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15-04-2005, 07:26 PM #1
LG heat pump condensor fans slow running
Has anyone come across a problem with the condensor fans running slow, then speeding up momentary then slow again. The unit overheats and the compressor shuts down. I was told this could be due to lack of refrigerant, as the unit has a thermostat which checks the condensor temp.
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15-04-2005, 08:31 PM #2
Re: LG heat pump condensor fans slow running
Mickvee
Is this a 407C system. I think I had a similar problem last year . It was glide related. Please offer further details.Any opinions, statements and facts expressed in this message do not constitute legal advice in any shape or form and is given for a general outlook in nature. You are advised to seek appropriate and specific professional assistance from a regulated and authorised advisor for definitive advice.
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15-04-2005, 10:39 PM #3
Re: LG heat pump condensor fans slow running
The unit uses R22 ,model LT-B3660HL, looking at the condensor clean condition it seems the fan have not run at full speed for a long time. There is a identical unit next to it which fan run full speed.
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17-04-2005, 03:40 PM #4
Re: LG heat pump condensor fans slow running
This sounds like a sensor problem.
Why don't you swap the sensors, pcb etc with the good one to eliminate the faulty part.
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17-04-2005, 06:34 PM #5
Re: LG heat pump condenser fans slow running
Well, you know,the temp differences between day and night in the UK are "so" large that it makes me wonder why on earth do you need the fan speed control.
Just connect the fan to the compressor AC supply and I can assure you that it will work just fine, Summer and winter.
You have to understand the reason for the fan speed control,
it need to keep the evaporating temp, more or less constant.
if the out door temp doe's not change much, so is the evaporator temp and so, the fan should run in a more or less the same speed.
Another thing to bear in mind, is the competition between the manufacturers about the amount of useless gimmicks that a mini split > vrv can do.
Can i get a cup of Turkish coffee out of a mini split? That will be the day
Chemi
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17-04-2005, 09:14 PM #6
Re: LG heat pump condenser fans slow running
Thanks for the help, I was planning to wire them to run full time at full speed, but I was not sure of the reason for the twin speed. I was told by LG that lack of refrigerant can cause this problem ?
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17-04-2005, 10:25 PM #7
Re: LG heat pump condensor fans slow running
I would reclaim all the gas and vac and recharge.
It could be overcharged.IF AT FIRST YOU DON`T SUCCEED.
DESTROY ALL EVIDENCE THAT YOU TRIED!
and go get a cuppa
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18-04-2005, 05:57 AM #8
Re: LG heat pump condensor fans slow running
Yes!
Recharge it ,you will make some money in +.(Dont you want that?),and the units will go much better.The customer also will be much satisfy.
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24-08-2005, 11:35 AM #9
Re: LG heat pump condensor fans slow running
Im just worried about sending something outside its manufacturers design, There may be good reason for the thing to have fan speed control and i would keep pluging at the problem.
Probably more out of stubborness than anything else. But for instance if the system is cooling a comms room we definatly need the fan speed control for winter cooling. Other wise you will freeze the coil.
If the system is a heat pump:
In the warmer wether if the unit is set to heating at a high temp but the indoor fan speed is set on a low setting the unit needs to ba able to slow down the outdoor fan speen to decrease the amount of heat being sucked into the system and hence decrease head pressure, With the fan speed control wired out the compressor can overheat.
If it is a cooling only unit and is not going to be used bellow a ambiant of 17 degrees, then i totaly agree the fan speed is not needed.
But if other i would not leave the system without fan speed control. Sorry to be abit pedantic
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24-08-2005, 05:13 PM #10
Re: LG heat pump condensor fans slow running
Why Not Wire Fan Into The Compressor. If The System Operates Ok Then You Know It The Condenser Sensor.it Will Save You Changing All Parts And Take Five Minutes.
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24-08-2005, 09:07 PM #11
Re: LG heat pump condensor fans slow running
Other wise you will freeze the coil.
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27-08-2005, 10:40 PM #12
Re: LG heat pump condensor fans slow running
l hadthe same problem and found the cap was blown on one side because it has two caps in one
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22-11-2005, 08:17 AM #13
Re: LG heat pump condensor fans slow running
its very easy for sensor to fall out from its copper pocket located 3/4 way down on condenser near the pipe entry of unit. this normaly happens on installation when your interlink cables or pipework hits it.
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