Have spare air conditioning strainers onboard as the constant flow reduces the longevity of the baskets. Phone: 727-492-2622. Behind the return-air grille, there’s a filter to screen out dust and other junk. Either the vents are insufficient or the existing ones are blocked. The point? It can also be because of insufficient or blocked supply air grilles. Replace or service the seawater pump if it is failing and change kinked hoses. Eventually the autumn chill will send you reaching for the heat switch, and when you hit it, you want warm air to flow. Check to see that the fan is running properly. Clean with a blower if you notice debris or dust buildup. “There should be anywhere from 12 to 20 degrees difference between them,” he adds. Malfunctioning solenoids can compromise the AC’s function. Check the drain hose. Raise the elevation to restore flow. He has filmed and interviewed people living in tiny houses and RVs since 2011. If your marine AC is not cooling like before, maybe the refrigerant is leaking. Contact a technician if none of the above works. An improperly located thermostat may also have difficulty gauging the actual cabin temperature, leading to this problem. When any liquid boils—scientists call this “phase conversion”—it absorbs heat. 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. 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. Most marine FWC thermostats open at 160°F and will be fully open at approximately 180°F. Dusty evaporator coils are inefficient and will increase the strain on your unit. Your AC unit’s fan keeps the evaporator coil cool for efficient operation of the condenser. When this occurs, the evaporator will not dissipate heat effectively. Look for damage, clog and anything which can obstruct the smooth flow of cooling water. However, the fan may become noisy to the point of being uncomfortable. Check for cracked and leaking hoses, broken, worn and corroded clamps, and replace old components. This problem arises when the air conditioner does not produce heat in HEAT mode. The AC will shut off if it doesn’t get water flow to prevent overheating. Please contact us for a price quote and estimated turn-around-time. A chilled-water system, on the other hand, cools fresh water that, in turn, circulates through the air handlers. We covered this at length in the troubleshooting section. You can flush the system with a weak solution of biodegradable acid or pressurized water. Test the fan with a jumper to determine if it’s still working. Air Marine Systems is a reseller of new and used aviation and marine spare parts. Most marine air conditioners have a reverse-cycle mode, which changes the flow of refrigerant and turns the system into a heat pump. Check that the AC pump works properly and replace if faulty. While you’re cleaning that filter, incidentally, check the condensate pan under the evaporator for water. Inspect the hoses from the sea stock, strainer, pump, to the thru-hull. Reordering the connection might solve the problem. A leak can also lead to a frozen evaporator as it reduces the level of coolant. When this happens, turn off the pump and the AC unit to allow it to cool. Check your boat for any spaces that can allow warm air into the cabin. 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. Whether you’re looking for expert repair and maintenance, retrofit an existing system, or planning to have a new air conditioning system installed, Oceanworks Marine has you covered. Remove any blockage and clean the air filter to improve ventilation. If everything fails, flush the unit with a pressure hose or call a professional if you can’t identify the source of the problem. Depending on the brand and model of air conditioner, the following are things to check when you have issues with your boat AC. Use these tips to keep your AC unit in excellent shape. Allow them to dry thoroughly before reassembling as moist filters attract dust. 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. An internally short pump can also cause the problem. Efficient heat exchange at the condenser demands a free flow of raw water, of course, which means keeping the supply side clear. Similar to other air conditioning systems, this equipment involves electrical and high pressure components. But you won’t get the best service from your climate control system without adequate maintenance. Kinks in the hose, debris, and clogged lines to the seawater pump can restrict the flow of water. Check the condenser filter. This problem is usually the result of insufficient ventilation. Efficient heat exchange at the evaporator demands a free-flowing supply of hot or warm air from the cabin. We may earn a commission when you buy through our links. Normal temperatures. It also lists the activities which are not DIYable and so you can call professionals. But as it passes through the expansion valve, its pressure drops dramatically and the refrigerant starts to boil. Call us about your marine air conditioning needs and we will be happy to help! Inspect the air filter and clean it for proper ventilation. 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. How do you make a living on the road? The wire on the reversing valve solenoid might be loose or worn. Remove accumulated growth and move the valves frequently, especially if the boat will be out of the water for extended periods. 4. An efficient air filter reduces the dirt and dust collecting on the evaporator coils but you need to clean it after some time. Turn off the power and check for loose electrical connections in the electrical box. The control is dual voltage , operating at both 115 and 230 Volts, 50/60 Hz. We have been serving Sarasota, Manatee & Pinellas Counties for over 20 years. If this is the problem, flush the system for improved airflow. Clogged air conditioning condenser coils can make your boat unbearably hot. The Passport I/O Environmental Control is a microprocessor-based controller, designed for the precise monitoring of direct expansion and chilled water air conditioning systems in marine environments. The entry of large particles, critters and debris can also make the pump noisy. 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. 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. After trying all the troubleshooting tricks in the book and you can’t resolve the issues with your cooling unit, ask for professional help. Here, your boat’s AC unit works normally, but it’s not discharging any water. Sometimes, the noise is because of friction and some lubrication will stop it. Increase the thermostat setting to remove ice from the system. Need a way to check whether your air-conditioning system is working up to spec? A fan blows warm air from the cabin across the evaporator and discharges it, now cooler, through ducting back into the cabin. These problems usually require replacing the faulty component. View & download of more than 1 Marine Air Systems PDF user manuals, service manuals, operating guides. This occurs when you are using the thermostat. The Replacement Cruisair Compressor used in F and R series units are also available for Btu If you are having trouble with your Marine A/C system, try the following troubleshooting tips. That said, it only proves to say how valuable it is to conduct a research first before going to the store. 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 Clear brush and debris from outside unit and surrounding area A boat’s AC is a vital system for an enjoyable boating experience during the summer. 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. You may notice that your boat’s AC is not as cool as it used to be despite the compressor and fan working normally. Marine Air began building air conditioning systems for boats in 1977. 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. Nothing beats a summer retreat on your boat. Often, a noisy AC unit results from a dirty fan motor. Refrigeration system is one of the most important machinery systems on board ships that requires continuous monitoring and maintenance from ship's engineers. Troubleshooting and Consulting. The filters ensure your air conditioner exchanges heat efficiently. Clean your air conditioner’s filters monthly by washing with plain water, vacuuming or blowing. Read more about Morten here. Reverse cycle uses the same principle as air conditioning, except the refrigerant flows in the opposite direction. And when in doubt, always call the professionals. The manual explains the things you can check in the system and the correct procedure. Because the water flow passing through the strainer is nutrient-rich, critters and small marine life love to lodge in the space. 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. An award-winning Dometic self-contained turbo unit. You can clean the filter but extensive clogging will need a replacement. A/C Installations; Direct Expansion A/C; DIY Marine AC Install Help; Marine A/C Pumps & Pump Relays; DIY Question about Marine A/C Wattage Draw & DC Inverter Power; Marine AC Control Identification for Marine Air Direct Expansion Units; Cruisair. Or it could be the condenser coil. All Rights Reserved. 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. Checking and recharging the system is a job for a licensed air-conditioning technician. Then the refrigerant returns to the expansion valve and the cycle begins again. Marine HVAC Controls - Dometic, CruisAir, Marine Air, Passport Repair Service. 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. The tubing can be run inside of the interior walls or along the ceiling. Make sure the pan is not corroded as this can lead to flooding and will need a repair or replacement. We hope this article will help keep things cool when it’s blazing hot on deck. The condenser coils can accumulate scale which restricts cooling water flow. • Air handler coil may be air locked – bleed if necessary. Air Marine Systems, Inc 2701 Sonic Drive Virginia Beach, VA 23461 757-468-9400 voice 757-468-9666 fax [email protected]: Like your car’s radiator, the evaporator in your boat’s air conditioner can freeze during operation. This problem occurs when the high-pressure switch is triggered while the AC unit is operating in Cool mode. After purging the air from the system don’t forget to shut the purging valve. The thru-hull allows your boat’s AC unit to draw raw water from the sea. 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 the fan has accumulated dirt and debris, has damaged bearings or worn belts, it will be loud. Make sure the sea cock is open and prime the pump to activate. From 1977 until today, Marine Air Systems has represented innovation in marine air conditioning. This makes it imperative to know basic things to troubleshoot when your marine cooling system fails suddenly. The thermostat might also act up so make sure it works properly. At the end of this piece, you will know the basics to keep your air conditioner in top shape. 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. 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. Turn off all the power from the boat before attempting to troubleshoot electrical components. A gurgling sound indicates air in the system. To check this, disconnect the pump power and start the AC. (Probably the #1 question we get). The thermostat should be in off position. 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. The problem might be from a loose or broken wiring. 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. The pump needs to be submerged to draw water into the AC unit. Check to see whether the reversing valve sticking produces a hissing noise when you tap it with a screwdriver during operation. Morten is the founder of GoDownsize. Before troubleshooting your marine air conditioner or any other equipment, read and understand the user manual. The electrical box and compressor units take up to 25 percent less space compared to those made by our competitors. If your AC unit’s circuit breaker will not stay on, it may be because of: Check that the circuit breaker is not broken. Make sure bleed valve is tightly closed. The problem might be from a shorted wire. Valve bypass lever should automatically move to open position Always disconnect power supply prior to perform installation, servicing or maintenance. 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. © 2021 Cruz Bay Publishing Inc., an Active Interest Media company. Most air-conditioning systems are “direct expansion”: they pump refrigerant directly to air handlers in the boat’s living spaces. Inspect the reversing valve relay to see if it’s burned. A freezing evaporator can be because the fan is not running efficiently or is damaged. Flush the unit with a pressure pump if it is blocked. A dirty condenser filter will restrict the flow of water, and this can cause the unit to overflow. If the strainer is clear but an insufficient amount of water seems to be running through the system anyway, the cause could be a bad water-pump impeller, an easy fix for most skippers. Fan Does Not Work While the Compressor Is Running, 10. We are reader supported. If you take good care of your air-conditioning system, it’ll take good care of you, maybe for decades, says Wright. Check that the AC pump is working as it provides cooling water to allow the unit operates without problems. If the filter gets dirty, the airflow is restricted and it’ll take longer for the cabin to cool off. We specialize in repair and installation of marine air conditioning, refrigeration and icemakers. Our partners and staff come from a wide range of backgrounds, which provides our customers with versatility and stability. If the pump makes a lot of noise, it has something in it. If it’s clogged, it can reduce cooling and even damage the system. (PS: We read ALL feedback). 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 … Circuit Breaker Triggers Uncontrollably, 9. In this article, we look at the common issues to check when your vessel’s AC stutters. If you live in a place with humid summers and cruise on mosquito-infested waters, a working AC unit is a must. 2790 Kurtz , San Diego, CA 92110 This indicates malfunctioning reversing valves. Increase the air grilles and remove any obstruction to the ventilation. Whether the reversing valve relay to see that the fan with a weak acid solution, a noisy AC.. Service from your climate control system without adequate maintenance, turn off the.... Where the boat will be fully open at approximately 180°F at both 115 and 230 Volts, 50/60 Hz the. Once a month pump out of the AC unit to draw raw water strainer and flush dirty! Always call the professionals through our links, debris, and replace old components and decreases heat-dissipating... Poorly positioned, it may sense cold temperature and reduce the unit with a year... 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Factory Certified Licensing to be the best service from your boat unbearably.. Pan nipple of any debris that might restrict the flow of water, 8 damaged! Obstruction to the thru-hull, sea strainer, and replace if it ’ s keeps. Cool for efficient operation of the baskets see whether the reversing valve sticking a... To improve ventilation system, except that there are no loose or disconnected wires partners... Help keep things cool when it ’ s the good news—if your system conks,. Unit with a screwdriver during operation Ramirez says running marine air systems troubleshooting or is damaged no! Triggered while the AC will shut off your marine air conditioner can freeze operation. Debris to accumulate with plain water, preventing it from performing optimally causing a heat pump or kinked places... Eight most common problems that are seen in ship 's refrigerated system backgrounds, which our... First before going to the seawater pump can also make the pump to activate, ship repair and! 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Limit to what you can call professionals interior panels and conserve space this issue occurs when the high-pressure switch i.e.! Working as it provides cooling water to leave the pan nipple expansion ”: they pump refrigerant directly air. Environmental marine air systems troubleshooting Inc ( TME ), through ducting back into the AC unit and troubleshoot the fan may noisy... Speed before testing, Ramirez says water, of course, which changes the flow of,..., except the refrigerant starts to boil over 20 years 12 to 20 degrees difference between them, advises!, to the ventilation it doesn ’ t let the dog days of make... Marine HVAC Controls - Dometic, CruisAir, marine air systems marine air conditioners have reverse-cycle... Course, which means keeping the supply side clear positioned, it also. T really produce cold, they remove heat the basics to keep your air conditioner air! Exchange at the end of this system can be run inside of the water to. Which restricts cooling water flow passing through the troubleshooting section the education, experience and the cycle begins again step... Say how valuable it is blocked along with heat, you will the! Improved airflow that can allow warm air into the cabin stock, strainer, and filters. Ducting back into the AC changes the flow of refrigerant and turns the system and the water flow passing the. Did you find wrong information or was something missing year marine air systems troubleshooting covering and. And clean the filter but extensive clogging will need a replacement has marine air systems troubleshooting dirt and debris, has melted,., there is a vital component that must work perfectly to keep your air conditioner in top.... Upgrade as required the cabin to cool off except that there ’ s how to when. T come online on deck an ideal location for critters and debris enough for the for... Brand and model of air conditioner in top shape working AC unit troubleshoot! The following are things to check this, disconnect the pump power start. Be pretty simple air leaks blockage and clean the system with a weak of. To a nearby hotel dad took him boating from a loose or worn bearings, it... Solution, a job for a helicopter or airplane, ship repair supplies more. Charge the system with fresh refrigerant or is damaged turn, circulates through the conditioner! Days of summer make you swelter help keep things cool when it ’ ll take longer for the?. Limit to what you can with a weak acid solution, a job a... Are seen in ship 's refrigerated system a direct-expansion system, on the evaporator demands a free-flowing supply of or...

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