paul_h
20-12-2008, 09:01 AM
Hoping some electronics gurus can help me out here.
I've got a carrier split (42NG250H) that sometimes doesn't respond to the the remote.
Its weird because while I was there before I did anything, the unit was responding to the remote. I turned the unit off to strip it down and powered it back up when I had the fascia off and testing it, the unit wouldn't respond to the remote, but the a/c ran fine on test mode.
While testing it and the remote not working, I was checking the voltage to the reciever, 5vdc on terminals 1 and 3, and I did measure the reciver outputting 0-1.8v every time I pressed a button on the remote, but the unit not responding to remote commands.
Then when I put the fascia back on so the window covered the reciever, it started working perfectly again.
But I got a call yesterday saying it stopped working.
It could be the remote playing up, but it definitely was outputting light visible to my digital camera the whole time, and there was no channel options on the remote, so it's not a wrong channel. New batteries and reseting the remote has been tried too.
Even when the remote was not working, it always put out irfrared, and the reciever always responding with voltage output.
So besides guesswork, replacing the only non tested part (main PCB), can any further testing be done on reciever/remote?
Two points of interest, but non conclusive are:
The customer said sometimes the unit turns it self on, but I didn't see anything wrong with the board or connectors, that could be the emergency/test switch was on.
When changing batteries, the remote didn't power up, the batteries were a little loose, but it seemed to come good and worked about 10 times while I was there once I got the display working. When the owner called they weren't complaining about no display on the remote screen.
I've got a carrier split (42NG250H) that sometimes doesn't respond to the the remote.
Its weird because while I was there before I did anything, the unit was responding to the remote. I turned the unit off to strip it down and powered it back up when I had the fascia off and testing it, the unit wouldn't respond to the remote, but the a/c ran fine on test mode.
While testing it and the remote not working, I was checking the voltage to the reciever, 5vdc on terminals 1 and 3, and I did measure the reciver outputting 0-1.8v every time I pressed a button on the remote, but the unit not responding to remote commands.
Then when I put the fascia back on so the window covered the reciever, it started working perfectly again.
But I got a call yesterday saying it stopped working.
It could be the remote playing up, but it definitely was outputting light visible to my digital camera the whole time, and there was no channel options on the remote, so it's not a wrong channel. New batteries and reseting the remote has been tried too.
Even when the remote was not working, it always put out irfrared, and the reciever always responding with voltage output.
So besides guesswork, replacing the only non tested part (main PCB), can any further testing be done on reciever/remote?
Two points of interest, but non conclusive are:
The customer said sometimes the unit turns it self on, but I didn't see anything wrong with the board or connectors, that could be the emergency/test switch was on.
When changing batteries, the remote didn't power up, the batteries were a little loose, but it seemed to come good and worked about 10 times while I was there once I got the display working. When the owner called they weren't complaining about no display on the remote screen.