Chamberlin Liftmaster LA400 Gate Opener Repair: Part 2
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- Опубліковано 12 тра 2019
- Here is Part 2 of the Chamberlin Liftmaster LA400 Residential Gate Operator. In this video, I show the replacement and setup of the new control board.
I hope this short series helps for the owners of this system.
If you like what you see, make sure to Like, Share, Subscribe and hit that notification bell so you can see me fix a variety of things!
Tools used in this video:
General hand tools
Fluke 88v Digital Multimeter www.fluke.com
Thanks for video 1 & 2 for the LA400. Using your info I inspected every part of our gate when it quit working. Ended up being 2 things- batteries were long overdue to be changed out. But the major problem was the contacts with the battery harnesses to the board. Loose, and the clips were broken. I’ve done a temp fix, but harnesses willing need to be changed out.
Thanks again!
Glad they helped!
You did an excellent job on these two videos!
Thank you!
Thanks for the video. It has been very helpful.
I'm glad it was useful! Thanks for checking it out!
Another helpful video. Thanks very much.
Thank you! Glad it was of use!
Thank you for this video. Very helpful in 2020.
Glad it was helpful!
Thanks so much. Made it easy for me and saved me $400.
Your welcome!
Excellent videos! I just bought a house with one similar to this, except it's solar. The owner said it quit working. Now I know how to fix it! I think...
Glad it helped
Mine is a LA412 which is the solar version. I found one bad battery and a blown 20 amp fuse. Replaced both and it’s working.
@@terryjones8360 Awesome! Glad you found the problem!
This is a great help! Thank you so much!
I also have an LA 400 and I just replaced the batteries for the third time since I’ve had it. But this time I continue to have a problem with this gate opener and I was hoping you might be able to put your finger on what the problem is. Today, when I went out to open the gate, I heard three beeps, and the gate would not move. I hit the reset button and still nothing. It was only when I pulled out the 20 amp fuse and put it back in that the gate would operate. But even then, when I pressed it a second time, I heard the three beeps. I put a multimeter on the transformer and it goes up to 24 and then bounces around but 24 seems to be the full trickle charge.
I would try relearning the limits and see if that helps
Turns out I had a bad wiring harness from battery to the board, a bad battery and a transformer that wasn’t charging.
@crownmoldingbyspectaculart941 Sounds like you had a multitude of issues...glad you got it fixed
Loved the video learn some ,my gate led is blinking 5 times ,book says rpm on first video you put arm together. And said that you would check the rpm wire , I probably missed it how do you individually test the rpm, then do you have to resetlimits I thank you for knowledge
The board is basically looking for an RPM signal. There is no real spec as to what speed it's supposed to be, but the signal generated should be an AC current. It takes three wire to do that. Power, ground, and signal return. The voltage returned to the board is how it determines the RPM. If the motor is weak, it will set that code.
Very helpful video thanks! I have a question for you. I have to replace my batteries for the very first time. I just ordered them, and my question is. Do I have to disconnect that board all the way before I replace the 2 batteries? Or can I just leave it connected pull it down some replace the batteries and put it back?
If it is anything like my set up, yes. I didn't have near enough wire and I didn't wasnt to take a chance on a short circuit....Also, mine was on a plastic board holder that made it real easy just to unplug the blocks, undo the four screws a little, slide it up and out...
Very helpful! My question is if you have power to the board but no power to the accessory is it a board issue?
More than likely. I have found these boards are very prone to failing from EMI or voltage spikes. They require a dedicated power supply or solar power
Hi, thanks for the video! Can we upgrade this blue board LA400 with the new one, red LA400?
Really not sure. I know the blue board was specific to my actuator arm. The red may have different controls. I would call Liftmaster and ask them. They have great customer service. At least they did the last time I spoke to them....lol
Hi Mr. Irocin Z,
Where did you buy the 36v output adapter (and the rest parts) which I was not able to find on either Amazon, eBay, & Frys.
Thank you
Gatehousesupplies.com if I remember right...
Hey buddy - I am trying to figure out my gate which is same model as yours. When I test the voltage on green and white I get 9 volts but when I test on white yellow or blue it is 0. Does that mean the circuit board is bad? Thanks for your help! Appreciate your video it has made me infinitely more knowledgeable.
Hey Ironcin Z. Great video. Well done. Quick question on the learning button on the logic board. I have a LA400 like yours and the learning remote button no longer lights up when you press it to train a new remote. Is that something you can replace or do you have to get a new logic board? Tried Liftmaster's online support but they said they no longer support residential gates. Any help or guidance is most appreciated.
Usually, it just takes making sure the switch for save is not on. I think there is a limit to how many remotes you can program, but I never have reached that point before Mother Nature takes out another board and I have to replace it....lol
Thanks for the video! I’m trying to replace a remote keypad. What color do I need to program it to?
Great stuff. Can you show how to replace the batteries? Pretty straightforward?
Very straight forward. I do believe I show it in one of my videos
I just replaced the new LA 400 board, but the learning button does not lit when I pressed for learning process so what I should do? I got the defective board?
Thank you for a help
Make sure your power LED is lit on the bottom. If it is, I'd say you have a defective board...
Thank you so much for this video, super helpful. Quick question: when I test the accessory power on the left side of the board (like you do at 3'09''), shouldn't I disconnect the transformer first? I have ~33V when the transformer is connected, but only 10V when I disconnect it. Thanks!
You should have at least 23.5 volts with it disconnected. If you only have 10 volts, I suspect one or both of your batteries are toast. Disconnect your battery terminal leads from the board and test the batteries by themselves. Fully charged, they should be around 12.5 or more each.
Hey Irocin Z, thanks for the vids very helpful ! I need some advice. My LA400 keeps throwing error code 93. There is No obstruction. I have replaced the board and the arm but I still get code 93. What should I check next ?
More than likely, you will need to relearn the limits. If not, it thinks there is always an obstruction. Also check the force setting and make sure it's not too sensitive....
@@IrocinZ Thanks, I'll give it another shot.
Any luck with a solution? I’m getting the same error 93. I opened the case and operate it manually and still got the error. I’m thinking the motor is giving out?!
Are you experienced with Linear Pro? Hi, I got a card for dual opener and I would like to use it in a dual Sliding gate. The cable from card to motor is 5 lead inside. 2 of them for motor: I guess the other 3 are move detector sensor. Do you know what sensor type and connection they are?
I am not familiar with that system. Sorry...
My antenna no longer works. I could previously be 70-80 ft away, but I now need to be 5-6 ft away and in direct line of sight to the control box. The antenna coax connection is secure and not corroded. Any tips? Will I need to replace the motherboard? I debated replacing the antenna, but isn’t it just a piece of wire? (Can’t imagine it failing.)
I dont know it you can buy the antenna module separately, but it does come off the board. You also can try putting the antenna directly on top of the box. I had the same issue with mine when we bought the place. Now its the transmitters. We use the Chamberlin 3 buttons and it seems like they don't always send the signal out. The Liftmaster brand works perfect. But they won't work my door opener...lol.
Problem solved! I replaced the top antenna with an aftermarket one I found on Amazon for $10. It now works. I probably should have tried removing and reseating the original antenna from the top of the box before replacing, but oh well. It works great again. Link below.
Antenna with Coaxial Connection F Connector for use with Gate receiver 8" long and a protective rubber, Silver, 8 Inch www.amazon.com/dp/B00IJ2TRO6/ref=cm_sw_r_cp_api_i_0RWjFbAGEN6WZ
@@jimcooley9477 👌 Nice!
Hi Mr. Irocin Z,
I replaced new board, gear, motor, & relayed assembly set, but the motion is pretty slow & it does not have full open & full close like what you did; even though , I set force button @ maximum speed as well as the time so please advice
Thank you
The force you don't want to set more than half. If you were to put your foot in the path, the gate should just tap your foot and reverse and then stop. You will also need to set your open and close limits to get full movement...
@@IrocinZ
But, why the movement is too slow?
I appreciate
@@chuaongpacpo9801 Make sure you have the right voltage to the motor. Should be above 23v to operate correctly...
@@IrocinZ
I also just replaced the new transformer with 34v such as LiftMaster K76-37251 Plug-In Transformer
Thank you
Great video sr is there any way that you could help me i have a dual gate i am getting 5 flashlights but i can’t find anything about is the rpm reversal i can’t figure out what to do please help me
It usually means the arm is overextended or bottomed out and it will go the other way. The other scenario is there is an object that interfered with its operation and as a safety went the other way. This could be caused by a gate binding too...
Hey Irocin Z i replace the motor but now is not letting se my limits what would you recommend
@@jeanpaulrodriguez3367 if you've slid the switch to off and not save and it still won't let you set the limits, there is either another fault preventing it, or the board is bad. Did you look at you motor harness closely to make sure all the connections are good?
Hi there, when you remove the board, nothing will be reset? Thank you
Its a good practice to go through the motions again
I have a LA500 gate operator and it comes up with code 93. I've checked obstructions or if the gate is biding, which it is not. I even tried moving the gate arm without it connected to the gate and it only moves for a second or two before flagging code 93 again. The gears and rod gear look like they are in good condition and move with ease. I'm leaning towards the RPM sensor on the motor itself. What kind of voltage should I be seeing from the RPM sensor when the gate is moving? Would it be different than the LA400 or should it be the same (2.43V)? Also, what ranges of Voltages are acceptable for the rpm sensor? Would Chamberlain happen to have a voltage chart I could reference?
Chamberlin is extremely reluctant to give any information to any DIYer and you're not likely to change that. In the 400 system, the harness with the micro switches go bad causing the board to get false readings. The motor with the rpm sensor goes bad too. The voltage seems like it should be around 2.5 volts
It appears that the replacement motor for the LA400 with rpm sensor is the exact same 24 VDC motor for the LA500. Can you validate that this is true? Liftmaster wants to sell the entire arm/actuator and does not list the motor separately but the two motors appear identical. Is there a difference or can the LA400 actuator motor work on the LA500 actuator?
Not something I can answer for you
Thanks for the video...very informative. Question for you...I have the same gate, but Dual
operators. Our gate 2 stopped working during a recent cold snap. If gates are
closed, both would open. But when open and close signal given...Gate 1 would
start to close, but Gate 2 doesn't move. So Gate 1 then stops and reverses. I
get the 5 blink RPM reversal code.
I replaced batteries, and also had an extra arm so I replaced the Gate 2
Arm (thinking it could be an internal issue). No luck. Same situation is
happening and the same RPM reversal code. I'm stuck now at how to determine
what the issue is. Any advice is much appreciated. thanks
I would try relearning the arm open and close limits. If that doesn't work, possible there is a bad board. Try switching the arm connectors to see if it will work...
@@IrocinZ thanks so much for the response. I did try to relearn, but the Gate 2 again would not close. I did not think of switching the gates connectors. Will try.
If the same issue happens, then I guess it is likely a blown capacitor or something else on the board.
The gate 2 wiring wouldn't reach my gate 1 board pins, but I did hook my gate 1 connector (gate 1 was working) to the gate 2 pins. Received the same error (RPM Reversal). So definately a problem with the board I think. Will likely order a new board and transformer.
Thanks again for the videos.
@@TheJedsdead you're welcome!
Hello. I am having the same problem. Have you any luck with your gate? I've done multiple diagnostics and it's all pointing to board.
One other question, will the system work without the batteries if it is plugged in?
I don't believe so. The way I understand it, is its a 24volt system and the transformer or solar, whichever you have, is only there to charge and maintain the batteries. Plus as with any computer system, it requires a clean stable voltage to operate correctly. Fluctuations or voltage spikes are bad news for electronic components not designed to absorb that energy.
@@IrocinZ Thank you!
Nice video, question at minute 18:50 how do you saved the settings?
There is a little red strip of switches that you just switch over to "save" and you're done.
@@IrocinZ thank you sir
My LA400 has no power. Where should I check?
Start with checking the batteries since the system runs on 24vdc. It has to have charged batteries to operate. Then check to see if your transformer is working. If both of those are good, check your two 20amp fuses. If all that is good, it's a possibility the board is bad
Hello Irocin Z, will the arm operate at all if voltage is below 24V? Mine has about 23.6V. I just replaced the gear assuming that was my issue. After replacing the gear, as I try to set my limits, as I'm depressing the set limit button, the motor would run a little but then stop, then I'd have to let my finger off the set limit button and depress the button again to get it to move, repeat, repeat. The diagnostic light blinks 5 (RPM reversal). Could a low supply of voltage at 23.6 cause a RPM reversal error reading?
@@tonylee938 Not usually. If its setting a code for RPM reversal, that usually means that the outer limits haven't been learned. I found with mine, it took some trial and error to get it to learn without setting that code.
Keep in mind, and I forgot to mention this in my original question, that I received the RPM reversal error while testing the arm when it was NOT installed on the gate, so there was no resistance present in the arm in opening or closing. The arm was sitting on top of concrete blocks. I'm wondering if I have a bad motor or bad board. I'm trying to rule out bad batteries, and hence my question about the gate operating with batteries power supply below 24v (23.6v in my case). Any suggestions?
What's your PayPal? I owe you a 12 pack (at least)! Just ordered my replacement board and so happy it's not an arm. Appreciate you taking the time to make and post the videos
You're very welcome! Glad the video helped. If you would like to donate, you can. My PayPal is Irocinz@gmail.com
i replaced my transformer and now all the lights are flashing
You need to check the batteries and see if there is any charge. If all the lights flash, you could have a popped board...
Yikes! Tried really hard to get support for our 10 year old Chamberlain gate opener. Simply awful experience. This company (now Liftmaster it seems) is on our permanent list of companies to avoid.
Yeah, getting support from them is a little tough but it can be done...
Totally wrong steps. First unplug transformer read accessories imput should read over 24dcv. If under 24vdc replace batteries. Next unplug batteries from board then plug in transformer test at plug in on board. Should read 32vdc.
This is also first generation la400 it will also take a 24vac 40va transformer.
Information on how to repair these is limited and the manufacturer doesn't like to release it unless you're a trained technician. Alot of what I do Is not written in a book and is kind of common sense type of diagnosis from 30+ years of being an auto tech. Your information is definitely welcomed as it could help someone else and I appreciate you posting.