the actual cabin temperature, leading to this problem. The thermostat might also act up so make sure it works properly. Reverse cycle uses the same principle as air conditioning, except the refrigerant flows in the opposite direction. In this article, we look at the common issues to check when your vessel’s AC stutters. Activation of High-Pressure Switch in HEAT Mode, 7. But to perform optimally, the pump must always be in contact with the water. (Nice vacation, huh?) A leak can also lead to a frozen evaporator as it reduces the level of coolant. And when in doubt, always call the professionals. If the filter gets dirty, the airflow is restricted and it’ll take longer for the cabin to cool off. Reverse-cycle units can produce heat down to seawater temperatures of 40 degrees F or so, but they work better if the water’s warmer. A professional marine air conditioner technician has requisite experience and up-to-date tools to perform in-depth diagnostic tests, repairs, and maintenance to bring your unit up to speed. Fan Does Not Work While the Compressor Is Running, 10. (If your reverse-cycle valve sticks, by the way, tapping it lightly may free it; listen for a hiss as it activates. Similar to other air conditioning systems, this equipment involves electrical and high pressure components. Look for damage, clog and anything which can obstruct the smooth flow of cooling water. After trying all the troubleshooting tricks in the book and you can’t resolve the issues with your cooling unit, ask for professional help. Most marine air conditioners have a reverse-cycle mode, which changes the flow of refrigerant and turns the system into a heat pump. troubleshooting and maintenance and provide technical support for a wide variety of equipment including: Webasto Blue Heat, Proheat, and Propex Heatsource Marine Forced Air and Hydronic Diesel Heaters Eno, Dickinson, Force10 Manufacturing, Gas Systems, Hillerange, Kenyon, Origo, Malfunctioning solenoids can compromise the AC’s function. Don’t let the dog days of summer make you swelter. It can also be a tripped circuit breaker or blown fuse which will need a replacement. A freezing evaporator can be because the fan is not running efficiently or is damaged. In that case, move the thermostat for correct operation. At the end of this piece, you will know the basics to keep your air conditioner in top shape. Check for disconnections and reconnect or replace any loose or worn cables. Have spare air conditioning strainers onboard as the constant flow reduces the longevity of the baskets. If this is the problem, flush the system for improved airflow. This option might be costly than DIYing your maintenance, but it will save you time, efforts and help you enjoy more quality time on your boat. The point? Check to see that the fan is running properly. But, if there’s not enough time for that for some reason, just look at the controls—many modern systems include digital panels that display error codes. Marine AC Information. They mount in line with the interior panels and conserve space. As the phase-converting refrigerant passes through the evaporator coils, it gets colder but more gaseous (because it’s boiling), and absorbs heat from the surrounding air. After purging the air from the system don’t forget to shut the purging valve. On cooling, the thermostat may be set too cold or supply air may be short cycling causing the evaporator coil to freeze: Check thermostat setting and/or redirect supply air so that it is not directed into the return air … The evaporator/fan/ducting assembly is called an “air handler.” The warm air that’s pulled in from the cabin is called “return” air, while the “supply” air is the cold air coming out of the air handler. To check this, disconnect the pump power and start the AC. If everything fails, flush the unit with a pressure hose or call a professional if you can’t identify the source of the problem. The condenser coils can accumulate scale which restricts cooling water flow. Don’t whale on it too hard, though.). Refrigeration system is one of the most important machinery systems on board ships that requires continuous monitoring and maintenance from ship's engineers. Raise the elevation to restore flow. However, the fan may become noisy to the point of being uncomfortable. How do you make a living on the road? The best way to understand how to care for whatever type of system you’ve got is to take a trip through the system, starting at the expansion valve, located just upstream of the evaporator. The compressor pumps hot, pressurized refrigerant into the air handler where it transfers its heat to the cabin via the flow of cool cabin air over the coils. The first thing you should do if it’s way too hot belowdecks is to clean the filter—vacuum it, wash it, do whatever the owner’s manual tells you. If required, charge the system with fresh refrigerant. The expansion valve regulates passage of high-pressure refrigerant into the evaporator; because it’s under many atmospheres of pressure, the refrigerant is liquid at this point. Our partners and staff come from a wide range of backgrounds, which provides our customers with versatility and stability. Sometimes, the noise is because of friction and some lubrication will stop it. This indicates malfunctioning reversing valves. Search for military aircraft including a diesel engine part for a helicopter or airplane, ship repair supplies and more. You can also experience this problem if the thermostat is set too low. Replace or service the seawater pump if it is failing and change kinked hoses. Depending on the brand and model of air conditioner, the following are things to check when you have issues with your boat AC. The first thing you should do if it’s way too hot belowdecks is to clean the filter—vacuum it, wash it, do whatever the owner’s manual tells you. (PS: We read ALL feedback). Dusty evaporator coils are inefficient and will increase the strain on your unit. The AC pump in your boat is a vital component that must work perfectly to keep your vessel cool. Circuit Breaker Triggers Uncontrollably, 9. Clean the existing duct system or increase the vents for adequate airflow. Phone: 727-492-2622. An overflowing condensation pan can flood your boat if not corrected on time. We hope this article will help keep things cool when it’s blazing hot on deck. There are some serious problems that can cause these issues, but typically, when your AC won't turn on, you have about a 70% chance of solving the issue yourself. Make sure bleed valve is tightly closed. View & download of more than 1 Marine Air Systems PDF user manuals, service manuals, operating guides. A chilled-water system, on the other hand, cools fresh water that, in turn, circulates through the air handlers. When any liquid boils—scientists call this “phase conversion”—it absorbs heat. It can also be because of a short circuit in the compressor and this requires a replacement by a professional. A dirty condenser filter will restrict the flow of water, and this can cause the unit to overflow. 4. The entry of large particles, critters and debris can also make the pump noisy. When your air conditioner’s condensation pan overflows, it means an obstruction. Efficient heat exchange at the evaporator demands a free-flowing supply of hot or warm air from the cabin. Air Marine Systems is a reseller of new and used aviation and marine spare parts. You can change a burned fuse or tripped circuit breaker, but don’t attempt retrofitting your marine AC unit’s electrical connections except you are qualified. The most important maintenance check for your marine AC unit is to ensure the water intake strainer is in excellent form. Test the fan with a jumper to determine if it’s still working. Some Older Cruisair Parts and Marine Air Systems Parts Are still Available Like - Blowers, Circuit boards, displays, and Keypads for older Marine Air Conditioners like Marine Air VCD, VCP, VRP, VHE. Increase the air grilles and remove any obstruction to the ventilation. The thru-hull allows your boat’s AC unit to draw raw water from the sea. Before troubleshooting your marine air conditioner or any other equipment, read and understand the user manual. Check your user manual for the correct way to clean the system or ask a professional to perform detailed maintenance. Here’s how to troubleshoot that air-conditioning system. The electrical box and compressor units take up to 25 percent less space compared to those made by our competitors. If you need to clean the filter more often, try cleaning the cabin. Check to see whether the reversing valve sticking produces a hissing noise when you tap it with a screwdriver during operation. If the system is working properly, you should see condensation on the piping between the air handler and compressor because of the cold refrigerant; dry piping here could mean the system needs recharging. Whenever you experience this problem, check that water is flowing through the AC unit. So one of the easiest and most inexpensive problems to fix on our air conditioning troubleshooting mission is to make sure windows or doors are closed; otherwise you are undermining your air conditioner’s efficiency. Check that there are no loose or disconnected wires. The thermostat should be in off position. Troubleshooting and Consulting. Summer's here, is your boat's air-conditioning system up for the job? Morten is the founder of GoDownsize. From 1977 until today, Marine Air Systems has represented innovation in marine air conditioning. After leaving the evaporator, the refrigerant, now a low-pressure gas, travels to a compressor which once again pumps it up to many times normal atmospheric pressure. Often, a noisy AC unit results from a dirty fan motor. Summary of Contents for Marine Air Systems AH-Passport Page 32 Dometic Environmental Corporation 2000 N. Andrews Ave. Ext. Please contact us for a price quote and estimated turn-around-time. You can flush the system with a weak solution of biodegradable acid or pressurized water. Installation and servicing of this system can be hazardous. Sometimes the problem is from a faulty fan relay or capacitor. If you explore all options but the noise persists, call a professional. Eventually the autumn chill will send you reaching for the heat switch, and when you hit it, you want warm air to flow. Faulty bearings can also make the pump loud. A fan blows warm air from the cabin across the evaporator and discharges it, now cooler, through ducting back into the cabin. Check the drain by blocking it temporarily and filling the pan with fresh water—it should be gone in 30 seconds or less when you unblock the drain. The first company to develop a self contained ductable marine air conditioner in the 1980’s, Marine Air Systems revolutionized the marine air conditioning business by making marine air conditioning more affordable for boat builders to install. The AC will shut off if it doesn’t get water flow to prevent overheating. But here’s the good news—if your system conks out, getting it going again will often be pretty simple. The wire on the reversing valve solenoid might be loose or worn. We specialize in repair and installation of marine air conditioning, refrigeration and icemakers. If the difference is less, the problem could be a loss of refrigerant charge; although the system is supposed to be a closed loop, sometimes refrigerant leaks out. But this may prove difficult based on the model and your experience. Pressure equals heat, so to cool the gas on the downstream side of the compressor it’s run through a raw-water-cooled condenser, which returns the refrigerant to a liquid state. A new clean system under moderate load should operate at the lower end of this range and a dirty system under full load might operate in the upper range. As with virtually every other maintenance project onboard, step one of just about any fix will entail finding and reading the owner’s manual: Everything you can do yourself is explained in there; for everything else, call a pro and join mom and the kids at the hotel pool. Inspect the reversing valve relay to see if it’s burned. Clean your air conditioner’s filters monthly by washing with plain water, vacuuming or blowing. Checking and recharging the system is a job for a licensed air-conditioning technician. Part of your scheduled air-conditioner maintenance, along with cleaning the air filters and raw-water strainer, should be to switch to reverse cycle for a couple of minutes periodically, even if it’s already hot as Hades in the cabin. Email JDMMarineco@Gmail.com. This Dometic split-system-type air conditioner separates air handler/evaporator (left) and condenser/compressor (right). Or it could be the condenser coil. It makes the evaporator dusty and decreases its heat-dissipating abilities. Contact a technician if none of the above works. These problems usually require replacing the faulty component. If the fan has accumulated dirt and debris, has damaged bearings or worn belts, it will be loud. The air start system looks rather complicated, but it is quite simple when you examine it without the safeguards. Use these tips to keep your AC unit in excellent shape. If the AC pump is missing fins, has melted components, or worn bearings, replace it. We may earn a commission when you buy through our links. Valve bypass lever should automatically move to open position We would love to hear your thoughts! Many skippers never switch to reverse cycle, but they should: There’s a reversing valve in the system that can stick if it’s not activated regularly. Either the vents are insufficient or the existing ones are blocked. Clean with a blower if you notice debris or dust buildup. The tubing can be run inside of the interior walls or along the ceiling. “There should be anywhere from 12 to 20 degrees difference between them,” he adds. This issue occurs when the high-pressure switch, i.e., RESET activates while the air conditioner is operating in HEAT mode. Most systems have a safety switch that shuts off the compressor if the water flow is insufficient, which causes system pressure to increase beyond a preset limit. Turn off the power and check for loose electrical connections in the electrical box. • Air handler coil may be air locked – bleed if necessary. Nothing beats a summer retreat on your boat. Clear the hose if it’s an obstruction. “A self-contained marine air conditioner,” he adds, “has a life expectancy of about 15-20 years, depending on how much it is used, with many older units still cooling effectively since the 1980s.”. It’s July, and a skipper’s thoughts turn to his air-conditioning system—especially if the darn thing stops working and his family moves into the Holiday Inn next door to the marina. Thankfully, you can troubleshoot your boat’s AC unit on the water so you don’t have to swelter in the heat while others are having a blast. Turn-around-time may vary depending on current in-house workload. It might be blocked, kinked or misaligned. Manufacturers recommend flushing the condenser coils to remove marine scum and scale every two to five years based on the frequency of use or location. While you’re looking for the manual, by the way, here are a few things that may come in handy at some point in the near future. © 2021 Cruz Bay Publishing Inc., an Active Interest Media company. All Rights Reserved. Temperature problems . If your marine AC is not cooling like before, maybe the refrigerant is leaking. This problem occurs when the high-pressure switch is triggered while the AC unit is operating in Cool mode. To jump the fan, isolate the RED and GREEN wires in the thermostat connection. Check your boat for any spaces that can allow warm air into the cabin. The problem might be from a shorted wire. What happens if you turn on your AC but it doesn’t come online? Air conditioners don’t really produce cold, they remove heat. Need a way to check whether your air-conditioning system is working up to spec? ... Industry, We have the education , experience and the Factory Certified Licensing to be the best for all your HVAC-R systems needs. Make sure the sea cock is open and prime the pump to activate. If your air conditioner won't turn on, it's important to troubleshoot a few key things before you call in an HVAC technician, as this can save you time and - more importantly - money. When this occurs, the evaporator will not dissipate heat effectively. Investing in a boat air conditioner can be a tough job particularly if it is your first time to shop for one or if you are not armed with sufficient information on what essential features to look for. Make sure the pan is not corroded as this can lead to flooding and will need a repair or replacement. The proper position of the thermostat is the evaporator discharge. Always disconnect power supply prior to perform installation, servicing or maintenance. You may notice that your boat’s AC is not as cool as it used to be despite the compressor and fan working normally. Clean the relevant sea strainer once a month (or more often in tropical waters), and whenever your air-conditioning system is functioning, keep an eye on its raw-water discharge to ensure the flow is unrestricted. The manual explains the things you can check in the system and the correct procedure. Put the system’s fan or blower on high speed before testing, Ramirez says. The fix is to flush out the cooling system with a weak acid solution, a job for a technician in most cases. If you are having trouble with your Marine A/C system, try the following troubleshooting tips. Because the water flow passing through the strainer is nutrient-rich, critters and small marine life love to lodge in the space. Replace the pump if it doesn’t trip off the circuit. Remove accumulated growth and move the valves frequently, especially if the boat will be out of the water for extended periods. Email: brad@bradsmarineac.com Marine Air began building air conditioning systems for boats in 1977. MARINE AIR SYSTEMS Marine Air Systems (MAS) is a product of Taylor Made Environmental, Inc (TME). The refrigerant then flows through the expansion valve to the condenser, where the now very cold refrigerant picks up heat from the seawater and carries it through the compressor to the cabin. Inspect the air filter and clean it for proper ventilation. The AC unit may not be elevated enough for the water to leave the pan nipple. TME is a recognized leader in the design and manufacture of high-performance comfort control systems, refrigeration products and battery charging products for demanding environments, including commercial and recreational marine craft, vehicles and Over time, excessive amounts of materials in the sea strainer that acts as a barrier between the water and the thru-hull can cause a blockage. The condensate pan is the tray that collects the humidity the AC unit draws from your boat. Most air-conditioning systems are “direct expansion”: they pump refrigerant directly to air handlers in the boat’s living spaces. That said, it only proves to say how valuable it is to conduct a research first before going to the store. The colder the water, the more efficient the cooling, but most air conditioners will work fine to water temps into the 80-degree range, sometimes warmer. If your AC unit’s circuit breaker will not stay on, it may be because of: Check that the circuit breaker is not broken. If the pump makes a lot of noise, it has something in it. Even if your air-conditioning system is working great, clean the filter once a month. Clear brush and debris from outside unit and surrounding area Acquired by Dometic from Taylor Made Corporation in 2003, Marine Air is an important part of the Dometic brand portfolio. Our marine air conditioning systems are designed to be as compact as possible. Your AC unit’s fan keeps the evaporator coil cool for efficient operation of the condenser. If you explore all options but the noise persists, call a professional. Make sure the condenser coil’s caps are removed and the water strainer and pump are below water level. For this, you need a professional to find and seal the leak and refill the Freon. In most installations the pan drains into the bilge, but if the drain gets clogged and the pan overflows the water will go somewhere you don’t want it to. But an ailing marine air conditioning system can spoil the fun and force you to a nearby hotel. So, although the technology is fine for autumn boating, if you plan on an Arctic exploration, you might want to install a dedicated heating system. A leaking hose is not only bad for your AC unit, but it can flood your boat and even sink it if you are running the system while the boat is empty. Marine HVAC Controls - Dometic, CruisAir, Marine Air, Passport Repair Service. Air Marine Systems, Inc 2701 Sonic Drive Virginia Beach, VA 23461 757-468-9400 voice 757-468-9666 fax sales@airmarsys.com: But the unit can stop working without notice. Check the minimum number of vents the system requires for optimal performance and upgrade as required. Learn about eight most common problems that are seen in ship's refrigerated system. A gurgling sound indicates air in the system. Inspect the raw water strainer and flush if dirty or clogged. If you turn on your boat AC unit but can’t feel or hear anything, it could be from different factors but all of them are related to your electrical circuitry. We service Fort Lauderdale, FL, Vero Beach, FL, Tampa, FL, Marco Islands, FL and Key … There are also safety systems incorporated such as a bursting disk and numero… If you need to clean the filter more often, try cleaning the cabin. Focused initially on self-contained systems that are ideal for small to mid-sized boats, Marine Air climate systems provided customers with a “large boat” feeling of comfort and luxury. The problem might be from a loose or broken wiring. The main cause of this issue is restricted airflow and can be corrected by removing the obstruction. It also lists the activities which are not DIYable and so you can call professionals. In this case, “boiling” doesn’t mean “hot”: The boiling point of a common refrigerant, R410A, is around minus 55 degrees F. At normal temperatures and pressures, it’s a gas. Air-conditioning systems come in different configurations, but all share three major components: The evaporator, where boiling refrigerant absorbs heat from the surrounding air; the compressor, which pushes the refrigerant through the system; and the condenser, where the refrigerant is cooled and liquefied before being pumped back to the evaporator. Unit and troubleshoot the fan is running properly happy to help disconnections and reconnect or replace any or... Temperature, leading to this problem if the above works become noisy to the seawater if. Will restrict the flow of water a replacement vessel ’ s vital to check whether air-conditioning... Can compromise the AC unit and troubleshoot the fan is running, 10 during the summer news—if your conks. 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