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Air conditioner
A / A Split, Brand "DP" of 36,000 BTU freezes suction pipe
15
hace 6 años
hace 6 años
= 10.0pt Good evening. = 10.0pt Looking forward to your suggestions. = 10.0ptI am repairing a DP mark air of 36,000 BTU, RLA current is 19.5 Amp., Which presents and / or observes the following:
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[*] = 10.0pt Evaporator unit freezing, suction pipe (thick pipe) and reaches the base of the compressor.
[*] = 10.0pt The fine pipe remains warm to the touch.
[*] = 10.0pt The fine pipe dryer filter remains warm to the touch.
[*] = 10.0pt The condensing unit has no capillary. = 10.0pt
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= 10.0pt I have done the following activities:
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[*] = 10.0pt Capacitor test. In the condensing unit, replaced the compressor (55 uF) and the fan (6uF). They measured 42 uF and 2.5 uF. The evaporator unit is good. [/B]
[*] [b] = 10.0pt Current and pressure measurement: 20.5 Amp. and 43 psi.
[*] = 10.0pt After performing steps a and b, I performed maintenance on the evaporator unit and then measured the current and pressure: 16.5 Amp (low consumption) and 43 psi (no pressure change).
[*] = 10.0pt After performing all of the above, I proceeded to introduce refrigerant to complete pressure. The current rose to 20 Amp. and the pressure was maintained at 43 psi. = 10.0pt
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= 10.0pt Question:
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[*] = 10.0pt After maintenance, what is the reason why the current dropped and the pressure did not change?
[*] = 10.0pt When refrigerant was introduced, why did the current rise and the pressure was maintained?
[*] = 10.0pt Where is the expansion valve of this equipment located?
[*] = 10.0pt Is it possible that the valve is clogged and is the cause of the freezing?
[*] = 10.0pt Have I skipped any steps or procedures in the evaluation?
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= 10.0pt [/b[[b[=10.0pt[/b[[b[=10.0ptIappreciateyoursupport.
hace 6 años
hace 6 años
Good morning, when an air freezes the low pressure pipe because the refrigerant's refrigerant capacity is not completely released in the evaporator, I have got air conditioners in the same conditions as you have. The failures can be the following:
1. dirty evaporator.
2. Evaporator fan capacitor damaged.
3.in an extreme case, excess refrigerant
make sure the evaporator is not clogged by any dirt or something else.
When the high pipe or valve is clogged, it does not release the refrigerant, so frost should not reach the low pipe.
the other questions you asked:
the amperage rises because the compressor is forced to pump the gas, to which you do the maintenance the gas releases its ability to cool, the pressures are normalized in both pipes.
My recommendation is that you check the temperature of the room or area that you are cooling with a thermometer,
another option is that you pull the gas into the system and empty it and then reload it little by little by checking the low pressure and the room temperature.
15
hace 6 años
Where the expansion valve is located in these DP airs. ???
This is 36,000 BTU.
Thank you.
hace 6 años
Good afternoon, the easiest way to get it is to follow the path of the high pressure pipe inside the evaporator, it has to be close to the refrigerant release pipe, you may get a capillary tube instead of an expansion valve.
hace 6 años
hace 6 años
Goodnight everyone. In my opinion, I think you should first do a "nitrogen sweep" and then proceed to the vacuum to just introduce the refrigerant. As already mentioned, it may be due to a blocked duct. The "nitrogen sweep and filter change, should always be done for any reason to intervene when opening the system
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