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Old 2nd January 2012, 21:18   #1
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Default Technical and diagnostic Guide: Hyundai's HVAC systems

Today the alternator system of my santro went kaput. Totally Dead.
Went to replace it and found this at the HASS.

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Old 2nd January 2012, 22:04   #2
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

sidindica... thanks for the info.

Just noticed the i20 has the smallest compressor 90 cc... smaller than a 3.5 lac santro!! No wonder the A/c is useless!! The getz had a 155 cc unit!

Also the Verna Fluidic compressor is approx 24 % smaller than the old Verna! (122 cc vs 160 cc) Smart? Increased efficiency? Only time will tell...

Last edited by AbhiJ : 2nd January 2012 at 22:08.
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Old 2nd January 2012, 22:14   #3
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

Is it something to do with European market where you don't need a powerful AC ?
Just my wild thought
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Old 3rd January 2012, 18:10   #4
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

This is absolutely shocking. Why such small compressor on i20 ? Even the half priced Santro gets a bigger unit. Not sure what could be the reason behind this el-cheapo tactic by Hyundai. Owners of i20 have been complaining since a year and a half about the sub-par performance of the AC, and Hyundai's complete apathy to the suffering customers must have left a bad taste. I have lost all my faith on Hyundai. Everynow and then, they remove features from their cars without even a whisper in the market i.e. Rear Discs removed from Verna, 6th gear discontinued from i20 D, ABS removed from i20 Magna D.

Same goes for Fluidic Verna I guess. Given the increased cabin space & reduced compressor size over its predecessor, I am sure complaints will soon be flowing in T-bhp reviews. As said by AbhiJ, Only time will tell.

Thanks for posting Sid.

Last edited by ScorpMan : 3rd January 2012 at 18:20.
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Old 4th January 2012, 03:39   #5
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

i20 has compressor of just 90cc which is equal to what the small ZEN had.
It clear a lot why people complain a lot about i20 ac .
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Old 4th January 2012, 08:07   #6
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

90cc looks very much under powered. I have experienced low cooling when i am travelling with my friend in his i20. My i10 ac cooling is really good. But Manza is not up to the mark.
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Old 4th January 2012, 13:42   #7
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

90 cc for i20? With such a underpowered compressor too, it sweats to pull when loaded with 5 people.
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Old 4th January 2012, 14:30   #8
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

Quote:
Originally Posted by guyfrmblr View Post
90 cc for i20? With such a underpowered compressor too, it sweats to pull when loaded with 5 people.


The 1.2L engine from hyundai is not at all suited for i20 even with higher state of tune.Hyundai got the basics wrong with this.They should have plonked in a 1.4 Petrol and given a bigger 150 CC compressor.

Dunno which bloke in hyundai finalised the design specification of AC for i20 90CC! HUH!
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Old 4th January 2012, 15:31   #9
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Quote:
Originally Posted by sagarpadaki View Post
The 1.2L engine from hyundai is not at all suited for i20 even with higher state of tune.Hyundai got the basics wrong with this.They should have plonked in a 1.4 Petrol and given a bigger 150 CC compressor.

!
For the engine part its the government norms to play with !

They already have a 1400cc petrol. Albeit in automatic avataar.

For the compressor part. Agreed. Cooling power is more important than loading all models with ACC
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Old 4th January 2012, 16:32   #10
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

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Originally Posted by guyfrmblr View Post
90 cc for i20? With such a underpowered compressor too, it sweats to pull when loaded with 5 people.
To best of knowledge, they used 90cc compressor to save power of the engine. If they would have used 110cc compressor, the car would have lacked power and also low on fuel efficiency.
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Old 4th January 2012, 19:36   #11
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

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Originally Posted by amitpunjani View Post
To best of knowledge, they used 90cc compressor to save power of the engine. If they would have used 110cc compressor, the car would have lacked power and also low on fuel efficiency.
Alto has the said compressor. Though the 800cc engine is sapped of power, I've never had bad FE days with the A/C on. With the K10, the drop in power is almost negligible. So, I don't think it makes sense to skimp on A/C for the I20.

Being a known unsuitable unit(compressor), Hyundai should offer a free upgrade like FIAT did.
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Old 4th January 2012, 19:51   #12
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

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Originally Posted by guyfrmblr View Post
90 cc for i20? With such a underpowered compressor too, it sweats to pull when loaded with 5 people.
Dude, what about the diesel?

It has more that enough power to run a 150 cc compressor.

Also Getz also had a 1.1, 1.3 ltr engine and had a big compressor + great A/c

Is hyundai going backwards?
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Old 5th January 2012, 12:17   #13
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

90cc is a tad too small for a car whose interior space is comparable to sedans. Doesn't this also translate into a higher load for the compressor & thereby increasing chances of a premature compressor failure or reduced life?

Any idea on what are the compressor sizes for Ritz (D), Swift (D), Vista (D) & Micra (D)? Do these cars also have small compressors or it's just Hyundai turning the tide the other way?

Drive safe.
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Old 5th January 2012, 12:30   #14
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

let us not jump the gun purely on the cc of the compressor ; it is the efficiency of the compressor that matters more.

If you comapre the compressors in ,say a Corolla and the nhc,you'll find the nhc's at least twice as big as the Corolla's-and that for a smaller cabin

True , I have heard horror stories about the i20 ac but it could not be on account of the compressor only.
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Old 12th January 2012, 16:49   #15
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Default Re: Technical and diagnostic Guide: Hyundai's HVAC systems

Quote:
Originally Posted by Turbokick View Post
Is it something to do with European market where you don't need a powerful AC ? Just my wild thought
Not just a wild thought, but a very valid one. That's also the reason most European cars sold in India (e.g. Superb, Laura, Mercs) have such poor air-conditioners. Either that, or their air-con compressors wear out way too quickly (because they are working twice as hard as they were designed to).

Quote:
Originally Posted by vigsom View Post
True , I have heard horror stories about the i20 ac but it could not be on account of the compressor only.
In this case, it is. The i20 has way too small a compressor for a car of its class.
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