HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC
This answer was rated:

I repaired a leak on a unit model AS18AORCF I hadded the 40

ounces that they were...
I repaired a leak on a unit model AS18AORCF I hadded the 40 ounces that they were recommending BUT the low side pressures were close to the freezing temperatures of R 22 which was arround 60 PSIG I do have about 16feet line which is what they say is standard The other thing that I found different then the LG systems that I am use to is the condensers fan never really went fast. I had a delt t of about 40 on condenser is this ok. Another situation was that the compressors suddenly stopped the service manual tell me this is to stop the inside coil from freezing . Should I force charge until temp/pressure on low,side gives me 40'F ( 69 PSIG withe refrigerant 22) or shoul I just let it go. Sorry about all the question
Show More
Show Less
Ask Your Own HVAC Question
Answered in 20 minutes by:
6/30/2013
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,527
Experience: Furnace, A/C and heat pump specialist.
Verified
Hello.Sorry you are having problems. My name is XXXXX XXXXX I will do my best to help.Please wait to leave rating until we are finished.Is the unit icing at the 60psig and what is the indoor temp and outdoor temp when you have the 60 psig?
Ask Your Own HVAC Question
Customer reply replied 4 years ago
First are you familiar with these units. If you are is it abnormal for the condenser fan to run at a low speed . The delt T outside was 40 I.e. 75 ambient and 115 coming out by fan. Temperature inside was 49. But if you are familiar with these units you will know that the condenser will stop so no freezing happens at coil so to answer your question there was no freezing. So the basic question is should I put more refrigerant into the system even thoug I weight in the required ounces by the specs and is it normal for condenser fan to run slow I.e. is there a delt range in which the condenser fan will speed up
I have not worked on this particular model Samsung mini split. I have seen some that the condensing fan runs slower than what we are used to seeing. I am going to open to other experts who may know the Samsung model a little better. Please wait to leave rating until you receive a satisfactory answer.
Ask Your Own HVAC Question
Drcool
Drcool, HVAC Technician
Category: HVAC
Satisfied Customers: 2,086
Experience: i have been an A/C tech for the past 12 Years. working on window types, split type, and package
Verified
Hello,

Before you charged the unit, did you evacuate the system, did you use a vacuum meter and how low were you able to measure the microns before charging it up?

Did you replace the bullet type filter stainer?

Those answers affect the outcome of your unit.

115 F is almost the upper limit as a discharge temp so I am thinking, there could be air left on the system and the filter strainer could be a little bit clogged that is why the suction pressure is just 60 psi.

Do you have the port to measure the discharge pressure?

If the unit would trip off on a freezing evaporator coil, it should indicate an alarm if there is a digital display at the front of the unit.

By the way, where did you get the 49F reading inside? Was it the output air of the unit?
If it is then it is just fine.

Now, to test if the anti freeze is the one triggering the condenser to stop, then you can temporarily remove it from the copper pipe where it is inserted. You have to remove the stainless clip first and please do not pull from the wires of the sensor.

Leave it off the copper tube and observe if it would still cut out or continue to run.

In some models I have seen, the condenser fan is dual speed and the speed is controlled by a temperature sensor located in the condenser coil. If the ambient is cold, it would run the low speed and if it is warm, it would use the high speed of the condenser fan.

Double check the capacitor of the fan too, it could also be leaky that would contribute for the slowing down in case you have a single speed motor.

-
Ask Your Own HVAC Question
Customer reply replied 4 years ago
So that you have a better understanding I want you to know that I am a refrigeration air condition mechanic have been doing it for 20 years . What I have not done is Samsung units I do a lot of L G. So what I am looking for is some one that actually has worked with these units especially this older,model to let me known that yes /no it's not write for condenser fan to run slow I.e. is there a delta which fan goes to hi .As you said 115'F is top limit does that mean if goes higher will condenser fan come on OR should it be on at this temp. As for condenser shutting of well evaporator stays on service manual says its o.k. Its to help with inside coils not freezing . The question then is maybe I don't have enough refrigerant even though I put in the required ounces to rating plate using a scale Now my gages shows 60psig in some units that is ok others need to add to bring it up to proper pressure/temperature .THAT IS WHY I NEED ADVICE FROM SOME ONE WHO ACTUALLY HAS WORKED WITH THESE UNITS TO LET ME KNOW,FROM EXPERIENCE THAT MAYBE THERE IS NOTTING WRONG AND THAT IT IS DOING WHAT IT NEEDS TO DO .
Hello,

I asked those questions just to be sure that you did the required procedure before charging the system.

Since you are an HVAC tech, then I would assume you know what you are doing.

I have seen the electrical schematics of your unit and seems the condenser fan is dual speed but controlled by the indoor unit.

I have installed a couple of Samsung unit, can not remember anymore if it includes this model that you are working on.

I would say there is nothing wrong with your unit. At 60 psi, the evaporator coil would not freeze at all.

Just observe the unit further until it cools the room, or until you observe that the unit is reaching temperature, shutting the outdoor unit off, and would not start to freeze the starting pipe of the evaporator coil.


Regarding the condenser fan speed, I would say it is all fine with an ambient of 75F.

-
Ask Your Own HVAC Question
Customer reply replied 4 years ago
Thank you for taking the extra effort. Let me know how I can rate you and give you a bonus for your good work
Hello,

Just click the accept button after this reply of mine.

Thank you again for always using this service.

-
Drcool
Drcool, HVAC Technician
Category: HVAC
Satisfied Customers: 2,086
Experience: i have been an A/C tech for the past 12 Years. working on window types, split type, and package
Verified
Drcool and 87 other HVAC Specialists are ready to help you
Ask your own question now
Ask Drcool Your Own Question
Drcool
Drcool
Drcool, HVAC Technician
Category: HVAC
Satisfied Customers: 2,086
2,086 Satisfied Customers
Experience: i have been an A/C tech for the past 12 Years. working on window types, split type, and package

Drcool is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

6,730 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

Related HVAC Questions
I have a replacement condenser from Goodman, the original
i have a replacement condenser from Goodman, the original was a variable speed and they have since discontinued it and as a warranty replacement they sent me a different condenser and the wiring is to… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
Condenser not running checked all breakers and thermostat
condenser not running checked all breakers and thermostat settings … read more
travis webb
travis webb
tech.
2,153 satisfied customers
On our heat pump the evaporator blower runs constant even
On our heat pump the evaporator blower runs constant even when set to auto. … read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
I am installing an Evaporator Control Limit switch on the
I am installing an Evaporator Control Limit switch on the outside heat exchanger for the upstairs central heat & air unit in my house. I know that it is just supposed to splice into the low voltage co… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
My carrier evaporator keeps on blowing the 3 amp fuses. I
my carrier evaporator keeps on blowing the 3 amp fuses. I already replaced the capacitor, contactor and lastly the transformer. You think that I have wires sticking together? … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
Condensate pump for a-c in split system ran continuously and
Condensate pump for a-c in split system ran continuously and now Lennox furnace Model GS18Q314E-100-5 will not come on. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
I am looking for a evaporator coil assy model number
I am looking for a evaporator coil assy model number G/HC030SA FOR CENTRAL ENVIRONMENTAL SYSTEMS … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
Moved into our new home and they added an AC condenser. In
Moved into our new home and they added an AC condenser. In the mechanical room there is a bundle of three wires that are not hooked up to the main board of the furnace. The bundle goes to the AC conde… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
New r410 condensing unit and new evaporator coil. gauges go
new r410 condensing unit and new evaporator coil. gauges go straight to retard when unit starts … read more
airheatman
airheatman
HVAC Technician
8,527 satisfied customers
I am told I have a leaking evaporating pan in a Lennox Model
I am told I have a leaking evaporating pan in a Lennox Model #C16-46-1FF. Iwould like to find a replacement pan. Is this possible, or can I tape crack? … read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
I'm gathering information on wall hung non-condensing
Hi. I'm gathering information on wall hung non-condensing boilers. I am the president of my Brooklyn co-op. We have 8 units in our building and each unit has it's own wall hung (Baxi) non condensing b… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
I have a Goodman CHPF4860D6AA Evaporator unit. The unit has
I have a Goodman CHPF4860D6AA Evaporator unit. The unit has run without problem for the last two years. Lately, it has begun to shut down and then restart on its own after about an hour or more. The l… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
953 satisfied customers
My refrigerador compressor is running so is the condenser
My refrigerador compressor is running so is the condenser and evaporator fan and all the lights but it wont cool at all … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,086 satisfied customers
Evaporator water flow too low alarm keeps happening.
Evaporator water flow too low alarm keeps happening. Recently cleaned coils now this. The pumps are running fine. The pressures are good on the approach. The water strainer is clean. What is this a ca… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
953 satisfied customers
I have a gibson C5BA-T42C- evaporator coil. Had a new
I have a gibson C5BA-T42C- B evaporator coil. Had a new condenser put in. they didn't change the coil. Said it would be ok. They used r410a freon. Case on this coil say r22. Is this coil going to work… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
Have trouble with unit suction pressure rise but discharge
Have trouble with unit suction pressure rise but discharge don't … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
Rheem Model number RCFA – HM3617AC, Suction pressure 68
Suction pressure 68 discharge pressure 92 why is my discharge pressure low. Outside temperature around 85 . … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
I have a furnace with an evaporator pump that i had to
I have a furnace with an evaporator pump that i had to repace all the relays and also the thermostat. After all is done it worked great for the winter except in order for it to work i had to put the t… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,730 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x