Operation the variablespeed ecm is a dualvoltage motor. While we agree that a lot of troubleshooting from the oems will state that you should calibrate an ecm to the most current software level, this very rarely resolves the issue. To use ecm tools, find the ecm file in question and drag and drop it over the unecm. The logic is a math equation or algorithm that figures out the ideal airflow for each specific piece of hvac equipment out there and. Jul 22, 2015 the rar archive contains all the files needed to decompress ecm files. Ecm motor troubleshooting part 3 york central tech talk. This allows the oem to vary the motors speed based on system inputs. Ecm programmable, allowing for advanced characteristics that are impossible to create using conventional motor technologies. Issue a command to the ecm to rotate at normal operation speed and confirm that the motor shaft is rotating. Update your caterpillar diesel ecm for increased horsepower and improved fuel efficiency. Troubleshooting ecm motors check low voltage at the motor pins 1c, 12r of sixteen pin connector should always have 24vac voltage at the. Ge ecm blower motor problems bruce forsberg home page.
Heavy truck engine ecm programming diesel laptops blog. If the motor runs its usually pretty obvious based on what it does wither its the module or the motor itself thats bad. Bryan orr founder podcaster dad of 10 bryan orr is a lifelong learner, proud technician and advocate for the hvacr trade. Mismatching the motor or control unit with other unsuitable parts will drastically affect performance tolerance. Brushless ecm motors hvac motors grainger industrial. Disconnect power unit before removing or replacing connectors, or servicing motor. In reader or acrobat, choose file save as and give the pdf file a new name. Try to identify manufacturer, model, and snfor above components. A new motor mount may be required if the old mount is connected to the motor around the bearing resiliant mount, or welded or bolted directly to the motor shell. Ge ecm motor technology and troubleshooting presented by the rlcs engineering product field support. Semi motor fan wont turn off ecm, wire harness detroit 60 series fix the problem mechanical the ecm lab the detroit diesel series. The electronics in the end bell energize the windings one after the other. Check the electrical supply matches the motor nameplate.
The ecm is electronically adjustable with an analog signal sent to the speed controller, or in some cases automatically adjusts itself to conditions. The motor control is what sets the ecm apart from any other motor. Fan motor is changing speeds up and down and the fan thermostat is not switching back and forth. Fan mode a call for fan g is received from the thermostat. Electrical connections in the motor terminal box or starter. Installation and operation manual epic fan volume controller. The ecm motor gray furnaceman furnace troubleshoot and. If the motor still does not start, turn off power and unplug both wiring harnesses from the motor.
Find a convenient place on your hard drive for your ecm needs. Meaning it can be programmed to react to specific conditions. Ge ecm blower motor problems the following is my encounter with a ge aka regal beloit ecm motor used in a trane air conditioner. Troubleshooting the ecm motor can be very simple if you just remember that it not just on or off. Resolving furnace and ac rfiradio frequency interference. Oct 20, 2011 these ecm s are plagued with cheap noisy ball bearings. There is improper or no communication to the motor. Another test you can do is to load test those power and ground wires. Upgraded ecms, sometimes called brushless permanent magnet bpm motors, contain magnets attached to the rotor and an electronics package to control the torque. Ge ecm troubleshooter 4 button wthree position g switch all manufacturers 1.
Genteq ecm motor diagnostic tool,for use with ecm motors. This was the whole brainchild of ge ecm motors to make these units easier to service. There are basically 4 problems that will not allow the motor to run. The 120v ac or 240v ac singlephase power is supplied through the 5pin connector to the motor at all times, even if there is no demand for airflow see figure 2.
This ecm motor tester is not designed to test the ecm inducer motor. Do not use this motor on any twinned furnace or air handler systems. Hello, i have a ge ecm motor in a blower i wish to use as a shopyard fan. This video is part of the heating and cooling series. Ecm motor shaft turns, but not smoothly if the shaft with blower wheel disconnected is difficult to turn with the motor control attached. The parameters include all of the operating maps and customerselected parameters.
If a motor has a 120 vac power cable with a jumper and 240277 vac is supplied to the motor it will be destroyed. Singlephase 120 or 208240 ac power is supplied to the motor module, which. Each features brushless dc ecm electronically commutated operation, along with a permanent magnet rotor and builtin inverter. A constant torque ecm is made up of two parts, the motor and ecm microprocessor, that are both housed in one shell. The measured efficiency of an ecm motor is 7580% at its full rated output. Troubleshooting a brushless dc ecm motor and control.
Oct 02, 2019 ever since nikola tesla invented the modern induction motor we have been struggling with varying the speed of motors in an efficient and reliable way. These motors are designed to be energy efficient, and can be used in residential and light commercial indoor furnaces, air handlers, and package systems. The table on the back of the tecmate pro can be referred to for operation guidelines. Put 24 volts to pins 12 and 15 and 24 volt common to pins 1 and 3 at the motor fig. Do not use this motor to replace any existing ecm other than a direct replacement of an evergreen im. If the motor does not run, unplug the 16 pin wiring harness from the motor fig. There is no input power to the motor controller high voltage input. Sep 14, 2012 ecm motor troubleshooting part 1 posted on september 14, 2012 by yorkcentraltechtalk if you read my last post on what is an ecm motor. The motors operate on 115 volts if installed on furnaces and 230 volts if installed on air handlers. The control initiates action when a thermostat call is received or limit switch opens. However, these motors are easily diagnosed with a basic voltohm meter using the ecm service guide.
Ecm is the initials for electronically commutated motor. Ec motors offer high efficiency and energy conservation. Figure 1 typical motor efficiency f or a 50w motor shaded pole single phase the motor is a th capacitor three phase ecm an ecm is made up of two components. Motor phases are sequentially energized by the electronic. Looking for genteq ecm motor diagnostic tool,for use with ecm motors 6pfg9.
Motor and motor control troubleshooting techniques. This power is what operates the internal electronics and drives the motor. If you have the original source file that the pdf was created from, recreate the pdf. Sep 08, 2008 well, we have been selling air handlers with these in them for quite some time now, but in my 10 years in the trade, i have never had to fix or troubleshoot onr until now. As promised, we will now talk about how to troubleshoot equipment with ecm motors. If the motor does not run, turn off the power to the unit and verify that the power plug and the control plug are firmly and correctly attached to the motor. Increasingly and with short lead times, there are programmable oem replacement motors available to meet the needs of both the technician and end user. Need help troubleshooting ecm motor hvac pro forums. Powered by ecm technology constant airflow variable speed communicated ecm genteq models 2.
Techstream ecu flash reprogramming procedure introduction flash reprogramming allows the ecu software to be updated without replacing the ecu. I was able to figure out that one must jump the 1 and 2 pins on the power connector to have it work properly on 120v with info i found on the net. The ecm system diagnostics the ecm provides a flash code in the dash mounted check engine lamp in the event of malfunction in or of some component of the electronic control system. Custom programming and parameter settings available and emission deletion tuning for offhighway or racing applications. Issue a command to the ecm to stop rotation and confirm that the motor shaft is. To reverse the rotation of a singlephase motor interchange leads on the start winding. Next, open the archive and drag and drop the files into this folder. The ecm motor construction and troubleshoot youtube. The thermostat inputs, and limit switch are continuously monitored. Ecu professional training electronic repair company. Jun 20, 2016 the electronic control module is the brain of the engine and is a common failure of these engines. The motor consists of two components, a dc volt, ball bearing motor. The electronic system consists of the ecm, the engine sensors, and inputs from the application.
The rar archive contains all the files needed to decompress ecm files. Enterprise content management ecm systems and engineering content management engcm systems evolved from the same fundamental requirements to categorizeclassify and index documents on a network for easy retrieval as part of a business workflow process. All ecm motors slight cogging or rocking is inherent to all ecm motors motor is finding its location between stator and rotor and is determining rotation rumbling sound during startup and shutdown system mechanical resonance approx 300400rpm, three. Refer to the fan mode section for the control operation. This will be presented in 3 parts so make sure you dont miss any of them. The software contains parameters that control the engine operation. Ecm motor testers i liked my zebra, but now i just jump 24v to the appropriate pin on the molex at the module. View and download honda civic service manual online. Use bearings other than the nsk 608z that you will probably find. Ecm standard speed controller all ecm speed controllers are manufactured by price. Called tech support and told them about the old motor. Ecm control the control controls a multiple speed ecm motor through the 6pin p3 connector. This connector provides connection for ecm speed common pin 1, speed output pin 2, blower enable pin 4.
Troubleshooting a brushless dc ecm motor and control system. How do i determine if it is the board, the module, or. Confirm the motor being replaced is a direct drive indoor blower motor. To determine the bolt hole diameter needed, measure the diameter of the air inlet. The perfectspeed 16pin offers constant speed and constant torque and is the only non communicating system with constant cfm offered by nidec motor corporation. Gather up any background material you may have on hand and then use your senses to inspect the site. Ecm motor troubleshooting part 1 york central tech talk. This video explains the theory, basic internal components, and operation of electronically commutated motors ecm. Ecm motor troubleshooting part 2 york central tech talk. No matter how urgent the problem and motor failure can cause some very urgent problems always develop a plan of attack before you start repair work. Operating modes standby mode all outputs are off and the control is waiting for a thermostat demand. In this troubleshooting guide, the electronic control module will be referred to as the ecm microprocessor.
Ecm electronically commutated motor in residential and. Went ahead and installed new motor and unit ran fine. The motor itself has 3 identical windings, somewhat like 3 phase. It last 8 years before a fused trace on the control module and two drivers burnt. The blower demonstrator provides instructors with handson training of genteq ecm capabilities and features, and eases troubleshooting and repair. The switch should be placed in the on position and the led light on the switch should illuminate when connected properly to 24 vac. If the motor does not run, replace the motor module. Shop for ecm motor testers at the nations top hvac distributor gemaire in the hand tools category. Fuel savings range from 12 mpg to as much as 3 mpg.
They told me they had had a few problems with loose connections in the motor plug. This air conditioner is a little over 5 years old and i am already on my second problem. Ecm motor speed is determined by the 0 to 10 vdc control signal as shown in figure 1 below ecm motor alarm is set at 2000 ppm ecm motor control signal pwm frequency is 2. Refer to the wiring diagram to verify the motor is wired correctly. The control controls a multiple speed ecm motor through the 6pin p3 connector. To prevent permanent damage to the unit, do not apply 240 vac to the motor with the jumper in positions 1 and 2. This reacts with the permanent magnet in the rotor to produce the rotation. Lennox field service diagnosed and fixed lg compressor motor issue. The status output of the h6ecm series product should be closed conductivity exists between terminals. They will adjust their rpm in an attempt to deliver the cfm that is programmed by the installing technician.
Fan will not change speeds or is running at the wrong speed. Do not strike the motor shaft with a hammer or other tool as. This connector provides connection for ecm speed common pin 1, speed output pin 2, blower enable. Apr 18, 2012 the ecm motor is disassembled and all parts shown. Kodi archive and support file vintage software community software apk msdos cdrom software cdrom software library console living room software sites tucows software library shareware cdroms software capsules compilation cdrom images zx spectrum doom level cd. If the motor problems cant be resolved with this list, please contact your supplier for assistance. Then, turn the unit power back on and wait up to 20 seconds for the motor to start. At that time a failure diagnostic code will be entered and stored in the. For more complete troubleshooting of the pwm furnace blowers and inducer motors, the factory recommends testing with both the ecm motor simulator kit kgasd0201fms along with the ecm motor tester. I did get it working by providing the voltage to the green and white wires.
Why the need for all the extensive troubleshooting and motor disassembly to determine which half is bad if either part is not available individually. The ge ecm motor, currently used by most residential hvac systems is a brushless dc, three phase motor with a permanent magnet rotor. Singlephase 120 or 208240 ac power is supplied to the motor module, which converts that voltage to three phase dc voltage. To replace them you have to desolder the motor winding and one anchor point. With the oem connector disconnected at the ecm, jump power one at a time from pin 4 and 6, through a headlight bulb, then ground the headlight to make it come it on. About the perfectspeed 16pin motor the perfectspeed, 16pin, ecm variable speed motor easily integrates into noncommunicating systems through a state of the art interface. Can someone tell me how to go about troubleshooting these things. Ecm motor troubleshooting manual 3 ecm motor trobsootin ecm motor power cable 240277 vac black hot wire 240277 vac white neutral wire green earth ground wire note. Symptom causeprocedure motor rocks slightly when starting this is normal startup for ecm motor won. Wait at least 5 minutes after disconnecting power before opening motor. Electronically commutated motors are comprised of a brushless permanent magnet bpm motor integrated with an electronic control. Ecu book, ecu repair, ecu repair manual, ecu mapping, ecu tuning training, winols training, ecu block diagrams, edc17 repair manual, ecu repair training, ecu immo off services, airbag clear services, egr remove services, dpf remove services, dtc remo.
The controller then sequentially energizes the three motor phases at the appropriate time for optimum operation. When the ecm detects a problem the check engine light will come on, or is activated. The trouble in the hvac industry is that there are several different types of technologies in play and they can easily get confused. Watch this video to gain the information to go over basic troubleshooting and programming of the ecm. An addition to ecm motor construction and troubleshoot showing a repair that can be done to the ecm end bell as shown by local701. The diagnosis of ecm and x motors is actually pretty easy if you do a bit of reading and take a practical process of elimination approach.
Motor and control unit are assembled and calibrated as a set. Caterpillar diesel ecm upgrade save up to 3 miles per gallon. Tested old motor windings just for the hell of it before i installed the new motor. If a 120 vac cable is used with jumper and 277 vac is applied to the motor it will be destroyed. The ecm, or electronically commutated motor, is a smart motor. The software updates from manufacturers such as cummins clearly tell you what the bug fixes are.
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