A to perform the corresponding repair verification cycles and rechecks. Motor and motor control troubleshooting techniques. The 16 pin plug has all the commands 24 volts to the motor. Theres a microprocessor that receives, interprets and reacts to. Hvac ecm variable speed blower motor troubleshooting. Having done motor work in the past, i pulled the cover off the airhandler to take a look at the blower motor. Nema mg1 specified motor design to meet what was known as class f, g or h insulation, and corona resistant wire was developed. Feb 17, 2018 these videos are all part of our training series on hvacr service, installation, preventative maintenance, general knowledge, and tips. Motor connectors should oriented as to prevent the accumulation of moisture in the control.
This connector provides connection for ecm speed common pin 1, speed output pin 2, blower enable pin 4, cool enable pin 5 and r output pin 6. There is no input power to the motor controller high voltage input. Ecm failure 4 painful symptoms of a bad ecm computer solo. Motor reliability for inverter driven motors motor winding problems the motor winding insulation was changed to withstand the transient voltages and to prevent the corona discharges. If an application requires high efficiency, variable speed, and low noise, a genteq. Signal too low ecm9150 electronic throttle module etm, internal fault. Ecu ecm with code 9150 ecm9150 control valve inlet. Went ahead and installed new motor and unit ran fine. Enginespecific information and data are available from a variety of sources. When its necessary to disconnect the power from the hvac system, its always a good practice to verify that voltage has been disconnected, by using a voltmeter.
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. Commutated motor ecm by automated control systems via a 0 10v input signal common or manually via potentiometer set. Singlephase 120 or 208240 ac power is supplied to the motor module, which. Sep 14, 2012 troubleshooting the ecm motor can be very simple if you just remember that it not just on or off. Ecm motor control connector 16 wires for programming 4 wires for basic control. Ecm standard speed controller all ecm speed controllers are manufactured by price. 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 nec does not permit the use of motor nameplate fla to determine the conductor ampacity. Hello, i have a ge ecm motor in a blower i wish to use as a shopyard fan. The highest rated motor is the 120v motor at 34 flc. Ecm motor troubleshooting part 2 york central tech talk. Called tech support and told them about the old motor. A true ecm motor is a constant cfm motor, meaning the motor uses the torque and rpm to move a constant, lets just say, 800 cfm on pin 1 and cfm on pin 2.
First of all there are two components to an ecm motor the control module and the motor itself. Use wire ties to create a drip loop in the motor cables. If a motor has a 120 vac power cable with a jumper and 240277 vac is supplied to the motor it will be destroyed. Troubleshooting the ecm motor can be very simple if you just remember that it not just on or off. S 120 vac hot n17 120 vac neutral eac electronic air cleaner 120 vac connection. Analysis of field returns show that quite often the ge ecm is misdiagnosed as faulty. Verify proper signals are being received by the motor control board and are being sent to the ecm2 motor by the 16 wire low voltage motor harness. The other motors in the group phase is the 10hp 3phase motor, as indicated by the shaded area. Please comment and ask for videos that you would like to see. This connector provides connection for ecm speed common pin 1, speed output pin 2, blower enable pin 4. Fan will not change speeds or is running at the wrong speed. The ecm motor construction and troubleshoot youtube.
Tested old motor windings just for the hell of it before i installed the new motor. Connectors are keyed to resist the cables being inserted. Therefore, motor troubleshooting involves the entire system, not just the. The motor control is what sets the ecm apart from any other motor. End bell is painted black, and more than 10 wires in the 16 pin connector i found the ecm motor running backwards. Aug 16, 2017 ge ecm 2 3 motor wiring diagram trusted wiring diagrams ge ecm x motor wiring diagram for 8 arcnx co rh arcnx co genteq wiring diagrams 5kcp39bgr201bs ecm blower motor wiring diagram. There are basically 4 problems that will not allow the motor to run. These videos are all part of our training series on hvacr service, installation, preventative maintenance, general knowledge, and tips. This includes air conditioners, heat pumps, and furnaces. Hp color laserjet pro mfp m477 series troubleshooting hp. This evaluation is then used to determine the required rpm necessary to operate the inducer motor during mediumheat prepurge, the first minute of mediumheat mode, and lowheat mode. This connector provides connection for ecm speed common pin 1, speed output pin 2, blower enable pin 4, cool.
Nema mg1 specified motor design to meet what was known as class f, g or h. Now if that is an x ecm motor it is a constant torque motor and not quite as smart. Ge ecm motor wiring diagram free diagram for student. Genteq ecm motor diagnostic tool,for use with ecm motors. Theres a microprocessor that receives, interprets and reacts to sensor inputs as fast as they occur. Dont let this pressure make you take even longer to resolve the problem. This motor tester is for use with only genteq ecm 2. 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. Ge ecm blower motor problems bruce forsberg home page. The genteq brand has earned a reputation as an industry leader of ecm and axial flux motors for over 30 years. For xb models, the errors are grouped into diagnostic trouble codes, which help identifying the faulty device e. When a motor drive goes down, production often grinds to a halt.
Dont automatically assume the ecm motor has failed. Instead, remember the vfd troubleshooting checkpoints. Historic errors are stored in the nonvolatile memory of the ecm until they get cleared with the software. After the second failed attempt, the heater fan motor will remain on for up to three minutes which is normal and part of the logic of the heater. It is a brushless high efficiency dc motor now being manufactured by the regalbeloit corporation.
The perfectspeed, 16pin, ecm variable speed motor easily integrates into noncommunicating. Ecm control the control controls a multiple speed ecm motor through the 6pin p3 connector. Faulty signal ecm9150 throttle unit, potentiometer 1. Ecm motor troubleshooting part 1 york central tech talk.
In this hvac ecm blower motor video, i go over the genteq x wiring. Ge motor installation and maintenance instructions for nema 140 to 500 frame horizontal ac small industrial motors gei 56128h pdf genteq ecm electric motor installation guide for evergreen cm electric motors, previously branded ge ecm motors pdf 2014 genteq, 25 heil quaker blvd. Remove these two bolts from the motor and control assembly while holding the motor in a way that will prevent the motor or control from falling when the bolts are removed. Upgraded ecms, sometimes called brushless permanent magnet bpm motors, contain magnets attached to the rotor and an electronics package to control the torque. If all of that was correct, now we need to see if the problem is in the motor, or in the module. The control boards motor led was flashing, indicating it was telling the motor to run. Reapply power to the furnace and verify that the new motor control module is working properly. Motor tests these tests are no different from taking resistance readings on a 3phase compressor motor. The following is my encounter with a ge aka regal beloit ecm motor used in a trane air conditioner.
Page 14 service facts trouble shooting kit troubleshooting ecm2 motor with troubleshooting circuit board and 4 wire test cable ecm2 troubleshooter kit order pub. Contact the paccar engine support call center for additional assistance in troubleshooting this issue, and for possible repair or replacement of the harness. Gather up any background material you may have on hand and then use your senses to inspect the site. This manual will show you how to setup, program and troubleshoot ecm motors. If the power source is battery voltage, the voltage regulator is located inside the hall sensor. Ge developed the ecm electronically commutated motor a number of years ago. If the motor does not run, unplug the 16 pin wiring harness from the motor fig. The control controls a multiple speed ecm motor through the 6pin p3 connector. Make sure you go through the diagnostic steps completely before replacing the motor. For complete troubleshooting information on the variable. Variable speed blower motor variable speed motor maintains specified air volume from 0 though 0. The rpm is used to evaluate vent system resistance.
Faulty signal ecm9150 throttle unit, internal fault. Disconnect pl and plug it into the ecm motor simulator 3. Ecm by regal beloit, ge commercial motors by regal. I unhooked the 16 pin connector, and hooked up my tec mate to the motor.
This air conditioner is a little over 5 years old and i am already on my second problem. This video is part of the heating and cooling series. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in the driven machinery. If the motor does not run, replace the motor module. If a 120 vac cable is used with jumper and 277 vac is applied to the motor it will be destroyed. And its composed of hardware a pretty standard circuit board thats encoded with software a program that tells the car how to run. They are now being rebranded by the genteq company, a division of regalbeloit. When the system attempts to kick the blower motor on, it jumps, but does not go to the run mode. Any one of you whos ever had the misfortune of working on a carrier, bryant or trane furnace with one of these inducer motors knows what a sweet old bill these can be. Refer to the fault code section of this document for proper troubleshooting. 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. For the first problem i had called an hvac technician out.
Ecm motor shaft turns, but not smoothly if the shaft with blower wheel disconnected is. It can adjust the air flow depending on what the system is getting for feedback. It corrects errors in the fax transmission from bad phone connections. In my previous post, we covered checking the power and communication to the ecm motormodule. Apr 18, 2012 the ecm motor is disassembled and all parts shown. The vehicles ecm wiring diagram is used to map the source of electrical errors within the ecm allowing individuals to correct common electrical. In this hvacr video we go over the troubleshooting of the ecm 3. If youve done numerous repairs on the transmission and replaced your automatic transmission fluid and youre still having problems, the ecm could be at the root of your problems. Ge ecm blower motor problems the following is my encounter with a ge aka regal beloit ecm motor used in a trane air conditioner. Find support and troubleshooting info including software, drivers, and manuals for your. Additional engine systems, components and dynamics are addressed in other sections of this application and installation guide. Variable speed operation is achieved by the use of an ecm electronically commutated motor motor. Diesel engine control systems for caterpillar engines listed on the cover of this section. Fan motor is changing speeds up and down and the fan thermostat is not switching back and forth.
Prime ge ecm motor wiring diagram ecm motor troubleshooting part 1. This allows the oem to vary the motors speed based on system inputs. Put 24 volts to pins 12 and 15 and 24 volt common to pins 1 and 3 at the motor fig. These integrated motordrives are used in the air moving as well as the residential and commercial hvac industries, providing unmatched performance. This is due in large part to the unavailability of effective troubleshooting tools for the ecm motor. Ecm control outputs pin 1 speed common pin 4 blower enable pin 2 speed output pin 5 cool enable pin 3 motor cfm pin 6 r output male quick connect terminals.
The ecm is a computer, and features many of the same parts as the computer you have at home or at work. Need help troubleshooting ecm motor hvac pro forums. Perfectspeed 16pin motor troubleshooting manual climatemaster. Times are approximate, it is more important to understand there are 2 attempts and the process can takes some time. Ecm motor testing testing instruments baker distributing. Looking for genteq ecm motor diagnostic tool,for use with ecm motors 6pfg9. Nov 07, 2014 the ecm doesnt control the transmission on a stick shift, so if youre having problems with your fivespeed, its the transmission.
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