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help with samsung AQV12UGAX needed!

July 8, 2015, 2:06 am
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hi all.i had post last year also a thread here and i had the code for the ac but it didnt help.my ac when i turn it on works for 5 min just the inddoor unit and then it stops and timer and smart saver leds are flashing after it stops.
at the outdoor unit ive noticed after i start the ac there is a 220v dc on the mains board after few seconds but on the pcb board there no led on.also after the ac stops by itself on the outdoor pcb there is no led on.no error code?i send the outdoor pcb for service and the tech there replace some parts and said that it should be ok.after he tested it.
is there a chance that i ve to reset both indoor and outdoor unit cause it looks like that there is no contact between them?or if u can diagnose any other problem i ll be thankfull!
the code i ve for that model is:547677D23d
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Testing RSW system in the workshop

July 8, 2015, 11:38 am
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175 Kw cooling effect, 25kg R-427a

all jury rigged in the workshop to be tested before shipping it out to the customer :)

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VFD rig we have for testing smaller systems
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Spaghetti monster, XRV204 compressor unit in the background
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Main screen on the control panel (took the liberty of erasing the values ;))
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Daikin iTouch issues

July 8, 2015, 2:51 pm
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Hi, I'm having problems with a hotel we look after. There are 5 floors of Daikin vrv III ducted units that are all controlled from 2 itouches. When I called Daikin tech they asked if they have the pen on top or on the side. They are the former.
In a nutshell two units have completely disappeared from the system and on the 5th floor room 521 has changed its label to its address (something like 1:1-01, which can still be seen in properties, and all the subsequent units on the list have shifted down one number I.e. Room 522 is now labelled as room 523 but is still 522 in properties and so on.
Unfortunately the bloke I spoke to at Daikin seemed quite inexperienced and said he had never heard of this change of labelling before and no idea how it could happen. Re the units that disappeared he said that they must have lost their addresses on the system and need re addressing and adding to the system.
I will be back on site tomorrow and calling them up again but any help from you guys would be great!

Thanks,

Markie.
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Turbocor history

July 8, 2015, 4:07 pm
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Daikin RZQ125KV4A

July 8, 2015, 4:40 pm
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Hi,

Could do with a bit of assistance with this issue.

Original fault code that appeared was L9.

Replaced a compressor and outdoor PCB on this unit, found a blocked expansion valve which caused the failure of the 2 components. Compressor got that hot, it melted the wiring harness to the compressor and damaged the board.

I have run the unit with the new compressor, outdoor pcb and expansion valve but the pressures seem all over the place in heating. Cooling seems OK. Head pressure will go anywhere from 350psi, to 500psi. Compressor is getting very hot again and I'm concerned its going to do the same again.

I'm wondering if the expansion valve is closing off too far and increasing the discharge pressure too high? Is this EEV controlled off a thermistor or pressure transducer?

Thanks in advance as always,

Rick
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ranco reversing valve stockists,in the uk

July 9, 2015, 11:40 am
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Anybody know who stocks these,climate centre show them in the catalogue but availability is not very good.
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Opportunity

July 9, 2015, 2:34 pm
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Good evening all.
I'm not sure if this is acceptable, or in the correct section. I'm sure the admin's will advise.

This is not a job/work offer.

This an opportunity to become involved in an existing registered business in Tenerife, and ultimately to take financial control. The reason is simple - retirement of the persons involved!

The core business is air conditioning sales, installation and maintenance, and which also includes pool heat pumps.

There also a secondary off-shoot that maintains (mainly) catering refrigeration.

You will require, and not in any specific order,

A CV that contains qualifiable and traceable experience.
An internationally recognised refrigeration training qualification.
A valid Refrigerant Handling Certificate. The Spanish 'Certificado de Gases Flourados' is very difficult to obtain.
A working Knowledge of Spanish. (The suppliers and some clients are Spanish speaking!)
Air conditioning and refrigeration experience.
A desire to work hard.

Interested?

PM me please, or email to graham@totalclimatetech.es
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MHI E85 fault code

July 10, 2015, 7:30 am
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Does anyone know what fault code E85 means on an MHI multi system?
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New cooler has high head and won't cool below 50 f.

July 10, 2015, 10:24 am
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Our open grab and go display cases are very basic. A Condensing unit, TXV, 2-circuit evaporator and a couple of fans. We've built a hundred over the years we know they work. I got a service call and the mechanic has us scratching our heads. It's a 404a system head pressure 350 suction 90. Superheat 8 f, discharge temp 50 f . The ambient temp is 72f- 76f. there are no outside air currents affecting it. Nothing is blocking return or supply grills. The discharge velocity is 260 fpm (normal). the delta T is 15 degrees f over the condenser. The mechanic has changed the TXV and drier, recovered the refrigerant , evacuated and recharged to the proper levels. He has changed the condensing unit and still no change.

The service manager the mechanic and myself are at an im-pass so I thought I'd toss it up to this group.

Thanks for taking the time...
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pictures of the "slaughter bench"

July 10, 2015, 2:39 pm
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All the parts laid out on the "slaughter bench" ready to be cleaned

and the compressor foundation of my own design, holds anything from an xrv127 to an xrv 204, with access to all the bolts, and place to put the oil collecting trays
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Relative humidity in freezer rooms

July 10, 2015, 11:41 pm
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Hi!!

One of our clients is interested in knowing the Relative Humidity in cold store working at -20 Deg C.

Are there any technical articles on this subject and/ or practical experience of our experienced members?
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York yt a1g1c2-ckhs

July 11, 2015, 8:52 am
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Dear friends from RE how are all you been?
Please, I'm working at one York YT machine and having the following message "SOLID STATE STaRTER NOT INSTALLED", it is fitted with an SSS 14L-40A starter panel, someone have ever seen this message before, that could help? Any reply, comments are Welcome.
Best regards,
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Tk s40 evap1

July 11, 2015, 10:36 am
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HELLO ... Fellow'm looking maintenance manual or whether the electrical diagram of a Rail Bus TK S40, someone has information hand wing ...
B / M 099 552 my mail is ausj790523@gmail.com

Regards ...
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Discharge superheat

July 11, 2015, 11:09 am
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Hi guys can you confirm this is correct as I am doubting myself

discharge superheat
1 x discharge pressure & check with comparator what temperature it is
2 x measure actual discharge temp
3 x difference between 2 give s you discharge superheat

r407c chiller @ 100%
discharge pressure 16.5 bar = 40C
discharge temp 64C
discharge superheat 24C ??????

is this correct

cheers guys
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Drains on ac units

July 11, 2015, 11:12 am
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Hi can someone help we have two daikin ftx25 of one outdoor unit drain runs are 4 m on both units on gravity owner is moaning why does one drip more than the other
He saying this is not right they are cooling great only 3 months old these people can be hard work
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Where do you fall? Interesting article

July 12, 2015, 9:47 am
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Mitsubishi electric

July 13, 2015, 10:30 am
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We have a msh 07 kv split unit r22 2 green lights come on indoor starts after 4 to 5 mins then green lights go out and left hand green light is flashing
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mitsubishi

July 13, 2015, 12:18 pm
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Daikin question???

July 13, 2015, 1:22 pm
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Hi was woundering if anyone can help me with an issue I have with some vrv units.
Have 4 ducted indoor units off 1 BRC1D controler. The controler says unit 4 is AF. I know the fault is about the float switch. But is there a way to figure out which indoor is unit no 4 from the controler? Could save me a lot of pain trying to gain access to units that are not in fault. Thanks
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climaveneta manual

July 14, 2015, 2:46 am
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Hi guys does anyone have a manual for a climaveneta cv300 c controller.
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