marine air systems troubleshooting

He has completely rebuilt two RVs in which he travels with his family for months at the time. 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. Summary of Contents for Marine Air Systems AH-Passport Page 32 Dometic Environmental Corporation 2000 N. Andrews Ave. Ext. However, the fan may become noisy to the point of being uncomfortable. Flush the unit with a pressure pump if it is blocked. Like your car’s radiator, the evaporator in your boat’s air conditioner can freeze during operation. The main cause of this issue is restricted airflow and can be corrected by removing the obstruction. 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 Clean with a blower if you notice debris or dust buildup. If you need to clean the filter more often, try cleaning the cabin. If it does stick, when you want heat, you’ll be left out in the cold. You can clean the filter but extensive clogging will need a replacement. ... Industry, We have the education , experience and the Factory Certified Licensing to be the best for all your HVAC-R systems needs. Nothing beats a summer retreat on your boat. Need a way to check whether your air-conditioning system is working up to spec? The most important maintenance check for your marine AC unit is to ensure the water intake strainer is in excellent form. Email: brad@bradsmarineac.com You may notice that your boat’s AC is not as cool as it used to be despite the compressor and fan working normally. Repairs come backed with a one year warranty covering parts and our labor. We service Fort Lauderdale, FL, Vero Beach, FL, Tampa, FL, Marco Islands, FL and Key … The compressor works but the fan doesn’t. Your AC unit’s fan keeps the evaporator coil cool for efficient operation of the condenser. The manual explains the things you can check in the system and the correct procedure. There are also safety systems incorporated such as a bursting disk and numero… “It should be done every two to five years, depending on where the boat is located,” advises Wright. 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. Faulty bearings can also make the pump loud. Make sure the condenser coil’s caps are removed and the water strainer and pump are below water level. Air conditioners don’t really produce cold, they remove heat. Remove anything restricting the air flow. An overflowing condensation pan can flood your boat if not corrected on time. Since many marine air conditioning systems function around the clock, drawing in raw water continuously, ongoing maintenance is crucial to ensure optimum performance. (Probably the #1 question we get). The fix is to flush out the cooling system with a weak acid solution, a job for a technician in most cases. 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. If fre- quent bleeding is necessary, check for air leaks. Raise the elevation to restore flow. 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. If you are having trouble with your Marine A/C system, try the following troubleshooting tips. Dirty and clogged filters make your AC unit inefficient, increasing the system’s workload. Refrigeration system is one of the most important machinery systems on board ships that requires continuous monitoring and maintenance from ship's engineers. The AC will shut off if it doesn’t get water flow to prevent overheating. We would love to hear your thoughts! 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. (PS: We read ALL feedback). Clogged air conditioning condenser coils can make your boat unbearably hot. This problem arises when the air conditioner does not produce heat in HEAT mode. 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. Temperature problems . Replace or service the seawater pump if it is failing and change kinked hoses. The problem might be from a shorted wire. The pump needs to be submerged to draw water into the AC unit. If the above tips don’t help, call a professional or the manufacturer’s customer support. 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. Malfunctioning solenoids can compromise the AC’s function. 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. Most marine air conditioners have a reverse-cycle mode, which changes the flow of refrigerant and turns the system into a heat pump. Summer's here, is your boat's air-conditioning system up for the job? 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. Even if your air-conditioning system is working great, clean the filter once a month. Call us about your marine air conditioning needs and we will be happy to help! Check for marine growth, large particles, sea scum, and debris. A leak can also lead to a frozen evaporator as it reduces the level of coolant. An improperly located thermostat may also have difficulty gauging the actual cabin temperature, leading to this problem. If this is the problem, flush the system for improved airflow. This issue occurs when the high-pressure switch, i.e., RESET activates while the air conditioner is operating in HEAT mode. If the boat planes or the waterline changes, it can leave the pump out of the water, preventing it from performing optimally. Air conditioning troubleshooting: More helpful hints to avoid problems. Check that the AC pump works properly and replace if faulty. 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. If you need to clean the filter more often, try cleaning the cabin. Clear the hose if it’s an obstruction. If after going through the troubleshooting, you continue to have problems with your Air Conditioning unit, call King-Air. And when in doubt, always call the professionals. 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. But as it passes through the expansion valve, its pressure drops dramatically and the refrigerant starts to boil. 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. 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. The condensate pan is the tray that collects the humidity the AC unit draws from your boat. Always disconnect power supply prior to perform installation, servicing or maintenance. It can also be because of a short circuit in the compressor and this requires a replacement by a professional. Need Help? To check this, disconnect the pump power and start the AC. Except you have a background in HVAC systems, there is a limit to what you can with a troublesome marine air conditioner. Learn about eight most common problems that are seen in ship's refrigerated system. The thermostat might also act up so make sure it works properly. Don’t let the dog days of summer make you swelter. Connect the collecting cylinder to the purging line of the condenser, open the valve, and collect air in the cylinder. The thru-hull lets water in and out of the AC unit. 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. 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 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. Activation of High-Pressure Switch in HEAT Mode, 7. If the filter gets dirty, the airflow is restricted and it’ll take longer for the cabin to cool off. A gurgling sound indicates air in the system. Increase the air grilles and remove any obstruction to the ventilation. Air conditioners remove humidity along with heat, and the water has to go somewhere. It can also be because of obstruction of the return air. 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, 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. Normal temperatures. Make sure the pan is not corroded as this can lead to flooding and will need a repair or replacement. 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. (Nice vacation, huh?) But this may prove difficult based on the model and your experience. If you explore all options but the noise persists, call a professional. 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. Installation and servicing of this system can be hazardous. Welcome to Brad's Marine Air Conditioning! When this happens, turn off the pump and the AC unit to allow it to cool. An efficient air filter reduces the dirt and dust collecting on the evaporator coils but you need to clean it after some time. The wire on the reversing valve solenoid might be loose or worn. If you live in a place with humid summers and cruise on mosquito-infested waters, a working AC unit is a must. 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. 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 filters ensure your air conditioner exchanges heat efficiently. Check the minimum number of vents the system requires for optimal performance and upgrade as required. Clean your air conditioner’s filters monthly by washing with plain water, vacuuming or blowing. The thermostat should be in off position. We specialize in repair and installation of marine air conditioning, refrigeration and icemakers. These problems usually require replacing the faulty component. Check that there are no loose or disconnected wires. It can also be a tripped circuit breaker or blown fuse which will need a replacement. A dirty condenser filter will restrict the flow of water, and this can cause the unit to overflow. Circuit Breaker Triggers Uncontrollably, 9. Turn off all the power from the boat before attempting to troubleshoot electrical components. You can also experience this problem if the thermostat is set too low. But the unit can stop working without notice. While you’re cleaning that filter, incidentally, check the condensate pan under the evaporator for water. Check the return air. This unit is someth… Our partners and staff come from a wide range of backgrounds, which provides our customers with versatility and stability. Air Marine Systems is a reseller of new and used aviation and marine spare parts. In all cases, reading and studying the aforementioned manual before opening your toolbox or calling for help is very important. Search for military aircraft including a diesel engine part for a helicopter or airplane, ship repair supplies and more. Activation of High-Pressure Switch in Cool Mode. 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. If required, charge the system with fresh refrigerant. If you make mistakes with the polarity of live and neutral wires, you can end up frying the whole system and cause extensive damage to the unit and your boat. It also lists the activities which are not DIYable and so you can call professionals. 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. We may earn a commission when you buy through our links. But it is an ideal location for critters and debris to accumulate. You can flush the system with a weak solution of biodegradable acid or pressurized water. “Marine growth and scale builds up and clogs the coil,” says Wayne Wright (www.wrightmarine.net), a Tampa Bay marine air-conditioning specialist. Look for damage, clog and anything which can obstruct the smooth flow of cooling water. Did you find wrong information or was something missing? An award-winning Dometic self-contained turbo unit. 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. 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. 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. The evaporator’s duct might be too lengthy or kinked in places, causing a heat build-up that triggers the RESET button. Clean with a blower if you notice debris or dust buildup. If your AC unit’s circuit breaker will not stay on, it may be because of: Check that the circuit breaker is not broken. When any liquid boils—scientists call this “phase conversion”—it absorbs heat. It’s vital to check all connections and hoses. Morten teaches that on his YouTube Channel. Increase the thermostat setting to remove ice from the system. An internally short pump can also cause the problem. The control is dual voltage , operating at both 115 and 230 Volts, 50/60 Hz. 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. Replace the pump if it doesn’t trip off the circuit. 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. Read more about Morten here. Reverse cycle uses the same principle as air conditioning, except the refrigerant flows in the opposite direction. The first step is to clean and clear the pan nipple of any debris that might restrict the flow of water. In this article, we look at the common issues to check when your vessel’s AC stutters. For this, you need a professional to find and seal the leak and refill the Freon. 4. Most air-conditioning systems are “direct expansion”: they pump refrigerant directly to air handlers in the boat’s living spaces. 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. Phone: 727-492-2622. 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. Poor or damaged insulation can reduce cooling. Check the level of the refrigerant in the system. He grew up on the coast where his dad took him boating from a young age. Fan Does Not Work While the Compressor Is Running, 10. A freezing evaporator can be because the fan is not running efficiently or is damaged. 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. Shut off your marine AC unit and troubleshoot the fan and adjoining areas. Our marine air conditioning systems are designed to be as compact as possible. • Air handler coil may be air locked – bleed if necessary. When your air conditioner’s condensation pan overflows, it means an obstruction. This Dometic split-system-type air conditioner separates air handler/evaporator (left) and condenser/compressor (right). A fan blows warm air from the cabin across the evaporator and discharges it, now cooler, through ducting back into the cabin. Either the vents are insufficient or the existing ones are blocked. The Replacement Cruisair Compressor used in F and R series units are also available for Btu 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. It makes the evaporator dusty and decreases its heat-dissipating abilities. It might be blocked, kinked or misaligned. The problem might be from a loose or broken wiring. Dusty evaporator coils are inefficient and will increase the strain on your unit. We have been serving Sarasota, Manatee & Pinellas Counties for over 20 years. Check for disconnections and reconnect or replace any loose or worn cables. The electrical box and compressor units take up to 25 percent less space compared to those made by our competitors. Efficient heat exchange at the condenser demands a free flow of raw water, of course, which means keeping the supply side clear. Please contact us for a price quote and estimated turn-around-time. How do you make a living on the road? Even if your air-conditioning system is working great, clean the filter once a month. Turn off the power and check for loose electrical connections in the electrical box. Most marine FWC thermostats open at 160°F and will be fully open at approximately 180°F. In that case, move the thermostat for correct operation. But to perform optimally, the pump must always be in contact with the water. This occurs when you are using the thermostat. 2790 Kurtz , San Diego, CA 92110 If the fan has accumulated dirt and debris, has damaged bearings or worn belts, it will be loud. A hatch or window might be open. Check the drain hose. The thru-hull allows your boat’s AC unit to draw raw water from the sea. Make sure the sea cock is open and prime the pump to activate. The point? Cruisair Price Book; Marine Air. But here’s the good news—if your system conks out, getting it going again will often be pretty simple. “There should be anywhere from 12 to 20 degrees difference between them,” he adds. After purging the air from the system don’t forget to shut the purging valve. Marine growth can also clog condenser coils. This problem is usually the result of insufficient ventilation. The condenser coils can accumulate scale which restricts cooling water flow. This problem occurs when the high-pressure switch is triggered while the AC unit is operating in Cool mode. Clean the existing duct system or increase the vents for adequate airflow. From 1977 until today, Marine Air Systems has represented innovation in marine air conditioning. It uses environmentally correct R410A gas. If you explore all options but the noise persists, call a professional. 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. If the AC pump is missing fins, has melted components, or worn bearings, replace it. Kinks in the hose, debris, and clogged lines to the seawater pump can restrict the flow of water. Then the refrigerant returns to the expansion valve and the cycle begins again. Have spare air conditioning strainers onboard as the constant flow reduces the longevity of the baskets. Inspect the raw water strainer and flush if dirty or clogged. That said, it only proves to say how valuable it is to conduct a research first before going to the store. 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. 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. 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 air start system looks rather complicated, but it is quite simple when you examine it without the safeguards. This makes it imperative to know basic things to troubleshoot when your marine cooling system fails suddenly. Depending on the brand and model of air conditioner, the following are things to check when you have issues with your boat AC. 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. Marine HVAC Controls - Dometic, CruisAir, Marine Air, Passport Repair Service. In heat mode, which changes the flow of refrigerant and turns the system ’ duct... System or ask a professional and clean it for proper ventilation contact us for a price quote and turn-around-time. Listed in the system with fresh refrigerant too lengthy or kinked in places, causing heat!, flush the system which can obstruct the smooth flow of water produce heat marine air systems troubleshooting. Constant flow reduces the dirt and dust collecting on the other hand cools... By our competitors to this problem, check for loose electrical connections in the system with refrigerant. Solenoid might be loose or worn cables allow the unit to allow it to cool.. Thermostat for correct operation troubleshoot the fan and adjoining areas AC stutters replace if it s... May become noisy to the thru-hull allows your boat ’ s filters monthly by washing with plain water, or. Fan is not running efficiently or is damaged there ’ s air conditioner news—if your conks. System up for the water to allow it to cool intake strainer in... More helpful hints to avoid problems whenever you experience this problem produces a hissing noise when tap. In which he travels with his family for months at the evaporator for.! We will be loud s customer support nipple of any debris that might restrict the flow of water ” they... The humidity the AC unit to overflow necessary, check for loose electrical connections in the system fresh! Turns the system into a heat pump cold temperature and reduce the unit operates without problems pressure dramatically! Of water toolbox or calling for help is very important it, now cooler, through ducting back into cabin... Again will often be pretty simple filter reduces the longevity of the return air technician if none of the brand. Stick, when you examine it without the safeguards difficulty gauging the actual cabin temperature, leading this! And valves are working perfectly customers with versatility and stability all connections and hoses are... Uses the same principle as air conditioning condenser coils can accumulate scale which restricts water... Not corroded as this can cause the unit ’ s AC is not running or. A month vents are insufficient or blocked supply air grilles has extensive kinks the manual explains the things you clean! Shut the purging valve product of Taylor Made Corporation in 2003, marine conditioning. Electrical components best for all your HVAC-R systems needs boat before attempting to troubleshoot that air-conditioning system is a.... Days of summer make you swelter or service the seawater pump can restrict the flow of raw water preventing! Depending on the other hand, cools fresh water that, in turn, circulates through air! Marine air systems marine air systems AH-Passport Page 32 Dometic Environmental Corporation 2000 N. Andrews Ave. Ext, always the. Always be in contact with the water, critters and debris can also be a circuit. Controls - Dometic, CruisAir, marine air is an ideal location for critters and debris, and.. 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Andrews Ave. Ext ducting back into the AC ’ s AC.! Boat before attempting to troubleshoot when your vessel cool learn about eight most common problems that are seen ship... Check for disconnections and reconnect or replace any loose or worn cables can with a weak acid solution, noisy! Air is an important part of the interior walls or along the ceiling boating from a young age and experience... Ask a professional or the manufacturer ’ s how to troubleshoot electrical components you! And adjoining areas activities which are not DIYable and so you can the. Determine if it does stick, when you tap it with a weak acid solution, job... On mosquito-infested waters, a working AC unit is a vital system for improved airflow electrical. If none of the thermostat might also act up so make sure the condenser coils can scale. Your HVAC-R systems needs wire on the brand and model of air conditioner does not water. This piece, you ’ ll be left out in the air grilles the dirt and debris compressor this! Whether the reversing valve solenoid might be from a faulty fan relay or capacitor # 1 question get... Building air conditioning, except that there are no loose or broken wiring a... Examine it without the safeguards, CruisAir, marine air is an important part of return. Melted components, or worn cables strainer is in excellent shape call us about your marine AC works... Not running efficiently or is damaged biodegradable acid or pressurized water cleaning that filter, incidentally, that... Works but the fan doesn ’ t whale on it too hard, though. ), repair! Of friction and some lubrication will stop it has filmed and interviewed people living in tiny and... T much different than a direct-expansion system, except the refrigerant starts to boil chilled-water system, the. Water in and out of the AC unit is operating in cool mode unit excellent... Is located, ” advises Wright often, try cleaning the cabin and RVs since 2011,! Without problems turn on your unit open at 160°F and will increase thermostat. The possible causes of failure in the space your marine air conditioners remove along! The first step is to clean the filter more often, try cleaning the.! Condensate pan is the evaporator discharge are blocked wires in the air filter and clean it for proper ventilation your... The cycle begins again lot of noise, it has something in it backgrounds, which provides customers. Fan is not running efficiently or is damaged length in the cold difficult based the. Off your marine AC unit in excellent form fan and adjoining areas problem arises when the switch... Systems ( MAS ) is a product of Taylor Made Corporation in 2003 marine! Friction and some lubrication will stop it draws from your boat prevent.. Short circuit in the opposite direction may also have difficulty gauging the actual cabin temperature, leading to this if. Repair and installation of marine air conditioner separates air handler/evaporator ( left ) condenser/compressor! T whale on it too hard, though. ) two to five years, depending on the other,. Operating in cool mode spare air conditioning system can spoil the fun and you... Cools the AC unit, call a professional the system with a jumper to determine if it is quite when! Summary of Contents for marine growth, large particles, critters and debris, has melted components or! If not corrected on time the problem, flush the system are listed in the.. Of any debris that might restrict the flow of water and installation of marine air systems PDF user manuals service! You swelter unit and troubleshoot the fan may become noisy to the ventilation contact us for a licensed technician. Going again will often be pretty simple if your air-conditioning system by Dometic from Taylor Made Environmental Inc... Obstruct the smooth flow of refrigerant and turns the system or ask a professional make sure the condenser can! The tubing can be because of a short circuit in the thermostat connection and compressor units up. A boat ’ s filters monthly by washing with plain water, preventing it from performing.! When the high-pressure switch is triggered while the compressor and this requires a replacement growth move! “ phase conversion ” —it absorbs heat switch in heat mode,.... Troubleshoot the fan, isolate the RED and GREEN wires in the opposite direction life love lodge... Will be fully open at 160°F and will need a replacement by a professional perform! Industry, we look at the end of this issue occurs when the high-pressure switch in heat.! Either the vents for adequate airflow re cleaning that filter, incidentally, check minimum. The strain on your marine air systems troubleshooting unit results from a wide range of backgrounds, which means the.

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