Mazda Rotary Club

General => General Technical => I. C. E. & Electrical => Topic started by: rx7ali on July 09, 2014, 05:02:59 PM

Title: Rx8 air on
Post by: rx7ali on July 09, 2014, 05:02:59 PM
My air conn isn\'t working

Looks like the acc magnetic clutch isn\'t operating due to a popped fuse. Swapped the fuse out and it popped right away....

Any ideas before I get the multi meter out?

Is there any known issues with the compressor clutch?
Title: Rx8 air on
Post by: boosted on July 09, 2014, 07:35:40 PM
http://www.mazdarotaryclub.com/rx-8_onlinemanual/index.htm

pages 64/65 relay best place to start.
Title: Rx8 air on
Post by: rx7ali on July 10, 2014, 08:03:14 AM
Quote from: boosted;880840
http://www.mazdarotaryclub.com/rx-8_onlinemanual/index.htm

pages 64/65 relay best place to start.


Thanks... nothing mentioned about clutch blowing fuses so sounds like dodgy wiring... GREAT :2Confused:xconfused:2Mad
Title: Rx8 air on
Post by: boosted on July 10, 2014, 02:18:57 PM
With ac turned off...magnet wont be engaged does it blow straight away with it turned off?
Title: Rx8 air on
Post by: rx7ali on July 10, 2014, 03:22:52 PM
Quote from: boosted;880863
With ac turned off...magnet wont be engaged does it blow straight away with it turned off?


That\'s my next test once i get some replacement fuses :evillaugh
Title: Rx8 air on
Post by: rx7ali on July 13, 2014, 10:50:03 AM
It will only pop a fuse with the ac on, current passes the fuse until it\'s switched on.

It\'s a 10a fuse, if you put a higher rated fuse in it looks to engage the clutch but no cold air comes thru.

You can turn the clutch by hand, which I assume means the compressor internals are moving?

Any ideas?
Title: Rx8 air on
Post by: boosted on July 13, 2014, 12:34:05 PM
I would disconnect the plug to ac compressor (x19). Turn on ac.... fuse blows wiring or relay. If not then ac compressor. ohm resistance check of magnetic clutch. and socket where plug went into.

Page 68 of elec manual. Resistance check of magnetic coil.
Title: Rx8 air on
Post by: rx7ali on July 13, 2014, 01:17:40 PM
I disconnected the plug and the fuse didn\'t pop.
.

Must be the clutch... I hope.

eBay is full of compressors on the cheap so will get one and try just swapping the mag clutch, if still having issues the. Will look at replacing the actual compressor and regarding :-(
Title: Rx8 air on
Post by: boosted on July 13, 2014, 01:25:53 PM
Good thing about rx8\'s is parts are plentiful! no idea why!:2Rolleyes:Giggle
Title: Rx8 air on
Post by: rx7ali on July 13, 2014, 07:17:42 PM
Quote from: boosted;880996
Good thing about rx8\'s is parts are plentiful! no idea why!:2Rolleyes:Giggle


Yes £20 delivered for a compressor with clutch.
 
Going to try to have off just the clutch from the replacement item and see how easy it is without a bearing puller.
Title: Rx8 air on
Post by: boosted on July 13, 2014, 09:33:15 PM
Cool. Cheap as chips. Saves regassing as well.
Title: Rx8 air on
Post by: rx7ali on July 13, 2014, 10:00:04 PM
Quote from: boosted;881024
Cool. Cheap as chips. Saves regassing as well.


Let\'s hope so.

Just had her re gassed at kiwi fit which cost nothing as it didn\'t fix the problem.

That\'s a good tip for everyone.

Unplug your compressor and take your car kwik fit... Regards... Not fixed? No charge... Plug in... Boom free regass lol

I know this is pikey but after they :censored::censored::censored::censored:ed my dad over with his service the other week they can suck it :-p
Title: Rx8 air on
Post by: rx7ali on July 16, 2014, 07:06:30 PM
Compressor has arrived, really hoping it\'s just the coil from the clutch as I wouldn\'t trust swapping the compressor :-/
Title: Rx8 air on
Post by: rx7ali on July 16, 2014, 10:18:45 PM
yep.. clutch and magnetic coil are just held in place with one bolt for the clutch, snap ring for the bearing and circlip for the magnet.

simple bit of WD40 and a rubber mallet to tap out the bearing and magnet :-)

al done fairly quickly on the spare sat on teh bench in the garage.. now the small matter of replicating teh process with the compressor still attached to the engine :-/
Title: Rx8 air on
Post by: boosted on July 17, 2014, 10:39:44 PM
Good luck...fiddly and ackward on the car no doubt! Lets hope its got some gas in the system!
Title: Rx8 air on
Post by: rx7ali on July 18, 2014, 12:16:47 AM
Just had a go at it with the intention of rubber hammering the clutch bits off just like I did in the bench. No such fooookin luck. Even had a go at un bolting the compressor after jacking the car up and accessing the compressor bolts via the passenger wheel arch and with the compressor loose I still couldn\'t get enough swing behind it on either side.

Going to have to invest in a bearing puller and have a go tommorrow. Given up for the night with the car in lots of pieces... :-(
Title: Rx8 air on
Post by: rx7ali on July 18, 2014, 07:38:35 PM
Puller purchased, will finish tonight / tomorrow morning :-)
Title: Rx8 air on
Post by: rx7ali on July 18, 2014, 10:50:48 PM
Using the puller i got the old one off..

here\'s some pics to show you how screwed the electromagnet is. This may have been made worse by the testing with the 20A fuse the other day in fairness... but still... im fairly certain this was ballsed beffore hand and teh culperet of my popping fuses.

Got the replacement one on teh car and the heavens opened so now i just need to torque the compressor bolts, replace the belt and tention it up ready for a test run.

FINGERS CROSSED... i could really do with working AC right now :-(

(https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-xpa1/t31.0-8/10506786_10152208014132477_8745990405451005389_o.jpg)

(https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-xpa1/t31.0-8/10505021_10152208014137477_6596928311315944306_o.jpg)

(https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-xpa1/t1.0-9/10355764_10152208014127477_4521960492406398975_n.jpg)
Title: Rx8 air on
Post by: rx7ali on July 19, 2014, 12:11:28 PM
After getting it all back together i quickly tested that the clutch was doing it\'s job without the engine running by bridging the relay and that worked perfectly and locked up.

I started the car up and the AC clutch was engaged by slipping :-(

It started to smoke and i assume melting the clutch / magnetic coil AGAIN

FML!!!

Sooo now i duno what to think.. could just be the pump being too stiff? .. or could be a blockage in the system somewhere? Either way.... it\'s no longer a 20 quid fix :(
Title: Rx8 air on
Post by: boosted on July 19, 2014, 01:14:13 PM
Compressor bearings ceased by the sound of it...looks like another compressor and regass...stll cheap halfords are doing regass for 29.99.
Title: Rx8 air on
Post by: rx7ali on July 19, 2014, 01:29:05 PM
But if the compressor has gone, where do I start with the rest of the system?


I know some Hondas suffer from what the call "Black Death" which is where fragments of the compressor spread through the whole system?
Title: Rx8 air on
Post by: boosted on July 19, 2014, 01:33:32 PM
Dunno worth getting off and checking over . Could just be the bearings.
Title: Rx8 air on
Post by: rx7ali on July 19, 2014, 01:50:22 PM
Quote from: boosted;881208
Dunno worth getting off and checking over . Could just be the bearings.


I assume internal bearing? Well at this stage I be discharging the gas anyway so may as well have it off now... Will have another play soon!
Title: Rx8 air on
Post by: rx7ali on August 04, 2014, 04:53:01 PM
OK

SO... two more problems following some further work.

Swapped out the compressor and the internal bearing was indeed dead! Whilst the lines were off i took an air line and tried to blow thru the lines to clear any crud out. I noticed that one of the lines between the condenser and the evaporator wouldn\'t blow through? but i decided this was most likely just a valve doing it\'s job? Or maybe not? Is there a block at the evaporator maybe?

Also, the compressor clutch isn\'t engaging automatically any more when the AC is switched on :-/ If i bridge the pins on the relay the clutch works perfectly..and i tested the relay and there is a define click when current runs through it\'s coil... so wtf is up with that?

HELP AGAIN?!?!?!
Title: Rx8 air on
Post by: boosted on August 04, 2014, 05:28:20 PM
Itll have valves in there and now youve discharged the gas the pressure switch will not be made so aircon will not engage. I wouldnt do any more airline blowing. Connect it back up and regass it.
Title: Rx8 air on
Post by: rx7ali on August 04, 2014, 07:31:20 PM
Quote from: boosted;881768
Itll have valves in there and now youve discharged the gas the pressure switch will not be made so aircon will not engage. I wouldnt do any more airline blowing. Connect it back up and regass it.


Ok sounds good..

so interestingly i did take it to regas earlier today, and got told that it wasnt taking enough gas?

Now.. when i previously took it to kwikfit the guy used both teh high and low pressure outlets to perform teh bleed/flush/regas and topped it up just fine.

The guy who attempted it today only used the H (High pressure) inlet and said he was having issues. I pulled him up on it and he said "it should be fine with just the one" but he\'d give it another go with both H & L... but i had to leave due to running out of time.

Was he just doing it wrong?
Title: Rx8 air on
Post by: rx7ali on August 06, 2014, 02:50:34 PM
YAY COLD AIR!!!!!

Took it back to Kwik Fit to get the re-gass done.. took the guy two complete cycles as it wouldn\'t take the pressure initially until he threw some more oil into the system before the 2nd run attempt to pressurize. Once that was done it gassed up to the .450kg required figure and instantly blew nice cold air.. YUM!

The car will now be a pleasure to commute in during summer!!!
Title: Rx8 air on
Post by: boosted on August 06, 2014, 04:00:13 PM
Cool..wait a day before big celebration. Fingers crossed not a leak.
Title: Rx8 air on
Post by: rx7ali on August 06, 2014, 04:05:04 PM
Quote from: boosted;881825
Cool..wait a day before big celebration. Fingers crossed not a leak.


Owwwww...... don\'t say that!

To be fair, it should be ok. was holding pressure fine before.. and the only thing that\'s changed is the compressor has been bolted back on...

FINGERS LEGS AND EYES ARE CROSSED!!
Title: Rx8 air on
Post by: boosted on August 06, 2014, 09:09:54 PM
Cool fingers crossed....cheaper to run aircon on than windows open due to drag co efficient!
Title: Rx8 air on
Post by: boosted on August 07, 2014, 06:31:12 PM
still working to day? then celebration time...sods law my supra has packed up today ! regass tomoz!
Title: Rx8 air on
Post by: rx7ali on August 07, 2014, 07:15:15 PM
Yep still nice and cool.... Sorry to rub it in hehe :-)

Thanks for all the help
Title: Rx8 air on
Post by: boosted on August 07, 2014, 07:23:26 PM
sweet thanks!