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> 1 yr old Air-con making noise after 4 hrs

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TSmm004
post Jan 9 2018, 01:59 PM, updated 7y ago

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My Panasonic Air-con is only 1 yr.+. But these few months it was acting weird. About 4 hrs after U turned it on, some sort of "hitting sound" will come out.

My air-con technician told me that because the top of my closet was too near my air-con, that's why condensation occurred on the fan after operating for a few hrs.

Is it true?

He asked me to turn it on in medium level or high level to avoid such problem. But sometimes even with medium level on, the same problem occurred. The sound was really loud and woke me up at night.

Anyone got advise for me? cry.gif Thanks!
SUSadvocado
post Jan 9 2018, 05:46 PM

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QUOTE(mm004 @ Jan 9 2018, 01:59 PM)
My Panasonic Air-con is only 1 yr.+.  But these few months it was acting weird.  About 4 hrs after U turned it on, some sort of "hitting sound" will come out. 

My air-con technician told me that because the top of my closet was too near my air-con, that's why condensation occurred on the fan after operating for a few hrs. 

Is it true?

He asked me to turn it on in medium level or high level to avoid such problem.  But sometimes even with medium level on, the same problem occurred.  The sound was really loud and woke me up at night.

Anyone got advise for me?  cry.gif  Thanks!
*
condensation occur should go into drain pipe. unless your drain pipe cannot drain properly it should not be an issue.

if still under warranty, suggest call up Panasonic Help Line and get a tech to check it. or record down the noise.

the noise come from outdoor or indoor unit?
TSmm004
post Jan 9 2018, 06:51 PM

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QUOTE(advocado @ Jan 9 2018, 05:46 PM)
condensation occur should go into drain pipe. unless your drain pipe cannot drain properly it should not be an issue.

if still under warranty, suggest call up Panasonic Help Line and get a tech to check it. or record down the noise.

the noise come from outdoor or indoor unit?
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indoor noise, the noise came from the indoor air-con unit. It's like something is hitting on something! confused.gif
weikee
post Jan 9 2018, 07:03 PM

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What do you mean by hitting sound?

Water dripping sound, or some hard object hitting on another object?
TSmm004
post Jan 9 2018, 07:46 PM

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QUOTE(weikee @ Jan 9 2018, 07:03 PM)
What do you mean by hitting sound?

Water dripping sound, or some hard object hitting on another object?
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some hard object hitting on another object!
weikee
post Jan 9 2018, 11:09 PM

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QUOTE(mm004 @ Jan 9 2018, 07:46 PM)
some hard object hitting on another object!
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What you can test, try afternoon switch on for > 4 hours, see if it happen. If don't have maybe the sound come from roof. (if using metal truss sometime will have knocking sound)
TSmm004
post Jan 10 2018, 12:20 AM

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QUOTE(weikee @ Jan 9 2018, 11:09 PM)
What you can test, try afternoon switch on for > 4 hours, see if it happen.  If don't have maybe the sound come from roof. (if using metal truss sometime will have knocking sound)
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Everytime, if turn on more than 4 hrs, the hitting sound came back. I'm living in apartment, so the sound is not from roof, definitely from the air-con unit itself.
enriquelee
post Jan 10 2018, 11:10 AM

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Condensation will not create sound, it creates water only.
You can try to tighten the aircond cover, or change the fan speed once the knocking sound come.
TSmm004
post Jan 10 2018, 12:17 PM

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QUOTE(enriquelee @ Jan 10 2018, 11:10 AM)
Condensation will not create sound, it creates water only.
You can try to tighten the aircond cover, or change the fan speed once the knocking sound come.
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Every time this hitting sound occurred, I tried to change the fan speed, but the sound still continued!


kelvin8810
post Jan 10 2018, 12:20 PM

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could be the blower, the actual moving part of indoor unit
enriquelee
post Jan 10 2018, 01:19 PM

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QUOTE(mm004 @ Jan 10 2018, 12:17 PM)
Every time this hitting sound occurred, I tried to change the fan speed, but the sound still continued!
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After change speed the sound remain exactly the same?
ozak
post Jan 10 2018, 01:24 PM

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QUOTE(mm004 @ Jan 10 2018, 12:17 PM)
Every time this hitting sound occurred, I tried to change the fan speed, but the sound still continued!
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Just get the SC check for you.
TSmm004
post Jan 10 2018, 02:39 PM

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QUOTE(enriquelee @ Jan 10 2018, 01:19 PM)
After change speed the sound remain exactly the same?
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yes
enriquelee
post Jan 10 2018, 05:24 PM

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QUOTE(mm004 @ Jan 10 2018, 02:39 PM)
yes
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Means it is nothing to do with the air speed. Better get an authorized technician to check it out.
weikee
post Jan 10 2018, 07:53 PM

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Yeah cannot imaging how it got sound. Better call Panasonic to complaints and they will come. I complain before to Panasonic (via retail shop) for their ceiling fan and also gas losses inverter and they came (different occasions) and the fan they fix it free, while ac they spot the problem tell me where is it and I coordinate the fix with my installer also free.
SUSadvocado
post Jan 10 2018, 08:52 PM

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QUOTE(weikee @ Jan 10 2018, 07:53 PM)
Yeah cannot imaging how it got sound. Better call Panasonic to complaints and they will come. I complain before to Panasonic (via retail shop) for their ceiling fan and also gas losses inverter and they came  (different occasions) and the fan they fix it free, while ac they spot the problem tell me where is it and I coordinate the fix with my installer also free.
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do you know if modern aircon still have oil running in the copper pipe? or that was older days where oil used for lubricating the compressor flows around with the gas?
weikee
post Jan 10 2018, 09:00 PM

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QUOTE(advocado @ Jan 10 2018, 08:52 PM)
do you know if modern aircon still have oil running in the copper pipe? or that was older days where oil used for lubricating the compressor flows around with the gas?
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All will have oils.
halcyon27
post Jan 10 2018, 09:15 PM

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Not unthinkable but perhaps did a cicak or bug freeze to death in there?
SUSadvocado
post Jan 10 2018, 09:24 PM

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QUOTE(weikee @ Jan 10 2018, 09:00 PM)
All will have oils.
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if got oil how to ensure the oil can return back to the compressor so the compressor won't wear out due to lack of lubrication?

so far i never hear people talk about copper pipe requiring slope on the outlet like drain pipes do.
fireballs
post Jan 10 2018, 09:28 PM

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How fast is the noise?
Could it be electrical arc noise?

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