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Daikin ac shows no lights but beeps. Also error code u4.

Customer Question
Daikin ac shows no...

Daikin ac shows no lights but beeps. Also error code u4

Contractor's Assistant: How old is the appliance? Have you gotten error messages before?

About 8 years.No previous problems and recent service said in perfect condition.

Contractor's Assistant: Do you plan on doing the work yourself?

U4 suggests need for pcb replacement, but i am curous why no green light blinking

Contractor's Assistant: Anything else we should know to help you best?

No - think that is it

Have checked circuit breakers etc and power is definitely available to system.

LOOKING CLOSELY, THE GEEN LIGHT IS BLINKING VERY FAINTLY AS IT SHOULD BE. ATTEMPTING RESET HAS NOT CORRECTED THE PROBLEM SO I KNOW THE FAULT IS IN A PCB, JOB FOR TECHNICIAN. SO I WITHDRAW THE QUESTION. THANK YOU.

Submitted: 7 months ago.Category: HVAC
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Answered in 3 days by:
12/1/2017
HVAC Technician: gotoman for ac, HVAC Technician replied 7 months ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,348
Experience: 51 years of experience install design and repair of all makes and models of AC
Verified

Russ here. You could have several issues on outdoor unit. I have enclosed Chart. Thanks Russ

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Customer reply replied 7 months ago

As indicated in my revision of the question, I had resolved the issue, realised that the fault will be in a printed circuit board (most likely the external unit) which requires a professional technician.

I WITHDREW THE QUESTION.

Further, I had already obtained the data sheets you sent me.

I TRUST I WILL NOT BE CHARGED.

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