Author Topic: Quick and Basic Troubleshooting  (Read 6189 times)

Offline Icehouse

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Quick and Basic Troubleshooting
« on: June 06, 2009, 03:44:26 PM »
Like Repair Man said, long winded.  :)
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 whirlpooltech

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Re: Quick and Basic Troubleshooting
« Reply #1 on: June 06, 2009, 03:51:20 PM »
Quote
I will not troubleshoot when I am tired, upset, angry,
or hungry.

 O0

Good stuff, keep posting.  O0

Offline Repair-man

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Re: Quick and Basic Troubleshooting
« Reply #2 on: June 08, 2009, 06:18:23 AM »
I have one problem with it...

Quote
You then should perform an efficiency test.
1. Remove cover from low pressure control and
jumper it out.
2. Front seat the suction service valve.
3. The compressor should pull into a vacuum

In order for the unit to pull a vacuum, the discharge  valve should be backseated not the suction. In fact, the system should never be started with the suction valve shut off.
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

Offline Icehouse

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Re: Quick and Basic Troubleshooting
« Reply #3 on: June 08, 2009, 07:08:58 AM »
Even General Electric and Whirlpool technicians manuals describe this test. In place of a suction service valve they advise you to pinch off the suction line and using the "Robin Air" pinch off tool, reshape the lines.
These are notes compiled from material used in teaching, so I research everything I write. All that has to happen is someone getting hurt or hurting someones equipment and wham "Lawsuit".
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: Quick and Basic Troubleshooting
« Reply #4 on: June 08, 2009, 08:01:57 AM »
Well, now you are talking about refrigerators and not central A/C...


make up you mind :)

there are no low side controls on a fridge and I'm sure there is some sort of test like this for fridges, not that we practice this as techs. However, I routinely check the integrity of the reed valve on A/c compressors by closing off the liquid line valves and letting the unit pump down to about +5 psi. If it holds after shutting the unit off, the valves are fine.
« Last Edit: June 08, 2009, 08:03:52 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: Quick and Basic Troubleshooting
« Reply #5 on: June 08, 2009, 09:59:45 AM »
 :( You sound like some of the "experts" that call me.
Depending on the application there are "low pressure" controls on refrigerators as well as air conditioners.
I worked on everything from 4,000 BTU window units in homes as well as 949 ton "Centrifugal Chillers" at JFK International Airport to gas fired absorption units on Wall Street.
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: Quick and Basic Troubleshooting
« Reply #6 on: June 08, 2009, 01:39:45 PM »
I am one of the experts, but I doubt I'd need to call you for anything but maybe to go for a cold one :)

As a past Rheem, Carrier and Goodman dealer, I can attest that the warranties clearly state that they will be voided if the unit is run with the suction line closed.

That's about all I got to say on the matter.
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

Offline Icehouse

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Re: Quick and Basic Troubleshooting
« Reply #7 on: June 08, 2009, 02:02:14 PM »
I am one of the experts, but I doubt I'd need to call you for anything but maybe to go for a cold one :)

As a past Rheem, Carrier and Goodman dealer, I can attest that the warranties clearly state that they will be voided if the unit is run with the suction line closed.

That's about all I got to say on the matter.

Say Jim, don't get your feathers ruffled, but if you ever read "Carrier's" training manuals the compressor efficiency test I described is in there. But again like you said you are an EXPERT.

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: Quick and Basic Troubleshooting
« Reply #8 on: June 08, 2009, 02:15:32 PM »
I keep my feathers numbered for just such an occasion, suh!   8)

and BTW, according to R.S.E.S., I was an expert back then too ....
« Last Edit: June 08, 2009, 02:21:55 PM by Repair-man »
"It's only expensive if someone else fixes it for you" -
The Virtual Repairman   www.repair2000.com

Offline whirlpooltech

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Re: Quick and Basic Troubleshooting
« Reply #9 on: June 08, 2009, 02:21:11 PM »
 :popcorn:

 

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