Author Topic: reversing valves Window ac Heat pumps  (Read 12958 times)

Offline Icehouse

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Re: reversing valves Window ac Heat pumps
« Reply #10 on: December 21, 2008, 10:50:30 AM »
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

Offline thepunk

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Re: reversing valves Window ac Heat pumps
« Reply #11 on: December 23, 2008, 02:47:18 AM »
I havew revaluated some of my material.  It looks like it is 240.  Though not explained very well.  I have a fair concept of the problem, just need to iron out some things.  I'll restate my question.  On a heat pump, window or outside, doesn't matter, both are 240.  One has 24 volt drop down one doesn't.  O.K. My particular unit has 240 with no drop down.  If my heat pump ac unit is in the heating mode, thermostat set for heating, but is blowing cold air.  I measure o volts across the reversing valve and I measure 120 volts across the defrost control contacts, what do you think is the problem.  If when measuring across switches and I assume the contacts of the defrost control are basically a switch and I get 120 volts with my volt meter then isn't the contacts open and they should be in the closed position when the unit is in heating mode and the selonoid not bad.

Offline Repair-man

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Re: reversing valves Window ac Heat pumps
« Reply #12 on: December 23, 2008, 04:13:52 AM »
We help consumers with repair issues. You are not in that category.

Heat pump units are all different. They are wired differently, they use different control voltages and there are no PAT answers for the questions you are asking....

A defrost control does not have SQUAT to do with the heating and cooling, so forget what you read on this defrost control. It is there in case the outer coils get frozen up during operation in winter months and turns off the condenser fan motor so  the coils will defrost.


You are only concerned with one thing...is the reversing valve being energized when the unit calls for heat? It must be activated for the unit to heat. The easy way to tell if the coil is working is to hold a pocket screwdriver across the top of the coil. The magnetism of the energized coil will have an effect on the screwdriver blade.

1. Reversing coil is only energized for heat


Anything else is likely a thermostat or valve problem. Any further questions requires a specific model number on this forum, thanks.


« Last Edit: December 23, 2008, 04:30:34 AM by Repair-man »
"It's only expensive if someone else fixes it for you" -
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Offline thepunk

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Re: reversing valves Window ac Heat pumps
« Reply #13 on: December 23, 2008, 08:13:41 AM »
O.K. Apparently no one on this forum can answer a simple question.  Well, I'll find the answer, but I guess it won't be here.  So sorry!  Apparently you don't understand the question anymore than I do!  And I am new at it.  I am starting to find out there is no true answer to any of it, and one tech or another it doesn't matter,  and there is no real answer, because there are no real technicians, anyhow the term for technician is "Someone who is skilled in the field they work in" But there are no experts on any subject."  Oh well, you gave it half a shot!

Offline Repair-man

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Re: reversing valves Window ac Heat pumps
« Reply #14 on: December 23, 2008, 08:28:12 AM »
That's gratitude for ya.

We've been making a successful living at this for 35 years, so even our halfshot is better than anything you'll find elsewhere, sparky. At least you can spell technician...that's the closest you'll ever come to being one.
« Last Edit: December 23, 2008, 08:32:47 AM by Repair-man »
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

Offline Icehouse

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Re: reversing valves Window ac Heat pumps
« Reply #15 on: December 23, 2008, 11:42:46 AM »
O.K. Apparently no one on this forum can answer a simple question.  Well, I'll find the answer, but I guess it won't be here.  So sorry!  Apparently you don't understand the question anymore than I do!  And I am new at it.  I am starting to find out there is no true answer to any of it, and one tech or another it doesn't matter,  and there is no real answer, because there are no real technicians, anyhow the term for technician is "Someone who is skilled in the field they work in" But there are no experts on any subject."  Oh well, you gave it half a shot!
Contrary to what you believe there are many Excellent Technicians, however they may not be good teachers.
Now before someone goes off on a tizz, I am speaking from experience. We had a gentleman who was a well seasoned veteran technician apply for a teaching position. After two months of students complaining he did not know anything I sat in on his class.
After class I said to him "Rudy" I know your reputation from when we worked at Carrier Building Services, and the problem is you cannot relate to inexperienced people.
Moral, as a "Master Technician" he was one of the best. As a teacher, he stunk.
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

Offline AJ

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Re: reversing valves Window ac Heat pumps
« Reply #16 on: December 23, 2008, 12:46:17 PM »
An Internet troll, or simply troll in Internet slang, is someone who posts controversial, inflammatory, irrelevant or off-topic messages in an online community, such as an online discussion forum or chat room, with the intention of provoking other users into an emotional response or to generally disrupt normal on-topic discussion.


7 Day ban!

Thepunk cannot create new topics, or reply to existing ones, send personal messages. Thepunk can however still read personal messages and topics.

Hope you find our website helpful.

Offline Repair-man

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Re: reversing valves Window ac Heat pumps
« Reply #17 on: December 23, 2008, 02:29:54 PM »
Why, Icehouse...are you inferring that:

a)  I am not a good teacher?
b) Perhaps I run out of patience too soon and want to strangle some stupid SOB?
c) both
d) neither

Obviously I am good with greenies, since I have helped thousands of them in the past few years on my own site. I don't bear any hard feelings any way you choose to accept me, I am just glad to be in the company of such good, experienced techs. If I get exasperated once in a while, it just means I'm human.


RM
« Last Edit: December 24, 2008, 04:00:49 AM by Repair-man »
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

Offline Icehouse

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Re: reversing valves Window ac Heat pumps
« Reply #18 on: December 23, 2008, 03:42:25 PM »
 :) I was not signaling out anyone in particular, rather explaining why some people run out of Patience with newbies.
I did not catch on that he was a "internet-troll, as I stink in computers.
I am happy to talk with seasoned veterans as well as newbies.
Putting us down because we did not answer his question the way he wanted was also wrong. Reminds me of a student I had that talked about working for his cousin and before I could stop him he blew out a 5 ton package A/C.
I help any and all and pray others feel the same.
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
a tragedy has happen to me : http://web.me.com/zenzoidman/Bobice/

Offline Repair-man

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Re: reversing valves Window ac Heat pumps
« Reply #19 on: December 23, 2008, 03:50:01 PM »
That's a good philosophy Ice, and I feel much the same way. It's a known fact that anyone with a keyboard these days can post a message. Unfortunately there are no Internet cops to corral the idiots and isolate them to their own section of cyberspace where they will be harmless to the  folks who have legitimate concerns and interests. But who am I to pass judgement?

 You can only do so much with what you have to work with, bless his heart...
« Last Edit: December 23, 2008, 03:52:36 PM by Repair-man »
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

 

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