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Old 05-24-2010, 02:51 PM   #16
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York AC unit running slow...Please help :^(


Also has a section for ACA and an A with the wave line above it.........and it has OHM

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Old 05-24-2010, 02:54 PM   #17
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York AC unit running slow...Please help :^(


Doubt its rated to run a high load through it. Generally need a clamp on attachment. To clamp around the wire.

What amp listing is at the ACA setting.
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Old 05-24-2010, 02:59 PM   #18
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York AC unit running slow...Please help :^(


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Originally Posted by beenthere View Post
Doubt its rated to run a high load through it. Generally need a clamp on attachment. To clamp around the wire.

What amp listing is at the ACA setting.
200 with backwards y then 2m, 20m, 200m, 2m, 10

It also has clamp-on's

this is the model.
http://image.snapon.com/internationa...eedm503cpa.pdf
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Old 05-24-2010, 03:04 PM   #19
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York AC unit running slow...Please help :^(


Anything up in the attic unit that can keep the refrigerant from moving......like an expansion valve....or anything else electronic?
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Old 05-24-2010, 03:17 PM   #20
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York AC unit running slow...Please help :^(


Just last year I thoroughly cleaned the attic coil.....just looked and its pristine.
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Old 05-24-2010, 03:57 PM   #21
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York AC unit running slow...Please help :^(


My outdoor condensing fan runs at a lower speed in the evening when the outdoor temperature drops. Maybe your's does the same and you are also low on refrigerant.
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Old 05-24-2010, 03:59 PM   #22
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York AC unit running slow...Please help :^(


Some units have a 2 speed condensor fan which runs slower in the evening when it is cooler. Goes to high speed at around 70degF. You need a clamp on ammeter to see if the compressor is drawing any amps. Your inline meter is not suitable. Check this one: http://www.sears.com/shc/s/p_10153_1...1&blockType=G1
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Old 05-24-2010, 04:01 PM   #23
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York AC unit running slow...Please help :^(


One other thought: Check the points on the contactor to see how badly they are burnt. Could be a high resistance reducing current flow across the contactor.
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Old 05-24-2010, 05:10 PM   #24
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York AC unit running slow...Please help :^(


I really do not think it is a two speed.....I have never seen it run slower until now......It is 90 degrees in TX today

I hear the pump doing something but I'm not sure if its not doing anything or if the freon is bone dry.

The contact points have been cleaned....no change

Here is what the gauges read when its running with the red on the high, and the blue on the low.


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Old 05-24-2010, 05:13 PM   #25
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York AC unit running slow...Please help :^(


If the compressor is running. Your just about out of refrigerant. Even if its not running, your just about out of gas. Looks like it has a few ounces in it.

Needs to be leaked checked. And the leak repaired. And then it can be recharged.
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Old 05-24-2010, 05:54 PM   #26
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York AC unit running slow...Please help :^(


Shut it off ASAP. Looks like it has no freon and the compressor will now overheat and get damaged! Even a 1/2 lb sitting idle should get you a higher reading. Looks like you just have air in there now.
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Old 05-24-2010, 06:36 PM   #27
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York AC unit running slow...Please help :^(


Quote:
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Shut it off ASAP. Looks like it has no freon and the compressor will now overheat and get damaged! Even a 1/2 lb sitting idle should get you a higher reading. Looks like you just have air in there now.
Its off.....

I only had it running for 5-10 min max

The outside unit is under warranty so if the leak is in the unit they will have to fix it free of charge.
If the leak is between the unit and the attic.........Well I guess I get to spent $400 plus to have the leak found and fixed, and about 8 pounds of r22

And I still dunno why the fan is running slow.
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Old 05-24-2010, 08:13 PM   #28
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York AC unit running slow...Please help :^(


DO NOT touch the condensor when this is happening!! Your compressor may be shorting and backfeeding voltage to the motor and causing it to run slow. The next thing may be the relief valve and or fusite plug blowing and the whole compressor shorting out. Get a tech to check it.
Read these posts for more info:noise from carlyle compressor, hissing sound

AND

resi A/C with no cooling
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Last edited by yuri; 05-24-2010 at 08:19 PM.
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Old 05-24-2010, 08:20 PM   #29
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York AC unit running slow...Please help :^(


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One other thought: Check the points on the contactor to see how badly they are burnt. Could be a high resistance reducing current flow across the contactor.
+1.... I'm not HVAC but after replacing my Dual -Run Capacitor I could not get my compressor to start until I replaced the contactor which was not expensive to replace. My condensor fan was rotating slowly and the compressor was not running when I found the DRC rusty and bulging.

Not to change the subject....but still somewhat relevant ...what type of meter should I purchase to measure a capacitor's capacitance for yearly HVAC maintenance?
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Old 05-24-2010, 08:22 PM   #30
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York AC unit running slow...Please help :^(


Any meter that has a capacitance test feature like this one:http://www.sears.com/shc/s/p_10153_1...1&blockType=G1

I use a basic MA Line job.

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