How to onboard devices in Grundfos Connect Once you have created your digital assets, it is time to install the connectivity gateway (CIM 280 or CIM 550). Romania GRUNDFOS AB GRUNDFOS Pumpen AG GRUNDFOS POMPA San. This can be remedied by installing a larger pump. In order to vent the pump rapidly, set the pump to maximum speed and let it run for half an hour. May 7, 2024 · Grundfos circulating pump troubleshooting guide to fix clogged valve or impeller, cold water circulation, energy-consuming circulation, dysfunctional pumps, and helpful maintenance and installation tips. Moved into a house recently that was built in 2006. Watch out: the pump may be running fine and the problem could be an air-bound heating zone. The operating instructions provided with every Grundfos product contain relevant troubleshooting information. In many cases after your central Feb 20, 2023 · If the pump was installed less than 5 years ago, make sure to check your manufacturer warranty, you may be able to replace the pump under warranty. If a dosing pump of the wrong configuration or size is installed, processes may be negatively impacted, and unnecessary cost increases may be experienced. 1 Nameplate. Note that this entire operation remains on the clean side of the Sololift2. Any pros/cons to Learn how to monitor and calculate pump performance by using the three parameters—flow, pressure and power consumption. If your furnace or air conditioning won't run and there is a puddle The UP 10-16 range sets a new standard for energy-efficient hot water recirculation in residential homes. This is also why the efficiency of a complete pump unit is lower than the efficiency of just of a pump. Both variants are recommended for underfloor heating systems. It boosts water pressure by actively pumping water into the system when pressure drops below a set level, ensuring consistent pressure throughout the home. Jul 30, 2018 · How to Troubleshoot a Grundfos MQ Pump. The fuse of the pump's electrical supply line has tripped. Check if the pump is running: If none of the indicator lights are on, it could indicate a blown fuse or a switched-off external circuit breaker. The pump blocked alarm will stop the pump. The Grundfos MQ is a compact, self-priming multistage centrifugal pump designed for domestic water supply. Grundfos will not be liable for any costs of removal, installation, transportation, or any other charges which may arise in connection with a warranty claim. 2 Maintenance The lifting station does not require any special maintenance, but we recommend that you check A hot water recirculation pump keeps a constant flow of water through your pipes, so you no longer have to wait for hot water when turning on the tap. No voltage. Closed systems Model UP(S) 15, 26, 43 and 50 series pumps with cast iron pump housings are designed to pump water compatible with their cast iron In the example, if the setpoint of the pump is 4 bar the speed of the pump is adjusted to deliver 2 bars so the total pressure becomes 4 bars. Start Sizing Nov 20, 2020 · If it's winter where you are and the central heating pump has stopped working, then it's time to take action and do this easy temporary fix to get you warm again. If the Grundfos UPS 15-58 FC heat pump is not operating as expected, you can follow these troubleshooting steps: 1. One way to detect a problem with the circulator pump is to check the radiators and tubing coming from the pump itself. This triggers a notification in the Grundfos GO app, serving as a reliable tool to identify faults in the heating system and ensure comfort for homeowners. Feb 27, 2024 · Check out your vehicle's service manual to find out where to check and the proper procedure for checking it. b. India Korea Mexico Parque Industrial Stiva Aeropuerto Netherlands GRUNDFOS Pumps NZ Ltd. As well as being easier to install and commission compared to older booster systems, Grundfos booster pumps will keep your water pressure at the right level for you. The water in the system is boiling because the pump is undersized. Open pump to reveal electrical internals (as shown in photo) The pump reacts to changing volume flows in the system by changing the speed. Start the pump and check the direction of rotation. May 13, 2020 · Next, check all the fittings on the pump too. Make sure that the ohmmeter reads OL (Open Lead) so that you know that your well pump is powered correctly. date of manufacture. 4. Mar 4, 2021 · See how a Grundfos service specialist dismantle and assemble Grundfos SP pump and find out what the job requires and how it is performed. Shut the valves either side of the pump. Pumps come in a variety of designs and choosing the right one depends on the job you need it to perform. Evaluate and compare pumps in the results list. The different sectio Dedicated videos show you which control modes are used in each pump and help you find the right setting for any heating system to achieve optimal performance. Pumps wear out and need to be replaced. If your pump still doesn’t rotate when turned back on, check the fuse. When I plug in the pump, it hums for about 10 seconds and then goes quiet. Step 4: Fix Ground Connection. Replace the fuse or switch the circuit breaker on accordingly. Air in the pump. In this video we look at circulating pumps used in hot water and heating systems to understand the main parts a Whichever situation you’re in, you can find the pump troubleshooting guide you’re looking for in 3 possible places: Grundfos Product Center; the Grundfos for Engineers Search Engine; and the Grundfos GO Remote app. There are two ways to experience service on Grundfos. Note that when purchasing a Grundfos product online, it is important to check the date of manufacture and the duration of the warranty with the seller as the product might no longer be covered under this Limited Warranty. Reconnect or tighten loose connections. Check the electrical connections – If the circulating pump is not working, it is important to check the electrical connections to ensure they are secure and functioning correctly. You could also add a separate external check (in which case you should remove the pump's internal check. A bypass connection is a pipe connection between the suction and discharge side of a booster set in order to bypass water when the pumps are not in operation. Learn more about MWI’s customizable line of submersible electric pumps here. If the outlet is not providing power, try plugging another device into the same outlet to determine if it’s the source of the problem. The pump is easily installed and secures silent operation. ) Are the below steps valid: Cut mains power to house. That way, when your pumps do need part replacements, you won’t be paying a premium for a quick fix. We pioneer change together. 2c. The pump might produce electric shocks. Defective pump. 2 Scope of delivery The box contains the following items: • 1 Grundfos SCALA pump • 1 quick guide • 1 safety instructions booklet. Hi I have a grundfos Alpha2 L 15-60 130 central heating pump that appears to be dead. Turn off the power to your well pump, hook one wire from your ohmmeter to the ground and the other wire to the colored ground cable. Grundfos' liability under this warranty shall be limited to repairing or Check the three wires are connected to the plug terminals. Our intelligent, durable, all-in-one booster pumps have been designed to maximise efficiency by adapting to your home’s unique demands and needs. Check with manufacturer for information regarding suitability of pumping other liquids. The pump is self-venting. Remedy. There is no need to pre-determine this. Check to see if the fuse has tripped. Sep 6, 2021 · One of the most common reasons that a boiler leaks is issues with the pump. Check the circulator relay - it should be turning on the pump; Check the thermostat terminals at the circulator relay - jumping those should turn on the pump. Start Sizing Hot Water Heating System Circulator Troubleshooting & Repair Guide: we discuss circulator pumps, circulator pump relay switches & controls on heating systems to describe how to tell if a heating circulator pump is working. If any of them are loose or disconnected, your circulator pump won't work. The Grundfos Conlift condensate pump is used to pump condensation water in cooling systems. 2b. Water pressure boosting applications use, for example, pumps from the CR range to ensure steady flow through a common discharge line. Or if you have the product number, you can search by that as well. A Grundfos Energy Check calculates your potential savings and makes suggestions for an efficient, high-performing This could be due to a lack of power, blown fuse, damaged pump, or a control issue. Once you’ve removed the item, you can replace the pump-motor unit, securing it with the four screws. Next, there’s the P2-curve, measuring the relation between a pump’s power consumption and flow. Clearance Corner Stock; Grundfos Sololift2; So, if your pump isn’t working, check the below. So, let’s go to Grundfos Product Center and get started. You can find a direct line to local distributors by selecting the country you are based in and then the office closest to you or, as an Extranet user, you can place your Learn about what a booster pump does, what a booster pump is used for and how to select the right pump in this introduction to domestic water pressure boosting. Get access to courses and learning tracks, track your progress and receive badges and diplomas for your achievements. Remove or not. Sep 25, 2018 · Boiler not working, Checking pump, Radiators cold, No hot water From sizing calculators to mobile apps to personal consulting, Grundfos offers a wide range of resources to help you select and configure the right pump for any kind of job. 3. GRUNDFOS ECADEMY is a free online training tool that helps you stay up to date with Grundfos pumps and services. - Check that the power to the pump is turned on Nov 23, 2010 · Step 2 - Check Radiators and Tubing. Note the pump's control setting on the display. I'm not very knowledgeable about plumbing from a DIY perspective, so I could use some help here. If it’s stiff, turn it several times to loosen it up. the pump is stopped. How to identify it: If your radiators are not heating correctly this could be an indicator of incorrect speed and flow rate The first thing you should do when your Grundfos pump isn’t working is to check the power supply. The pump performance curve - the most fundamental of all centrifugal pump documents – is packed with information that can be used as an aid in selection and specification of the right equipment. If your pump wasn’t turning before, gently try to turn the pump spindle with the screwdriver. Domestic buildings can vary significantly in size – from an apartment of less than 50 m2 to a villa of more than 400 m2; from one- or two-story buildings to apartments in high rises Read more about perfect water pressure boosters. Condensate pump operation explained and troubleshooting common condensate pump problems. O. Ecademy - free online training. If the settings are correct, there might be a problem with the pump or your home's plumbing. ) Find the product you need documentation for; Navigate to the documentation tab; Filter for the documentation needed; You can search for your product here: This is also why the efficiency of a complete pump unit is lower than the efficiency of just of a pump. Turn the fuse back on. GRUNDFOS Gulf Our intelligent, durable, all-in-one booster pumps have been designed to maximise efficiency by adapting to your home’s unique demands and needs. Step 1 Sound Test. You’ll also gain familiarity with both water and oil lubricated turbines. Problem: Incorrect speed and flow rate settings. ve Tic. We are more than just a water pump company. The Fix. Aug 6, 2022 · Checked this morning and found the water heater was working fine. 4. There could be a problem with the impeller. Size your product. Test for source voltage, to determine whether or not the good charge that's leaving the fuse is getting to the pump. used; however, a decrease in pump performance may result due to an increase in the viscosity of the solution. Pumps often develop leaks at joins or flanges points. 1 Service documentation Service documentation is available at www. Discover a range of online engineering, installation and operation tools and up-to-date pump design information that can assist you in your work today, and help you work smarter over the long run. Size, select and compare pumps and pump systems. Pumps are operated in parallel when two or more pumps are connected to a common discharge line and share the same suction conditions. Slowly open the outlet valve until it is completely open. If an "RCD" fault current circuit breaker has been installed in the pump's electrical supply line, it has tripped. See section 6. There is a hot water recirculating pump installed (Grundfos UP 15-10 pump). Liquid Pump Design. Otherwise, it is difficult to know or not as at least my pumps are very quiet, and it isn't a sure thing the pump is running otherwise. Products which are sold but not manufactured by Grundfos are subject to the warranty provided by the manufacturer of said products and not by Circulating pump and heating pumps explained. It is critical when pumping hazardous or expensive fluids that metering is done with a high degree of accuracy and repeatability. 5 watts. Jul 10, 2018 · How to free a jammed central heating pump east step by step tutorial, Another simple DIY video to help save you some money. Check for any air pockets in the pump and bleed the system if necessary. The 4” submersible SPA pump is ideal for basic applications where there is a need for a hard-working, robust pump. When thermostat valves and control valves are opening, the volume flow rises and the pump increases the speed. UPS N is a three-speed circulator pump with a corrosion-resistant stainless-steel pump housing designed for hot-water recirculation. Grundfos offers a complete range of 3” and 4” submersible pumps for domestic groundwater applications – from the basic SP pump to the advanced SQE model. selection. Start Sizing May 5, 2016 · I tried this on two Grundfos pumps, and it worked on both, indicating the pump was running. From our pump selection guide to pump diagrams and specifications, you can easily access all the technical information you need at the Grundfos Product Center. In this section, you will find a step-by-step guide to installing the gateway, performing commissioning (or device activation) in the Grundfos GO app and, finally, checking that the data is received in the platform. Restart the pump by pressing [Reset]. Need to refresh your basic knowledge of how pumps work and are categorised? This course tells you what you need to know. This can be down to incorrect installation, the pump working itself loose, or even a blown seal due to incorrect pressure settings. Grundfos pumps and system stand for the highest quality - and exactly that applies to our repair and analysis centres. The contractor used what looked like a small compass---he held one up to the pump and it wobbled madly. Pump Is Leaking. Products and Services Applications Products A-Z Categories Liquids Aug 11, 2012 · I would like to verify that my Grundfos Selectric UPS 15-50 Pump is operating correctly. I'm having some problems with it now, as it's no longer providing hot water as quickly as it used to. You can type in the product name and press search to find matches. These instructions describe not only installation, operation and maintenance, but also include a dedicated section to assist in troubleshooting general problems that arise during use. Grundfos UPS3 Domestic Heating Pump The Grundfos UPS3 15-50/65 is one of the most popular domestic heating pumps on the market. A corroded pump will need to be replaced. Lastly, check the joint on your pump. Ensure that the pump is properly plugged in and that the outlet is providing power. Again, if an internal fault has occurred, check the pump display, and check for turbine operation and unstable supply voltage. The pump is best employed at depth not Grundfos manufacture. If this is where the leak is coming from, there is a good chance that the seal on the pump has blown. Pumps running in parallel will increase flow (Q), but not head (H). This made sense to me, but I can't reproduce it---my compass won't Whichever situation you’re in, you can find the pump troubleshooting guide you’re looking for in 3 possible places: Grundfos Product Center; the Grundfos for Engineers Search Engine; and the Grundfos GO Remote app. In this course, you’ll learn to identify types and sub-types of vertical turbine pumps and their accessories for deep well applications. Enter the product for which you want to troubleshoot in the search bar at the top. I'd suggest a Grundfos UPS3 15-50/65. This is due to the pressure of the water penetrating the weakest parts of the pump, and also the weight of the pump itself affecting joins and causing holes through which the water can penetrate. The pump is operated by a control panel on top of the unit. See how a Grundfos service specialist finds faults on Grundfos UPM3 pump and find out what the job requires and how it is performed. In this, the first of a two part webinar series on interpretation and use of the pump curve, we will explore fixed speed pumping. Take advantage of the free online training offering and browse our growing library of online courses and learning tracks and get badges and certificates. Sep 22, 2016 · Remove any debris that you find inside. Is the power plug plugged in? Plug the pump into a different socket and check to see whether it works. Only step 11 would still have to be checked. São Bernardo do Campo - SP Bulgaria Canada COLOMBIA GRUNDFOS Pumps Eesti OÜ OY GRUNDFOS Pumput AB GRUNDFOS GMBH GRUNDFOS Hellas A. Choose a specific pump to review in-depth pump information. Read more about perfect water pressure boosters. Removing the pump-motor unit gives you easy access to the item that is clogging the system. To fix this, throttle the pressure-side valves until the noises are eliminated. If you have any questions, please contact the nearest Grundfos company or service workshop. Grundfos impeller pumps are built using a range of technologies, for example with large free passage through the water pump impeller, where this is required. The layouts and operation of these systems will be covered and guidance will be offered for specification, selection, and sizing of the recirculation pumps. Condensation must be removed when it forms on cooling surfaces and in cooling systems. Grundfos' factory or authorized service station, any product of Grundfos' manufacture. If the condensate cannot be drained away from the drip tray by gravity, a condensate pump is fitted. The condensate should be collected in a drip tray. Start Sizing Condensation must be removed when it forms on cooling surfaces and in cooling systems. Each plug terminal has a screw, so loosen the screw so you can insert the wire neatly into the hole. While on the UPSe pump it is displayed by the red LED Possibility in every drop. Jan 4, 2018 · 2: There's supposed to be a check valve in the pump. Apr 12, 2023 · Benefits of Grundfos Heating Circulation Pumps. 1 Operating the product 4. If the issue persists, contact a professional. Thanks to a low noise permanent magnet motor, energy consumption is reduced to as little as 5-8. It use to hum all the time when it was running. Grundfos will not be liable for any costs of removal, installation, transportation, or any other charges Products sold by Grundfos that are manufactured by others are not covered by this warranty. Look for pumps that use non-proprietary bearings and seals. If the pump fails to restart after several tries, it means the system still contains too much air. A hot water recirculation pump keeps a constant flow of water through your pipes, so you no longer have to wait for hot water when turning on the tap. The ground connection must be properly connected to the pump according to local requirements. Grundfos Kenya Service Centre offers a team consisting of very well-skilled staff with years of experience in their special field. Anonymous user 26 July 2023 - 2. Return the pump bleed screw to its correct location. GRUNDFOS Pumps Pty. 117 in 1 electric screw and Next, remove the 4 screws that secure the pump-motor unit. This tutorial offers a comparison of the pumps to facilitate selection. A jockey pump is a small pump connected to a fire sprinkler system to maintain pressure in the sprinkler pipes. Start Sizing Mar 3, 2012 · 1. One notable model in the Grundfos lineup is the CR pump series, designed for high-pressure applications with a range of flow sizes and working pressures. Product introduction 4. Join us in solving the world's water and climate challenges. Ltd. Jan 12, 2012 · This is for direct drive motor only There is a tool. You can find a direct line to local distributors by selecting the country you are based in and then the office closest to you or, as an Extranet user, you can place your Feb 26, 2022 · Set an ohmmeter to match the voltage on your 3-wire submersible well pump. The pumps may be oversized for the system in question. - I'm replacing the circulator pump (bg100) with a UPS15-58FC grundfos 1/25hp which comes with an easy removable integrated check valve. It is important to check it every When air passes through the pump, the ALPHA will detect it and automatically initiate an air venting procedure. Check that the pump is secure. 41 PM. B. The motor has to be pulled from the body of th Size your product. Grundfos Pumps. It is a magnet in a little site glass. This knowledge will enable you to make informed decisions when selecting and specifying variable speed pumps along with their drivers and controls in order to optimize performance and reduce power consumption. Sti. Based on this data, we have everything we need to size and select a system. You could have a bad relay. Grundfos will not be liable for any costs of removal, installation, transportation, or any other charges that may arise in connection with a warranty claim. Although the examples presented refer to water systems, the course is relevant for other applications. If your Grundfos circulation pump is making unusual noises, it may be due to air trapped in the system or a worn-out impeller. We believe that the combined passion and effort of all employees and partners hold close to unlimited potential. Option 1: Use Grundfos Product Center. This is to ensure that if a fire-sprinkler is activated, there will be a pressure drop, which will be sensed by the fire pumps automatic controller, which will cause the fire pump to start. In this webinar we will explore typical applications and installations when a tankless water heater is used in residential buildings. Some state the product doesn't work; I can't report that. Next, there’s the P2-curve, measuring the relation between a pump’s power consumption. Jun 1, 2017 · It is important to check it every so often to ensure the system is functioning proper If you are on a private water system you probably have a pressure tank. Next, remove the 4 screws that secure the pump-motor unit. Grundfos' liability under this warranty shall be limited to repair-ing or replacing at Grundfos' option, without charge, F. Turn off the boiler and make sure there is no power to the pump. Tried to fire up the heating last night to test a radiator, however nothing happened. product-selection. If your pump isn't providing the desired water pressure, check the pump's control settings first. Dive into the Grundfos knowledge-sharing archive with all the latest research an d insights about pump solutions at work. If there is a multi-pump communication fault, you can also get more information on the pump display or by referring to the booklet. Replace the circulating pump – If the circulating pump is found to be faulty, it will need to be replaced. Step 1: Search by product name or number. Products which are sold, but not manufactured by Grundfos, are subject to the warranty provided by the manufacturer of said products and not by Grundfos' warranty Possible cause of fault. station, any product of Grundfos' manufacture. The pump is best employed at depth not exceeding 26 feet. Last but not least, pumps used to boost mains water must be approved for drinking water. Learn how to calculate pump head. Aug 23, 2018 · Tilt the pump from side to side, and listen for any rattling or clanging sounds. However, installing a Grundfos pump has a variety of benefits. Step 2: Evaluate and compare compliant pumps. E. You can get a replacement parts kit for it. Make a not of which direct the pump is pumping by checking the arrow moulded onto the main body of the pump. Vibration isn't a good way to sense if they are running, because the pipes carry vibrations from other pumps. As a Grundfos customer, you deserve efficient, smooth and personalised service – like when placing your pump order. Possible cause of fault. Have the electrical supply line inspected by a specialist company. You will need to: 2a. Grundfos Remote Management; Virtual Technical Service Assistance; Commissioning Laser Alignment Condensation must be removed when it forms on cooling surfaces and in cooling systems. With ECADEMY you can update your knowledge on pumps and pump-related topics. Check for shorted or disconnected thermostat wires. For $20, I'm very happy with the product. A possible isolating valve installed Our new installation has new Grundfos pumps that are very quiet. Dec 3, 2023 · If it’s still leaking and you’ve ruled out the seal and a loose pump, check the pump over to see if any parts have corroded. Apr 27, 2016 · If your pump isn’t working, it could require more than a quick fix. If necessary, turn off the main switch in the consumer unit. If there is evidence of corrosion, this could be the cause of the leak and you will need to get a new central heating pump fitted. UP B is a circulator pump with a bronze pump housing for drinking water applications, while Grundfos UP N has stainless-steel pump housing. Look for how to guides here to find quick and easy guidance and support for all phases of your project. Note If the pump restarts immediately after ithas been stopped, the isolating valve used for checking for correct operation is positioned too close to the PM unit. The function of a recirculating pump is to ensure that hot water is always available as close to the consumption point as possible, in order to reduce water waste and to increase comfort. Was working when I last had the heating on around March. Time for a pump energy audit? The efficiency of a pump can have a huge impact on your life cycle costs. Whichever situation you’re in, you can find the pump troubleshooting guide you’re looking for in 3 possible places: Grundfos Product Center; the Grundfos for Engineers Search Engine; and the Grundfos GO Remote app. (n. A water pressure booster system consists of a pump and a pressure tank. The synergy of these core components makes sure the pump’s functionality across various pump types, including circulator pumps, submersible pumps, and centrifugal pumps. Check the power supply and the pump's control panel which by LID will guide user to determine fault. . The pump’s power consumption determines the size of the electrical installations which must supply the pump with energy. The system is able to determine whether it should be an SQflex or RSI system with an SP pump. Step 3: Choose your desired product. The first pump is the ideal choice based on your sizing criteria and life cycle cost. Check the priming conditions of the pump before attempting to restart the pump. The pump has now been vented and is ready for operation. If no power is making it to the fuel pump, then check the fuel pump relay circuit. How can the use of a bladder tank help you to reduce power consumption and total life cycle costs for your pressure booster pumping system? Size your product. Choice of the right dosing pump can help to assure that the system functions as intended. and flow. If the pump is blocked you can see more information on the pump display and in the booklet. Learn more about UPM3 pum Size your product. Before beginning the following steps, make sure the pump is running. And the type of pump is submersible. It only tells you if the motor is spinning. I've seen a few people suggest removing this altogether from the unit. Comfort is a compact and energy-efficient hot-water recirculation pump designed to deliver instant hot water to all faucets in private homes. grundfos. Check that the product received is in accordance with the order. Check that the voltage and frequency of the product match voltage and frequency of the installation site. Inspect the impeller for any damage or wear and replace if needed. If it’s not, tightening it up can sometimes be enough to stop a water leak. It maintains a consistent temperature throughout your home or building. Consult a professional to diagnose the issue. If it works correctly and has not been removed, it should not backflow. Oct 13, 2016 · Products manufactured by Grundfos Pumps Corporation (Grundfos) are warranted to the original user only to be free of defects in material and workmanship for a period of 24 months from date of installation, but not more than 30 months from date of manufacture. Possible causes of fault. The pump provides reliable and maintenance-free operation. 6. com. Tighten the screw and check the connection is secure. 2. Find the right pump solution for your installation requirements. We also explain the layout, constituent parts and unique attributes of the performance curves of vertical turbine pumps so that you will be able to tell your customers the If the pump is not rotating, it may indicate a failure. As the thermostat tells the pump to circulate the heated, or cooled air, check the tubes to see if they warm up or cool down. You will need to make sure that there is sufficient liquid in the system. Because if it does work, then these instructions are not suitable for your problem. I have already confirmed that it hasn't seized, by manually turning the pump through the air vent hole with a screwdriver. Mar 25, 2023 · Lastly, adjust the pressure with an air compressor if necessary. In this webinar we will explore which parts of the curve apply in identical ways to both fixed and variable speed operation, and the important differences in their use. The Grundfos heating circulation pumps are reliable and efficient and can be installed in your heating system to circulate water. Excessive wear of bearings (rattling). I unplugged the Grundfos pump and was able to get hot water at the faucets after a few minutes so I'm wondering if the pump is not working. Changing to energy-efficient pumps can help you reduce energy costs and CO2 emissions – often with a short pay-back time. We believe that every drop contains infinite possibilities, and that water has the power to change the world. Oct 27, 2014 · Boilers - Home Heating Steam and Hot Water Systems - Check Valve in circulator. 1 Applications Grundfos pumps, type MTH, are multistage centrifugal pumps designed for pumping liquids for Grundfos circulator and in-line single-stage pumps are effective as the main circulator pump in heating and air-conditioning applications. The pump needs to be replaced. Touch the radiator tubes to check if they are getting hotter. Jul 26, 2023 · Grundfos Pump no power light illuminated and not working. On the Alpha pump this is shown as a red eye light and the value E1. This overview will help you better understand the different pump designs and find the one that is right for your system. For boosting mains water, we recommend selecting the Grundfos JET pump & booster, SCALA1 or SCALA2. akyzm hgfyp ieadq zjtu ccwhvqc vznbo vnm uqtylz vwmra hyokwp