View Full Version : compressor overheating
kefah
30-04-2013, 08:23 PM
hi
i have crafft window type air conditioner 24000 btu capacity
it was leaking from service valve
so i degas it
then checked for leaks
and charged it
it works properly
and cooling perfectly
but the compressor is overheating
10323
i checked the temperature of
discharge line = 70 C
suction line = 19 C
compressor top cover = 73 C
current = 14 amp
volltage 210 volt
so where is the problem
Sumit
30-04-2013, 08:35 PM
Which refrigerant u r using ?? check the suction & discharge pressure's... How u calculated the length and size of capillary ?
kefah
30-04-2013, 08:42 PM
Which refrigerant u r using ?? check the suction & discharge pressure's... How u calculated the length and size of capillary ?
r 22
suction pressure
65 psi
i didn't touch the capillary
still as company made it
Brian_UK
30-04-2013, 08:58 PM
I see no problems with those temperatures.
Also, what type of compressor is it?
kefah
30-04-2013, 09:13 PM
I see no problems with those temperatures.
Also, what type of compressor is it?
it LG
scroll or rotary compressor
im not sure
RusBuka
30-04-2013, 10:48 PM
You dont tell us all parameters
InDoor temperature
OutDoor temperature
Airflow
SH
if something block air flow or you have jamed air filter)
Tesla
30-04-2013, 11:30 PM
Hi Kefah
Your suction superheat is excessive - 19degC @ 65psi. Current seems a little high - what is the current rated at? Did you charge it by weight with a set of accurate scales or by system pressures. Is it cutting out on a thermal safety because it looks like and old rotary (rotary's run hot). The way it was charged will help with the solution and the current rating. Sorry I don't have a btu converter.
moideen
01-05-2013, 06:03 AM
Hi kefah, your compressor is rotary. Rotary compressors have designed to work 100c to 120c.73c is normal.
Moideen-Dubai
kefah
01-05-2013, 08:43 AM
Hi kefah, your compressor is rotary. Rotary compressors have designed to work 100c to 120c.73c is normal.
Moideen-Dubai
thank you i appreciate that
kefah
01-05-2013, 08:45 AM
You dont tell us all parameters
InDoor temperature
OutDoor temperature
Airflow
SH
if something block air flow or you have jamed air filter)
indoor 40 c
outdoor 50 c
air flow good
sh dont know
kefah
01-05-2013, 08:47 AM
Hi Kefah
Your suction superheat is excessive - 19degC @ 65psi. Current seems a little high - what is the current rated at? Did you charge it by weight with a set of accurate scales or by system pressures. Is it cutting out on a thermal safety because it looks like and old rotary (rotary's run hot). The way it was charged will help with the solution and the current rating. Sorry I don't have a btu converter.
the current on name plate is 14 amp
i charged by using scales
RusBuka
01-05-2013, 10:03 AM
indoor 40 c
outdoor 50 c
I think its not good... Indoor temperature too high, i dont know TROPIC edition unit or not, but indoor too high.
kefah
01-05-2013, 10:45 AM
indoor 40 c
outdoor 50 c
I think its not good... Indoor temperature too high, i dont know TROPIC edition unit or not, but indoor too high.
the unit is tropical
so is that normal for the compressor or not
RusBuka
01-05-2013, 12:24 PM
Its normal.
kefah
01-05-2013, 12:37 PM
Its normal.
so what is the max working temperature and pressure of compressor
Tesla
01-05-2013, 01:22 PM
Hi Kefah
Moideen has given temps for comp. Why do you think the compressor is overheating?. Will it pull the room down to a reasonable temp or is it cutting out on a compressor thermal safety (klixon)? there may be no problem apart from a high initial load for the unit.
kefah
01-05-2013, 07:29 PM
Hi Kefah
Moideen has given temps for comp. Why do you think the compressor is overheating?. Will it pull the room down to a reasonable temp or is it cutting out on a compressor thermal safety (klixon)? there may be no problem apart from a high initial load for the unit.
the unit cooling
the compressot not cutting by thermal safety
but i asked why its overheated
thank you
Brian_UK
01-05-2013, 09:03 PM
Compressor case temperature is within limits.
System can only be analysed when it had reached design conditions, during pulldown readings will often appear strange.
Also, have a read of this....
http://www.parker.com/parker/jsp/documentdisplay.jsp?mgmtid=64a60f5712f32310VgnVCM10000048021dacRCRD
Lots more technical information available here if you want it...
http://www.parker.com/portal/site/PARKER/menuitem.eb20258a5093aeecb1935b1076108a0c/?&vgnextoid=5a2880961f66e010VgnVCM1000000308a8c0RCRD&vgnextfmt=EN&type=literature
kefah
04-05-2013, 09:44 AM
Compressor case temperature is within limits.
System can only be analysed when it had reached design conditions, during pulldown readings will often appear strange.
Also, have a read of this....
http://www.parker.com/parker/jsp/documentdisplay.jsp?mgmtid=64a60f5712f32310VgnVCM10000048021dacRCRD
Lots more technical information available here if you want it...
http://www.parker.com/portal/site/PARKER/menuitem.eb20258a5093aeecb1935b1076108a0c/?&vgnextoid=5a2880961f66e010VgnVCM1000000308a8c0RCRD&vgnextfmt=EN&type=literature
thank u all
nassrifi
23-05-2013, 07:59 PM
dear Kifah,, I think there is nothing wrong with your unit. it is running with normal conditions. do not worry, rotary comp.s usually run hot
regards
kefah
23-05-2013, 09:01 PM
dear Kifah,, I think there is nothing wrong with your unit. it is running with normal conditions. do not worry, rotary comp.s usually run hot
regards
thank u man
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