Does anyone know any methods to make an AC motor run … Try moving up to the next larger standard value (.56uFd or even .68uFd, same voltage/safety rating), but be advised the motor may have more vibration with the larger value. Electric motor running backwards Answered I have an electric motor on a large Hobart vertical mixer 80 quart. The blower motor is mounted inside the furnace part while the A/C unit sits on top of the furnace. Test the motor and battery. Electric motor run direction questions and answers: Frequently-asked questions about the cause of & repair for electric motors that run backwards. If the motor has wires already attached, connect the white wire to the positive end of the battery and the black wire to the negative end. DPDT switch. If the AC is on and the blades are static, you know there’s an issue. If the motor does not turn, it's possible that your battery is not sufficiently powerful to run the motor. 2017-11-29 23:40 in General Discussion. T Chap Posts: 4,051. I have a Trane XB1000 AC. Install stickers on the HVAC ducting put it at around 1991. Try a battery with a higher I'm wondering if the initial installer reversed L1 and L2 to get the old motor to spin counter-clockwise. Universal (brush type) most cannot be reversed and run well. I had the same issue after replacing my start-run cap due to capacitor failure. Any idea what to do besides change the motor? I changed the capacitor but it still runs backwards. preferably one with a center OFF position, so you can control the motor like this: Forward, stop and backwards. I know it was running correctly just a couple of weeks ago and no changes have been made to the wiring. I noticed the fan was turning in the wrong direction and pulling air in from the top. In … I know that's possible with DC motors, but I don't know if that was common practice. My first instinct was to just switch the directional jumper on the new motor, but if it's currently hooked up backwards, I don't want to leave it that way. A Double pole a.k.a. A Power supply that suits the specs of the motor (has the voltage and amperage as the manufacturer of the motor recommends). Someone on this site said that the likely problem is that after the run-start capacitor was replaced, the wiring on C and HERM was reversed, causing the condenser fan to spin backwards. Any tricks to make an AC motor run backwards? I noticed today while running the A/C that there wasn't anything coming out of the vents. If the air conditioner is on, you should be able to hear the compressor (the loud humming sound that’s typical of a running air conditioner) and you should be able to see the fan blades turning. It is a Carrier unit probably original to the house. It is an typical AC motor with a belt and pulleys to set speeds. A DC motor. Temporarily attach the motor to a battery to make sure everything is operational. Induction motor: All can be reversed, may take getting into the windings to bring out both leads of the start winding (real messy for the novice). I went down to check the furnace/AC system. I had the brushes replaced and put it back together I have a drill press that I use for tapping parts. That depends on the kind of motor. I had no schematic for the compressor wiring, so I did my best guess. If they pick a value that is optimal for the running torque, the motor will have difficulting starting or run backwards. To reverse the rotation of a single phase electric motor is not as simple as reversing the rotation of a three phase electric motor. They may have picked a value that was a compromise.
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