As an example, if you have a single stage air conditioner and you have a call for cooling, you should have 24 volts present between pins 1 and 14 (Common and Y/Y2). ECM/ICM motors connect directly to the AC Line Voltage. Troubleshooting ECM Motors Check LOW VOLTAGE at the motor Pins 1(C), 12(R) of sixteen pin connector SHOULD ALWAYS HAVE ~24VAC VOLTAGE AT THE MOTOR If not, check for voltage at circuit board ECM Motor shaft turns, but not smoothly Help please. Nov 30, 2020. A Constant Torque ECM is made up of two parts, the motor and ECM Microprocessor, that are both housed in one shell. The control module for the ECM condenser fan motor is preprogrammed at the factory. It last 8 years before a fused trace on the control module and two drivers burnt. Troubleshooting the ECM motor can be very simple if you just remember that it not just ON or OFF. 1 page 8 Before troubleshooting the ECM motor, check these system basics: Confirm that the correct thermostat input and ONLY the correct input voltage is present at the interface or main control board on the furnace/ air handler. You’ll … These motor and blowers are used in the air moving, residential, and commercial HVAC industries, providing unmatched performance. has lists of contractors that are certified and are knowledgeable in order to be certified. To conduct the tests, break the motor connections and test first in one direction (the motor) and then in the other (the supply). The ECM condenser fan motor connects to an electronic control module. If you do, the problem is in the harness. Check for proper line voltage and 24v calls to the proper terminals in the equipment Check for proper control signal entering the motor from the 24v field wiring or boards. HVACNUT Member Posts: 3,659. I called our supplier and we both figured the motor control was bad. The 16-pin connector and the 5-pin connector should be plugged back into the motor. ECM Motor Troubleshooting – Part 1 ... As you know from past postings, air flow is critical to proper operation, but, the use of ECM motor technology, also help raise efficiencies of the equipment. ECM 2.3 has a 16-pin control wiring harness running from the board to the motor. ECM Motor replacement list price is 2000 dollars and 240 dollars labour. Enter your email address to subscribe to this blog and receive notifications of new posts by email. ← ECM Motor Troubleshooting – Part 1. The motor controller (module) has failed. Thank you for the reply. That’s when I googled and found your site. This is verified by reading from pin 3 (ground) and the unit chassis. Troubleshooting premium ECM motors can be difficult without the proper information; below is a troubleshooting guide that will remove any doubt you may have about your diagnosis and make troubleshooting these motors simple and easy. Keep in mind, that nearly 40% of all ECM motors returned under warranty have nothing wrong with them, they were mis-diagnosed. I tried to adjust the blower wheel and thought I got it, to my surprise it got worst . Troubleshooting the module requires the same proceedure as pulling the vehicle's fault codes. The control controls a multiple speed ECM motor through the 6-pin P3 connector. They will adjust their RPM in an attempt to deliver the CFM that is programmed by the installing technician. - wait until delay time complete. %PDF-1.5 Then remove the 5 pin connector from the module. Some of the electric motor troubleshooting suggestions in this list are adapted from and can be found at the Betta-Flo Jet Pump Installation Manual from the National Pump Co. Also … Go to Chart # 1, Step # 5. When they bought them out, they stopped making that motor. The connector plug is polarized, verify and reverify correct connector orientation before applying power. Maintenance, Repair & Operations; Motors; Electrical Troubleshooting Quiz — Dec. 1, 2020. Loose or broken low-voltage wires are also potential problem areas and can cause intermittent problems. There is a huge amount of potential energy savings to be had from controlling motor speed. Create New Wish List; Description; Specifications ; REPAIR KIT INCLUDES 1 OVER-CURRENT PROTECTION DEVICE AND CIRCUIT BOARD MOUNT RELEASER. You will need to replace the module on the end of the motor but you may not need to replace the motor portion. <>>> Reed Hamm and Bryan Evans. The fan speed selections and programming will vary by … However in the hands of an expert, most electric motors can indeed be repaired. 0. endobj As promised, we will now talk about how to troubleshoot equipment with ECM motors. Installed new motor control. Everything you need to know about motors and motor controls, including selection, installation, operation, maintenance, performance, repair, and standards endobj Every Electronic Control Module (ECM) (also known as an Electronic Control Unit or ECU), has many factors specific to it that determines whether your part can be rebuilt. Mark Lamendola. You should check with your manufacturer to see if it is still under warranty! November 1. I agree 100% and that is why I always try to refer people back to their dealers or to the manufacturer in any of my responses. ( Log Out / The 120VAC or 240VAC single phase power is supplied through the 5-pin connector to the motor at all times, even if there is no demand for airflow. Attached at the end of this post is a sheet you can use to help record your voltages on the pins while you’re laying on the floor in the blower compartment trying to check out the motor/module. Repairs many GE (Regal-Beloit) ECM Motor Modules that have been Damaged by Voltage Problems and Power Surges. Once you know what mode of operation you are in, you can now see if the board or control is sending out the proper communications to the motor module. “24 volts” between 15 and common. ECM 2.0 ECM 2.3/2.5 ECM 3.0 The three main benefits of this motor over conventional induction motors (PSC) … There is some blue-green residue at the bottom of the individual pin#5 receptacle “well” and also on pin #8 and #16. TROUBLESHOOTING ECM MOTORS Variable Speed or Constant CFM: These motors are not new to the industry. The end user should always try to go back to his original installer for service. Apologies for inappropriate post. WARNING: If a 120 VAC cable is used (with jumper) and 277 VAC is applied to the motor it will be destroyed. Fan will not change speeds or is running at the wrong speed. Kim is an industrial engineer (IE ) and is counting on you to sort out several mysteries that he believes are electrical in … Basics troubleshooting tips for combating motor vibration. I don’t believe is the motor. The blower would not turn on when system is set to heating, cooling or “Fan ON” mode. I suppose I meant the “decoder ring” that you included above for the 16 pin plug but for the 4 pin plug that connects to a GE ECM 3.0 motor module (Regal Beloit). Since the early 1990ʼs most manufacturers have used the GE ECM by Regal-Beloit motor in their variable speed products. Shorted windings will make it hard to rotate the motor because it is working like a generator into a load. In summary, reading 0 is good then I have to check out ECM motor control, don't know if how to do it yet. Function Troubleshooting ECM Motors; View All Help us improve our Technical Specs This easy-to-use GENTEQ TEC INspect ECM motor diagnostic tool saves time by allowing you to identify if your motor has suffered a motor control failure. <> This shopping feature will continue to load items when the Enter key is pressed. ECM 3.0 is a communicating motor that consists of four (4) control wires connecting the board to the motor. There are many different types of electric motors and configurations, but there are three types used mainly in HVAC and refrigeration applications: shaded pole (induction), permanent split capacitors (brushed DC), and electronically commutated motors. It allows for ON/OFF and 0-100% speed control of any ECM motor … 3. Use Chart # 2. It holds the logic that controls the motor. Troubleshooting the ECM motor can be very simple if you just remember that it not just ON or OFF. Fan motor will not run. By this, I mean, what is the thermostat calling for — heat (1st or 2nd stage), cool (first or second stage), fan only, heat pump cooling, dehumidification (reduced blower speed), etc? So let’s take each problem and see how to check that out. Also, N.A.T.E. Shop All Modules. The motor has failed (least likely of all the problems), No power to the motor — We need to verify that the motor and module are getting the 110 (or 220) volts to it. ECM motors used in “standard” equipment operate in “thermostat mode” meaning that 24 volts is sent to various pins on the 16 pin harness plug based on the system mode of operation. Because the causes of machine vibration are so numerous, the underlying problem is often difficult to isolate. Hopefully, these checks will aid you in properly diagnosing ECM motor problems. November 1. Do you happen to have a data sheet with required voltages for the 4 pin 3.0 ECM? ECM Service Troubleshooting • If the motor is running • Noisy operation, limit or safety faults, frozen coils • Motor may not be the problem • Check airflow settings with HVAC OEM guide • Check for dirt load on air distribution system components • Check for closed dampers, registers and grilles • Measure total external static pressure (ESP) • Make repairs if total ESP is above HVAC OEM recommended • If the motor is … The control is powered continuously to insure reliable start-up. ECM Motor Troubleshooting Checklist Problem … Got a motor down? when a faulty controller more than likely is the problem, if you read part 3 of my posts on ECM, we recommend the use of the TECMATE PRO to determine if the motor/module is bad. About the PerfectSpeed® 16-Pin Motor The PerfectSpeed® , 16-Pin, ECM Variable Speed Motor easily integrates into non-communicating systems through a state of the art interface. Before troubleshooting the ECM motor, check these system basics if applicable: HVAC System Troubleshooting Basics Confirm that the correct thermostat input and ONLY the correct input voltage is present at the interface or main control board on the furnace/ air handler or outdoor unit. The plug must be connected all the way and locked into place to prevent arcing. the 4 pin ECM was made by A.O.SMITH. The next step is to verify that we are getting. York did make an analyzer that had an adapter to work on the 4-pin motor. The brand name for this motor is the Think Tank which covers models ECM 2.0, 2.3, 2.5 and 3.0. The motors operate on 115 volts if installed on furnaces and 230 volts if installed on air handlers. As far as the leak, he needs a functioning motor to properly charge the unit. 3. For the … The PerfectSpeed® 16-Pin offers constant Speed and constant Torque and is the only non communicating system with Constant CFM offered by Nidec Motor Corporation. endobj How to troubleshoot ecm motor. ECM is the initials for Electronically Commutated Motor. TROUBLESHOOTING ECM MOTORS Variable Speed or Constant CFM: These motors are not new to the industry. The keyed connectors must be inserted properly and securely until they click. WHAT PINS SHOULD HAVE 24 VOLTS ON FAN ONLY, pin 15 is G pins 1,3,or 8 are common. Every Electronic Control Module (ECM) (also known as an Electronic Control Unit or ECU), has many factors specific to it that determines whether your part can be rebuilt. So, how do you know which pin to choose if you are checking for proper communications? Join Date: Oct 2009. ECM Basics. Thanks. My tech said we need to change the motor and module. Thanks for your response. ECM 2.3 has a 16-pin control wiring harness running from the board to the motor. You should read 0 resistance with an ohm meter. Big fingers or little keys. ‹ For the heating and/or cooling systems, use the manufacturers guide to … I am trying to determine why a GE 2.3 ECM motor failed on a Carrier furnace. Go to Chart # 1, Step # 5. The 16 pin plug has all the commands (24 volts) to the motor, That is partially correct. Went … … I made my customer very happy and I being very honest . If you don’t, the problem is in the board. I have been troubleshooting my intermittent problem for about a month. Find Out if Your ECM Can Be Rebuilt. That sounds simple, kind of in the same way an engine itself sounds simple if you break it down into really basic terms. A faulty ECM disallows your engine from knowing how much fuel to burn in the combustion process. Next. An X-13 is a one piece assembly. Runs for 5 mins and then shuts off. This reacts with the permanent magnet in the rotor to produce the rotation. DO NOT insert contactors in series with the ECM/ICM Mo-tor AC Line. Use Chart # 1. My problem is furnace blower didn't run from last week after a thunderstorm. ( Log Out / Loose or broken low- voltage wires are also potential problem areas and can cause intermittent problems. Being honest the word of mouth became my business card. John says: September 12, 2014 at 10:38 pm. You could check their web site for support. ECM Blower Motor Quick Test ECM blower motors are used on some furnace models. the resistance that is felt could be due to a problem in the board. ECM TROUBLESHOOTING 19 A. This document focuses on ECM 2.3 and 3.0. Variable Speed ECM Condenser Fan Motors - Troubleshooting Tips. ",#(7),01444'9=82. 0. In fact, they’ve been around for quite some time. ECM motors are dual voltage motors capable of operating in 120 or 240VAC systems. If you’re replacing or servicing equipment with an ECM, and the TESP exceeds rated capacity, be sure to look up motor amp draw in the manufacturer’s specifications. My Ecm motor turns on at a delay. Fan motor is changing speeds up and down and the fan thermostat is not switching back and forth. Car Not Starting. Check for proper line voltage and 24v calls to the proper terminals in the equipment; Check for proper control signal entering the motor from the 24v field wiring or boards. Nov 22, 2011. Thanks for the great information. don’t be quick in condemning a motor. Most of it is very common practices you would follow with any motor. 6 0 obj - Is fan in delay mode? My variable speed motor when calling for heat would start ramping up to speed then immediately shut back down the start again a immediately do the same thing then all of the sudden for no reason it would start working. I’m confused … and how to distinguish pin 1 from pin 5 .. Ordered new motor. Dairon421 Member Posts: 21. If you do not have 24 volts there, check the harness, check the connection at the board. Here is the “decoder ring” for the plug: Note the “indexing tab” on the right side middle. Some of these codes pertain to the ECM itself. This reacts with the permanent magnet in the rotor to produce the rotation. Many of the responses posted here are from do it yourselfers, and not technicians. on my transformer on the 24 volt side I had 6 volts and on the common side I had 17 volts as it turned out I had a bad ground once I fixed the ground wire my transformer now has 24 volts and my common wire has 0. DO NOT apply voltage to … The motor has two plugs (fig. In fact the pin broke off and is stuck on the corresponding connector plug of the wiring harness. Sign in Register 0 Cart. Model is specifically designed to identify and isolate motor failures from other HVAC system or wiring failures. As well there is a leak in the evaporater and my tech said he won’t fix the leak until the he fixed the blower. Attached Images #6 08-06-17, 05:56 PM Houston204. I ran across a ecm motor today that gave me the flux. 1). Variable Speed ECM Blower Motors. If you find a phase-on-phase short, the motor needs evaluation for a rewind or for replacement. HVACNUT Member Posts: 3,659. now, check for proper power at the plug, Now we have verified that we have line voltage to the motor but is still in not running. Both … With this sort of an illustrative manual, you will be able to troubleshoot, stop, and full your projects with ease. Rating Required. First, disconnect power to the system.
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