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Meaning of "UO " code when pressing test on Daikin brc1d528

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My dakin ducted air conditioner only makes a humming sound when turned on. It shows error code E3 when i press the test button

That means
"Outdoor Activation of high pressure switch"
so it seems you may need a service tech. Ring Daikin Service locally and ask them whether this code is a simple adjustment or a service call.

Feb 04, 2017 | Heating & Cooling

1 Answer

3 outdoor system brings same error code E5 02. Model rxyq12t7y1b x2 & rxyq14t7y1b. Ran test, finished test. Ran it fo 4hours after finishing test, then it brought up error code E5 02.

Not good. The Daikin Inverter models use current sensing to tell when the compressor is straining too hard, and set this code when something is wrong. If you are under warranty or not properly qualified to troubleshoot this compressor lockup symptom, I would highly recommend having a factory tech come out and have a look at your system.

Here\'s a link to the manual:

Daikin also has a ton of other tech sheets and training materials that are generally only privileged to factory techs. They describe troubleshooting and inner workings of the machines much better than the install guide.

Please mark my answer as helpful.

Jan 05, 2015 | Heating & Cooling

1 Answer

Green light flashing On Daikin fvy453cbv1

how many blinks, look up daikin error reset or daikin factory reset to clear the codes and get into secret service test mode.

Jan 03, 2015 | Heating & Cooling

1 Answer

How too solve daikin error code c4

c4 error code has nothing to do with outdoor pcb. Use code 41 to check the value of the liquid line sensor and test with mulit meter. Pretty rare fault. Turn the power off for 5
Mins and reboot your system.

Nov 10, 2014 | Cfm Daikin R410a Split System Air...

1 Answer


Insufficient gas. Need a tech to check for leaks, pressure test, evacuate and refill to correct levels.

Aug 26, 2013 | Daikin BRC1E71 Navigation Wired...

2 Answers

Is there a reset button on daikin splits? If so where can I find it.? Fault code U4.

the fault code for daikin u2 is power supply is too low the reason for this is complexed and needs an expert to fix it

hope this helps in some way

Dec 02, 2010 | Cfm Daikin R410a Split System Air...

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