RV AC, how to wire fan (blower) motor to capacitor.
Need wiring instructions for capacitor to the ac fan motor. Previous owner straight wired to avoid replacing a bad part, now I don't know how to rewire the Fan correctly.
Fan has three speed but I only use two for the AC. Fan wires, White and Brown Power, Red Low, Yellow Medium, Black High: the capacitor has Power supply, HERM (compressor) has three posts, and Fan only has two connectors.
I think the Brown fan wire should be wired with Herm, so it only runs when the AC is running, and the Red / Black (Low/High) should be conected to Fan terminals. Help, it's getting hot here.
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Re: RV AC, how to wire fan (blower) motor to capacitor.
You almost have it Look closer at the run capacitor. It has Herm, this is for the compressor, Com or C and F or Fan.
1 of your power wires is the fan speed so connect them accordingly usually black is hi, blue med, & red is low. You are "feeding" voltage to the selector switch on 1 side and coming out to the fan motor speeds.
Next you have a "Common" wire on your fan motor (this means its Common to all the other connections inside the fan motor to me. It is usually white. Connect this to the other line of power usually the Com on the capacitor unless it connects to a strip on the selector switch. But 1 of these 2 places will be the other side of your Power when plugged in. Lastly the brown it is usually the fan capicator only wire and it will connect to the fan "F" terminal on the capicator this terminal will not have any other wires connected to it.
This should make you a happy camper. Please rate me accordingly and good luck.
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Turn the electricity to the air conditioning unit off at the service disconnect box. Follow the wires from the AC unit to the disconnect box, usually located next to the unit. Open the disconnect box and, depending on the type, either pull the buss-bar or flip the disconnect switch.
Open the air handler\'s access panels with the correct size of nut driver, usually 5/16- or 1/4-inch. Save the screws.
Remove the control panel\'s cover, if equipped, with a nut driver. Some models have a flat metal cover over the electronic controls, and some control panels butt up to the unit\'s access cover. Save the screws and access cover.
Follow the wires from the blower motor. Two wires will go to a capacitor located on the blower\'s housing. The rest of the wires will go to the control panel.
Cut the wires leading into the control panel with wire cutters. Leave the cut wires connected inside of the control panel.
Remove the retaining bolts with either a nut driver, usually 3/8-inch, or an adjustable wrench. The retaining bolts, found on the mounting brackets that the blower\'s housing slides on, keep the blower\'s housing locked into position. Save the bolts.
Slide the blower motor\'s housing out of the AC unit. The housing will slide straight out along the mounting brackets.
Disconnect the two wires going to the capacitor. They will pull straight off the capacitor\'s terminals.
Unscrew the squirrel cage\'s locking-screw with an adjustable wrench. The squirrel cage, the bladed wheel, connects to the blower motor\'s shaft inside of the housing. The locking screw holds the squirrel cage to the shaft.
Unscrew the blower motor\'s mounting screws with either a nut driver, usually 3/8-inch, or an adjustable wrench. These screws hold the motor to the housing and are found on the opposite side of the squirrel cage, the same side that the wires leave the motor.
Pull the motor from the housing. A drop of oil on the shaft will aid in removal. If the squirrel cage sticks to the shaft, then hold the shaft still with an adjustable wrench while spinning the squirrel cage on the shaft.
Slide the new blower motor into the housing. The blower motor\'s shaft will slide into the squirrel cage\'s hole.
Tighten the blower motor\'s mounting screws.
Spin the blower motor\'s shaft until the flat part of the shaft lines up with the squirrel cage\'s locking screw. Move the squirrel cage in or out until it does not touch the housing or the blower motor. Tighten the locking screw.
Connect the blower motor\'s capacitor wires, usually brown or brown with white stripes, to the capacitor. Direct replacement motors use the same color-coded wires as the original.
Slide the blower motor\'s housing into the AC unit along the mounting brackets. Install the mounting bracket\'s retaining bolts.
Connect the new blower motor\'s wires in the control panel one at a time. Disconnect one old wire in the control panel. Determine its color and connect the new wire, of the same color, to its place. Do this for all wires.
Replace the control panel\'s cover, if equipped, and the unit\'s access cover. Turn on the power to the unit at the disconnect box and test the blower motor.
I'm going to start from the beginning. The blower motor gets power from the high blower relay and it is grounded thru the fan switch and the resistor. So you should have power on the pink white blower wire coming from the high relay to the blower motor. The orange black wire from the motor is ground going to the resistor and fan switch. The blue wires on the control panel are for the ac compressor. The high blower relay gets power from fuse number 5 in the box. The blower motor is grounded thru the resistor and then thru the fan switch. Photo courtesy of AutoZone.com
ITS CALLED SURGERY take picture as ya go and have a big bucket for screws. make sure you have your motor and capacitor tested first before you replace it unless you know its bad (hp,sf &rpm must match !!!! on new motor ) little guys are real expensive and are a three speed motor and must be hooked up right or you will burn it UP !
do this in the shade cuz it aint no fun in the hot sun(me Florida) the first thing i would do is oil the motor then have the capacitor checked , the motor may not need to be replaced just serviced ?.. hay now if'n i was any help write a review of thanks or just VOTE,, MOTORWIZJ ..FL
My sheet shows part # 3100248.420 as fan run capacitor.You may have an updated number. Check voltage outputs labeled on it are same as on old one, and double check wiring is correct, to and from capacitor. Be careful not to mistake compressor start capacitor as well. By sounds of number, it's probably the right one.
The two brown wires go to the fans capacitor. The capacitor should always be changed with the fan motor.
It sounds like your unit has a dual capacitor. One side for the fan and the other for the compressor. All you will be doing (After rewiring the compressor wires as they were originally.) is abandoning the fan side of the capacitor, and wiring your new capacitor to the brown and brown with stripe wires. It does not matter which terminals the brown wires go on.
sounds as if your blower motor in high speed has the windings going out. You need to check to see what the amps the motor is pulling to see if the blower motor is going out. It is also possible theat you may just need a blower motor capacitor. To check the amps you need an amp meter and taking the black wire coming from the motor and place the amp clip around this wire and start the a/c this will give you the amp pull and compare this with the amps the motor is specified for. If the amp being pulled is higher than what the motor is designed for then the motor is going out and not giving you the proper rpms in order for the unit to operate effeciently. Also to check for the capacitor you'll need a capacitor meter and follow the instructions. I would check the capacitor first before the motor in the event the capacitor is bad it will not all the motor to achieve the proper rpms.. Also it is easier to change out than a motor. Good Luck