Low applied costs and a short payback time. Discussion in 'Maintenance and Troubleshooting' started by Mark Custis, Feb 12, 2014. We are MCS Accredited, and have over 20 years of experience with heat pump technology. Low head pressure may occur simulataneously with high pressure on the suction side of an air conditioner, heat pump or refrigeration system compressor system. VAT number: GB 156722794. It’s best to be running at 1 bar in summer, this will drop though in winter as brine cools. page 17 of the NIBE 1145 installation manual. These may include pre-heating season checks of the water pump, external pipes and fittings and electronics. Ground Source Heat Pumps are the best way for you to get environmentally friendly hot water, heating, and cooling. It has to be manually reset by removing the front cover and locating rotary switch FB1. High pressure switch failure – check connection onto board and continuity of switch . Heat Distribution, Architects If you have any safety concerns, we suggest you immediately switch off the system via the rotary isolator, located in the vicinity of the installation. Supplied with the heat pump on delivery. compressor (low pressure to high pressure gas) and . The Latest Generation. Mis-wiring fault … Ground source heat pump systems take heat energy from the ground and pass it through a heat exchanger into a heat pump, which works like a refrigerator but in reverse. Energy Consultants More information can be found on page 17 of the NIBE 1145 installation manual. Low Pressure fault - no or low water flow: Check water valves and/or pumps for proper operation. Even though the … The VVM 320 unit, when placed in emergency mode reduces the heating capacity and the hot water capacity. We would love to speak with you to discuss your project – upload your plans for a free quote. Despite the comparative simplicity of an air source heat pump system, it is not a plug-and-play solution and it still requires experienced and specialised engineers to maximise the system’s potential. If you can’t find a video for your problem, we suggest using Google and/or YouTube to search for the problem code on your machine. if the compressor now starts in auto or in manual test there might be a fault in the operating pressure switch, replace the operating pressure switch. This value is useful when comparing one heat pump to another. To do this, turn the heat pump off, remove the cover and push the reset button using the smallest electrical screw driver available in hole FD1-SF2. Heat pumps use the heat in the air or the ground around them as their main source of energy. The Ground Source Heat Pump Association says there is no need for safety checks for ground source heat pumps and routine maintenance requirements are very low. The heat pump concentrates the stored heat energy and heats water for your showers and radiators. Both pressure switch contacts are open at the same time. The integrated high pressure switch tripped at 3 MPa (30 bar) (g). pump compared to the electricity required to run it is known as the appliance ‘Coefficient of Performance’ or COP. Have you checked that the thermostat is working – wireless thermostats require a battery to operate, have you checked this? If the location has access to an aquifer, as is often the case in the South East of England, an … supply temperature in the heating system or if one has too low a flow over the heat pump. The unit will trip out on what the unit thinks is high refrigerant pressure… 28: Coolant pressure too low Brine side/well water side is supplying too little heat. Ground source heating is a form of low carbon heating, as it does not burn any kind of fossil fuel to work. We work with homeowners, self-builders, and industry professionals in the UK. Does the pipework to the radiator feel warm? But if the temperature is above the mid 30’s and it’s still running all the time, you could have a service issue, such as leaking refrigerant, a frozen outdoor unit (as we mentioned in heat pump troubleshooting problem #1), or compressor problem. Unit 3, Ruthvenfield Way, Inveralmond Industrial Estate, Perth, PH1 3UF, Privacy Statement Obviously in optimum conditions, and due to the COP, the input energy will be much lower. IVT Greenline HE Ground Source Heat Pump is the latest generation of the famous Greenline product family. Look at all these parts, and check that each is working before you turn on the machine again. Ground source heat pumps. Water heat pumps can also be used where water is available as a heat source. Pictures – We may ask for you to send pictures to assist our diagnosis. A slinky, in heat pump terms, is when the pipes that collect heat from the ground are coiled up repeatedly and wrapped over each other. Outdoor unit HT & LT: Low pressure drop due to refrigerant shortage or electronic expansion valve failure (R410A) U2 Outdoor unit HT & LT: Power supply insufficient or Instantaneous failure, low or high voltage detected (R410A) Press down button (-) to go to Aux or Add Heat, Press right button to select. A poorly designed and installed ground source heat pump system will, effectively, be heating a property on electricity alone, which is by far the most expensive solution on a unit-by-unit basis. Have you checked the temperature reading on your control panel? If towel rails are fitted on a DHW primary coil, ensure signal wire to the DHW zone valve is taken from terminal 11 on 1145 PCB as per A14 docking drawings (page 3 of 4), and not terminal 7 as it was on old drawings. A poorly designed and installed ground source heat pump system will, effectively, be heating a property on electricity alone, which is by far the most expensive solution on a unit-by-unit basis. Air To Water Split Type Heat Pump CLICK HERE . More information can be found on page 17 of the NIBE 1145 installation manual. The heat pump can start again after a 60 minute wait at the earliest. – this should tell you what the temperature of the hot water should be. Terms & Conditions or at the point of entry into your property? Reg. Smart Underfloor Heating Thermostats & Controls, Become a heat pump installer and grow your business by 20%. Depths of boreholes range from around 60m to 200m. × Overview Description Technical Specifications Manuals & Guides. If there is no pressure and no Glycol, it could be a leak – most probably on a connection in the manifold pit. When a low valve temperature fault occurs, the compressor will stop, ... generally manifested as a low valve temperature failure rather than a low pressure failure. The whole point about heat pumps is the efficiency varies with the temperatures required. Ground source heat pumps can perform better with low temperature heating systems, such as underfloor heating or low temperature, fan assisted radiators – such as Dimplex SmartRads. 1. With a large range of outputs, both single phase and three phase, between 6 - 17 kW there is sure to be an IVT Greenline HE heat pump … You can contact our Technical Support Team via tech.support@nu-heat.co.uk or give them a call on 01404 540745 between 8am and 5pm, Monday to Friday. Alternatively, a horizontal collector loop … 4. So what are the common problems that befall GSHPs? Usually, v ertical collectors go down to as much as 100m or more, depending on the geology of the area and how much heat you require. temp. 1. Combined geothermal heating and cooling systems are also now … The heat pump compressor, however, has two main purposes: to maintain the refrigerant flowing inside the heat pump and to increase the pressure in which the refrigerant is compressed into gas. They save space and minimise disruption in heat pump installation projects, as you usually only need 150mm width of garden space per borehole. Radiators – Is the radiator cold? The heat pump does the work. Your whole property? < < Contents < < Contents 3 The amount of heat produced by the heat . Is there a TRV (Thermostatic Radiator Valve) connected and is turned up and working? If hot water is coming out of some, but not all taps it could indicate an issue with your non-return valve or specific tap(s) and can be dealt with by a professional plumber. Need more help to resolve a NIBE ground source heat pump problem? An ‘*’ should have moved from Auto to your new selection. an expansion valve (high pressure to low pressure). Video Calling – We have the capacity to video call you using Skype, WhatsApp or FaceTime. The individual Ecodan units offer 60kW capacity and 16 units can be linked together to offer full multiple unit cascade control. Older FTC controllers have a hot water boost button, 15, 30 & 60 min function you will need to press this button to heat hot water. I need some input. Ground Source Heat Pumps that contain the in-built additional heater will require to be placed into additional heating mode through the control panel. F5. A ground source heat pump system can help to lower your carbon footprint as it uses a renewable, natural source of heat – the ground. Have you checked with the electrician that they have completed all works, and connected the system back-up correctly? This can be easily topped-up through the filling loop provided. spread" (20 K spread means deactivated). Despite the comparative simplicity of an air source heat pump system, it is not a plug-and-play solution and it still requires experienced and specialised engineers to maximise the system’s potential. Installation quick guide containing information to install a heat pump. or is this happening across your entire neighbourhood?. You should call your local water supplier or plumber to help you if this is the issue. Accreditation associated with Heat Pumps. Browse our website for full details, then give us a call on 0845 459 9820 to place your order. Replace the pressure switch if it appears to jam repeatedly in the open position. If the system is continuing to cool it may be doing so at reduced capacity, observed as a loss of up to ten degrees of temperature drop across the coil. The two most common causes of low head pressure at an air conditioner or heat pump compressor motor are: Refrigerant under-charge, due to a refrigerant leak or improper charge. This heat is then used to provide space heating and hot water. Renewable Heat Incentive (RHI) Vaillant customer services can be reached on 0330 100 3540. The … As seen in the illustration above, a ground source heat pump uses a considerable loop of pipe with liquid. Does this mean the unit is not using the Aux Heat and continues to use the geo source? An installer can investigate this issue. The Latest Generation. Is flow being indicated to the area you are having problems? LP alarms are common with leaks and occur due to low pressure in the refrigerant due to poor flow on the brine side of the heat exchanger, effectively cooling it right down. We use cookies. Developers, Sheffield When a compressor has problems, both or at least one of these functions stop happening, and very likely the heat pump won’t do its job as expected. No. The fluid is then passed through a compressor where the increase in pressure causes an increase in vapour temperature. East Midlands, FAQs The reason why this works is because the ground under the surface is fairly cool and constant in temperature. Have you had any electrical works completed at your property recently? Operate Mode at top of list, press right arrow again to open sub-menu. It will now request system shut down, select yes. Online – If you, or we, have access to your heat pump online we will try to use this if we can to assist. The cooled ground-loop fluid passes back into the ground where it absorbs further energy from the ground … If the heat pump is asked to produce higher temperatures, for a conventional radiator circuit, then its efficiency will reduce. Does the pipework to the manifold feel warm? Have you checked with the plumber that they have completed all works, and connected the system back-up correctly? Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. © 1997-2021 Nu-Heat UK Ltd. All rights reserved. Ground Source Heat Pump CLICK HERE . F3. Remove parts and replace if you feel that they are not working properly. DC Inverter Air Cold Water Chiller Heat Pump CLICK HERE . It has to be manually reset. It’s widely accepted in terms of good pipe laying practice that sand should be employed both below and above the pipe to protect from sharps as even PE100 Pipe Material is vulnerable to rapid creep … F9. The previous owner says he had water flow issues in the early days due to incorrect installation of the ground loop (once the loop enters the basement it has a couple of 90 degree turns going up/down internal walls to the actual unit). The liquid in the loop circulates and is heated by the stored solar heat deep down in the ground or in the lake. Things to check as well as leaks: check inline strainer on ground loops is clean and check all valves are fully open, brine pump running so brine in/out temps have 3-5°C differential. It uses the earth all the time, without any intermittency, as a heat source (in the winter) or a heat sink (in the summer). Customer Login. Insulating the wrong pipes, fitting … temp. Property & Land Managers We have a groundsource heat pump rated at 6.5kW, and the compressor motor which is the majority of the load is a 2.2kW, drawing approximately 1.5 kW … Look at all these parts, and check that each is working before you turn on the machine again. Heat pumps do run longer and put out less heat as compared to a furnace. Low Pressure fault - low refrigerant: Check refrigerant pressure with gage set: Is fault LED Blinking 3 times? In menu it will say option for Heat Source, go to this and select by pressing tick button. There are also many videos on YouTube that would assist you with identifying and correcting this issue. If the system is continuing to cool it may be doing so at reduced capacity, observed as a loss of up to ten degrees of temperature drop across the coil. Check that both the cables for the operating pressure switch are in position If the pressure switch is closed, bridge the operating pressure switch cables temporarily and switch on the voltage to the heat pump again. No water at all – hot or cold? North East England The third basic element of a ground source heat pump, the heat distribution system, can be either low temperature radiators or, preferably, underfloor heating. Heat from the ground is absorbed at low temperatures into a fluid inside a loop of pipe (a ground loop) buried underground. Case Studies Compressor symbol (blue piston symbol) showing on menu 3.1 and on page 19/24. Buried pipes or ‘slinkies’ are used to absorb heat from the ground. This can be … Is the water warm, but not hot? If this is recurring, it could be a flow issue. The Service instructions contain information about the heat pump’s function, accessories, fault tracing and technical data. Registered in England. Your cylinder may be coming back up to temperature – check again in 30 minutes. Accomplishment of several research projects concerning the optimization and improvement of heat pumps together with development of a generic model of heat pump systems have provided a great opportunity for us to design a comprehensive Fault Detection and Diagnosis system for heat pumps. Consumer Terms & Conditions | Trade Terms & Conditions | Cancellation Form | Cookie & Privacy Policy | Product Warranties. The hot water cylinder should have the immersion heater wired independently, you should switch it on for hot water. Ground Source Heat Pumps are heat pumps that absorb and release heat from the ground through a heat exchanger. No ground water flow Integrated flow switch does not detect any volume flow: 27: Coolant pressure too high Heat consumption of heating circuit is too low. Failure to heat is probably the first sign that something is wrong, but a complete lack of heat suggests a couple of simple reasons that you can fix in a few minutes. Mastertherm Units do not have this function. If it is not reaching this temperature from only some taps, again this could indicate an issue with the non-return valve or the specific tap(s). Possible unsteady voltage has been supplied to the unit, meaning the motor protection trips to protect the compressor. Have you had any plumbing works completed at your property recently? Lack of installer knowledge: As with ground source heat pumps, air source heat pumps are only as good as the company that installs them. Apparently a … Other options are available for this product. 0 bar pressure in ground loops is OK as long as Glycol is present in the vessel. The switch should be in the horizontal position. No power at all? The most common problem with any heat pump system is low water pressure in the heating distribution, denoted by the pressure gauge on the system. Too high pressure may be another effect of the device. So what are the common problems that befall GSHPs? Heat pump boreholes are vertical ground arrays or collectors used to extract heat energy from rock to a ground source heat pump. As the liquid passes through the heat pump, it meets another closed system. Ecodan Heat Pump Fault Codes Making your home more energy efficient with heat pumps. It is a tried and tested technology. Heat Pump (Menu 4) – Op Mode (4.2) – Move to ‘Add Heat’, Air Source Heat Pumps do not have an ‘additional heating’ for the heating distribution system however the  domestic hot water can be heated using the in-tank immersion heater. Press tick button, password should be 0000 so press tick button again. Press circle button in bottom left corner to open menu, the one that looks like a square with lines on. If your heat pump is working but you are unable to re-set or troubleshoot the error you are experiencing you can put your heat pump into ‘Aux Mode’ which , depending on your heat pump, can provide you with hot water and / or minimal heating until someone can call out to investigate the problem. LP alarms are common with leaks and occur due to low pressure in the refrigerant due to poor flow on the brine side of the heat exchanger, effectively cooling it right down. Low Pressure fault - low refrigerant • GPM: Pressure Differential between Water In and Water Out at unit coax. Low pressure switch failure – check connection on the board and continuity of switch. if the compressor now starts in auto or in manual test there might be a fault in the operating pressure switch, replace the operating pressure switch. West Midlands Geson chiller product range covers Industrial Refrigeration and Commercial Central air-conditioning, including Water-cooled chillers, Air-cooled chillers, Screw chillers, Scroll chillers, Centrifugal chillers, Water(ground) source heat pumps, Air source heat pumps and etc., Capacity from 2tons~4000tons, and temperature from -160℃~30℃, complete full product series for … Accreditations, Memberships & Awards © 2019 IMS Heat Pumps. The function of the evaporator is critical, as … Available in 230V and 400V options, with a choice of outputs to choose from, Vaillant heat pumps can cater for small and large domestic properties, in addition to commercial projects. Come and buy your Ground Source Heat Pumps. We will try to assist you in any way we can and appreciate your understanding in these unprecedented times. Is this to the heat pump only? Leave a message and someone will get back to you*, *(not during the weekends or bank holidays), About Us Phone Calls – We can talk you through items to check, once we have fully understood the issue you are experiencing. This vapour has the same pressure than the previous mix, but its temperature is slightly higher. Press right arrow button to enter information menu (might need to press twice). I have a WF unit with an ECM blower. Events & Trade Shows. In fact, ground source heat pumps may seem complex, but they use exactly the same technology as your fridge or freezer. North West England 21 The … Blenheim Reach, Office 1, 5th Floor, 861 Ecclesall Road, Sheffield S11 8TH, Perth Check for water coil blockage. Press power button, large circle button on right, to turn back on. There is a refrigerant that turns into a gas at very low … Home Forums > Geothermal Heat Pump Info > Maintenance and Troubleshooting > High pressure fault in heating. Therefore, the temperature transfer required for the geothermal pump to heat or cool down your home is less demanding. Have you experienced a power outage at your property? Things to check as well as leaks: check inline strainer on ground loops is clean and check all valves are fully open, brine pump running so brine in/out temps have 3-5°C differential. Accomplishment of several research projects concerning the optimization and improvement of heat pumps together with development of a generic model of heat pump systems have provided a great opportunity for us to design a comprehensive Fault Detection and Diagnosis system for heat pumps. If hot gas, liquid line and suction gas temps are all room temperature then it is possible this is a soft start failure. So, one of the last things to do when starting, servicing, or troubleshooting a geothermal heat pump is to add water pressure, using one of the many tools available for that purpose. A slinky, in heat pump terms, is when the pipes that collect heat from the ground are coiled up repeatedly and wrapped over … According to the Energy Saving Trust, a heat pump with mid-range efficiency would save you most carbon when used to replace an old electric heating system (with storage heaters) or coal heating system. The project aims at: 1. This working fluid is a cold and low pressure mix of liquid and vapour. Mitsubishi Ecodan FTC5, EHPT, EHST, EHPX, EHS Cylinder Hydrobox Operation Manual, Mitsubishi Wireless Controller User Guide PAR-WT50R-E, Mitsubishi Ecodan FTC5 Homeowner Quick Start Guide, Mitsubishi Ecodan Aerocyl Plus-me: Air Source Heat Pump and Stainless Steel Cylinder, Mitsubishi Ecodan FTC5 Main Controller User Guide, Mitsubishi Ecodan FTC3-4 Homeowner Quickstart Guide, Mitsubishi Ecodan FTC4 Controller User Guide, Mitsubishi Wireless Controller User Manual BH79R517H01, Thermia User Manual Diplomat Duo Optimum G2. Repressurize the ground loop Most closed ground loop systems lose pressure over time, especially during the cooling mode. A fundamental and critical component of any efficient performing Ground Source Heat Pump System are the collector pipes where pipe protection and longevity are paramount. Description. Read more about them in our Privacy Policy. Now press back button to go back to beginning, but now the screen will be blank. Within this heat exchanger, the heat is absorbed by a refrigerant, which evaporates and becomes a gas. EA. Underfloor Heating – have you checked the manifold that feeds the area? All Rights Reserved. 3131852. This heat causes the working fluid to evaporate, that is, to become pure vapour. This could be high pressure in the refrigerant, caused by poor flow on the waterside of heat exchanger in the heat pump so it overheats. If the pressure switch is open, try carefully tapping the head of the operating pressure switch with a screwdriver and use a buzzer test to see if it has closed again. A geothermal heat pump (GHP) or ground source heat pump (GSHP) is a central heating and/or cooling system that transfers heat to or from the ground, often through a vapor-compression refrigeration cycle.. The unit is +18 years old. This pressure differential can be converted to GPM using a pressure drop table for each unit at the correct EWT(Water In – Water Out = dP) • Fluid Factoris the ability of a solution to transfer heat in a certain period of time. 10. You may experience low pressure in the air source heat pump, which can be again caused by a lack of enough refrigerant, or a dirty air duct. Builders The motor is … Ecodan Fault Codes. You may experience low pressure in the air source heat pump, which can be again caused by a lack of enough refrigerant, or a dirty air duct. The fluid then passes through a compressor that raises it to a higher temperature, which can then heat water for the heating and hot water circuits of the house. Press F3 button, these aren’t marked on controller, until you get to service. Ground source heat pumps are extremely energy efficient, for every one unit of electricity used (to drive the pump and compressor), around 4 units of heat are produced. Blog and News IMS Heat Pumps is a specialist in designing and installing Ground & Air source Heat Pumps systems. Regarding the ratings of heat pumps, what is classed as an 18 kW heat pump has a maximum ‘theoretical’ output of 18 kW of heat. In order to increase the diagnostic accuracy of ground-source heat pump (GSHP) system, especially for multiple-simultaneous faults, the paper proposes a multi-source information fusion based fault diagnosis methodology by using Bayesian network, due to the fact that it is considered to be one of the most useful models in the filed of probabilistic knowledge …