Question about Lite On Heating & Cooling
what I have always been told is if your 24 volt side burns out check the high volt side if the hi volt side burns out check the low volt side.
A quick way if the primary side is burningout due to a problem with the low volt side:
1 MArk all the thermostat wires at the indoor unit
2 Disconnect them at the indoor unit.
3 Check main line voltage before proceeding (A 208 volt is not considered 220V and 240v Is not considered 208V> In these circumstances the voltage may have changed with the power company replacing a transformer and now you need to change the main power input lines at your control transformer for the correct operating voltage). If okj then proceed:
4 If you have an amp meter attach it to one of the lines going to the transformer.
5 Apply main power and listen for hum, note if smell starts again and if so problem has to be in board or main incoming voltage too high or too low. Amp draw should be less than 3 amps.
6 If your to this point and still havent found any trouble in the above as of yet, Connect the wire marked "C" together. Then just touch the thermostat wires one at a time to the places where they go on the indoor unit and watch the amp meter. If you donmt see the meter jump the circut is probably ok but leave them disconnected until you touch all of them to the correct place or wire. Here is a possible problem I ahve seen a thermostat wireing problem if the wires are stripped too far and a "whisker" of the wire sticks out and allowes one of the other wires to cross short out. In this case just cut off the excess wire or bend it over out of the way asnd continue with the test. You can always cut it off later after the tests. If you see the meter jump up and stay up and /or blowes the fuse the wire that you used and it blew is where to consentrate.
7 No wiring problem found means that you could have a relay or contactor not pulling in properly.
and this will cause the amp draw to go way over the transformers power out put or VA rating.
8 Inspect the thermostat wiring for the "whisker" I mentioned above.
9 If you have done this to the end of the thermostat wires and your main incomming voltage is correctly wired in on the transformer andf your relays and contactors are pulling in evenly and not delaying excessively your problem should be fixed.
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Posted on Apr 25, 2009
It sounds like you may have a loose connection somewhere in the circuit. Check the output connections. Then see if there is a splice somewhere ...
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Posted on Jul 08, 2009
It sounds like that unit is connected to a "power saving load controller" device from the power company. The power company can turn your unit on & off with a radio signal. If you manually activated contactor and unit ran. I would bet that the power company's device or the wiring connecting it is where the problem lies. Call the power company and have them check their device. If they tell you that the device has been tested remotely and is working fine. Explain to them that you can activate your unit manually and it works fine. They should not charge you to come out. Those "load controller devices" have a pretty good longevity record.
Posted on Jul 11, 2012
Testimonial: "Thank you. I was not aware that the power company had that ability. I will give them a call and ask about a test of their unit. Last year they sent me a postcard asking if I wanted to participate in their energy saving program. I declined but was not aware that they still had a device attached which could do it. I really hate surprises."
There is a short circuit.
Copy following link to identify possible problem and download manual
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Posted on Jul 17, 2012
One way to troubleshoot that is to take out some of your fixture bulbs on the system and be sure you are counting bulb wattages that are installed .turn on the transformer and if your outage problem goes away , you know you have too many light fixtures for the transformer output wattage and will need a larger transformer or install smaller wattage bulbs where you can so you are under the rated wattage for the transformer . I have also seen where a light fixture is rated for say a 50 watt bulb but when it was installed at first it was installed with a 20 watt bulb and the transformer held the load , but as the bulbs burn out , they get replaced one at a time with 50 watt bulbs , which eventually takes the lighting wattage over the wattage output of the transformer and it begins to fail . Hope that helps . John
Posted on Sep 27, 2012
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