Karl_B
Well-known member
I know a lot members' first instinct is going to be to tell me to buy a new one, but I wouldn't learn anything but how to open my wallet if I did that before I determined the problem. I intend to use this as opportunity to learn a little more about electric motors.
I have an LG LW5014 5,000btu window A/C, and it does produce a bit of coolness. The issue seems to be with the fan. It doesn't like to start spinning at all, but it will with a little push. It doesn't start on its own on either speed, and switching between low and high doesn't seem to do anything but alter the pitch of the hum from the motor. I don't detect a change in fan speed or air flow.
I traced power in to through the switches, and everything checks out fine. I used the capacitor testing function on my multimeter and found the same values printed on the capacitor. This leaves me to believe the motor is bad, but I would prefer to verify this.
There is a diagram on the motor that shows four of the five wires. The last wire is undoubtedly the ground. There is an yellow wire that shows to be run to a capacitor, and it was run to the FAN terminal on the capacitor. Orange was marked as one of the two LINE wires. It is run to the common terminal on the capacitor. The red and black wires are marked as switched from the other LINE, and as black being high and red being low.
With everything hooked up, I get the condition I initially described. I did notice that when I forgot to ground the motor, there was no noise or motion. I checked resistance between the wires with the motor completely disconnected. OL between black and orange, OL between red and orange, and 17 or so ohms between black and red. I admittedly don't understand the start circuit, so I didn't check any resistance there. Is this enough to verify the motor is bad? What should I know from these readings?
I have an LG LW5014 5,000btu window A/C, and it does produce a bit of coolness. The issue seems to be with the fan. It doesn't like to start spinning at all, but it will with a little push. It doesn't start on its own on either speed, and switching between low and high doesn't seem to do anything but alter the pitch of the hum from the motor. I don't detect a change in fan speed or air flow.
I traced power in to through the switches, and everything checks out fine. I used the capacitor testing function on my multimeter and found the same values printed on the capacitor. This leaves me to believe the motor is bad, but I would prefer to verify this.
There is a diagram on the motor that shows four of the five wires. The last wire is undoubtedly the ground. There is an yellow wire that shows to be run to a capacitor, and it was run to the FAN terminal on the capacitor. Orange was marked as one of the two LINE wires. It is run to the common terminal on the capacitor. The red and black wires are marked as switched from the other LINE, and as black being high and red being low.
With everything hooked up, I get the condition I initially described. I did notice that when I forgot to ground the motor, there was no noise or motion. I checked resistance between the wires with the motor completely disconnected. OL between black and orange, OL between red and orange, and 17 or so ohms between black and red. I admittedly don't understand the start circuit, so I didn't check any resistance there. Is this enough to verify the motor is bad? What should I know from these readings?
Thanks for all the help, everyone. I might just see if I can salvage on old Craftsman 1 HP motor now. I was much more willing to destroy a tiny Korean motor than the old American one.