http://www.refrigeration-engineer.com/forums/ The Worlds biggest Refrigeration site for Refrigeration engineers the world over to come together and talk. A massive Jobs bank and Company Database en Sun, 19 May 2013 23:48:27 GMT vBulletin 60 http://www.refrigeration-engineer.com/forums/images/re2011/misc/rss.png http://www.refrigeration-engineer.com/forums/ http://www.refrigeration-engineer.com/forums/showthread.php?39132-climaveneta-CVM2&goto=newpost Sun, 19 May 2013 15:08:18 GMT Hello, tell me how to reset the hours of the compressors on the controller, there is a manual with settings have a password, I can not find the desired parameter reset the clock?? Hello, tell me how to reset the hours of the compressors on the controller, there is a manual with settings have a password, I can not find the desired parameter reset the clock?? ]]> Refrigeration Books nick770 http://www.refrigeration-engineer.com/forums/showthread.php?39132-climaveneta-CVM2 http://www.refrigeration-engineer.com/forums/showthread.php?39131-A6-error-daikin-fan-rotates-chances-it-s-just-the-fan&goto=newpost Sun, 19 May 2013 13:46:03 GMT My Daikin inverter unit has an A6 error, which is an indoor fan problem.

I've taken the unit apart, the fan rotates fine with no power, but does nothing with the power on.

The manual tells me to test the voltages then possibly replace the fan, then the PCB, or both.

I want to know if anyone has ever come across a faulty fan, or if I'm wasting my time and it's almost certainly the indoor PCB? I don't suppose there is a certain way to test the indoor PCB by going though functions on the remote maybe, maybe some functions don't work when the PCB is at fault?

Thanks! ]]> Air Conditioning craigix http://www.refrigeration-engineer.com/forums/showthread.php?39131-A6-error-daikin-fan-rotates-chances-it-s-just-the-fan http://www.refrigeration-engineer.com/forums/showthread.php?39130-Sporlan-TEV&goto=newpost Sun, 19 May 2013 11:15:41 GMT I fitted a replacement power-head the other day, which had note with it reading. VN power-head is a non-migrating charge that may be substituted for a Hydraulic power head. Am I being thick? What do they mean? Grizzly I fitted a replacement power-head the other day, which had note with it reading.
VN power-head is a non-migrating charge that may be substituted for a Hydraulic power head.

Am I being thick?
What do they mean?
Grizzly ]]> Technical Speculations Grizzly http://www.refrigeration-engineer.com/forums/showthread.php?39130-Sporlan-TEV http://www.refrigeration-engineer.com/forums/showthread.php?39129-Help-needed-with-Ipac-DX-Downflow-Unit&goto=newpost Sun, 19 May 2013 09:32:58 GMT Hi guys I got called out to a Comms Room with 2 of these Ipac IP 30 Dx downflow units installed. The job is approx 2 years old and the customer tells me there been an ongoing issue with them since day one including refrigerant leaks. The room temp is a little higher than usual one side so i... Hi guys

I got called out to a Comms Room with 2 of these Ipac IP 30 Dx downflow units installed. The job is approx 2 years old and the customer tells me there been an ongoing issue with them since day one including refrigerant leaks.
The room temp is a little higher than usual one side so i checked the unit over.
The system operates on R407c.

I am getting:-

Air on to indoor @ 24c
Air off indoor @ 16c at best 15.8c
Suction pressure fluctuating between 5 and 6 bar
superheat taken from evap outlet between 8 and 11k
No temp drop across filter drier
Air on to outdoor coil was 12c
Air off 37c
High side at Remote condenser inlet fluctuating between 18 and 19 bar by speed controller.
sub cooling taken at remote cond outlet between 9 and 11k
Sight glass clear but flashes intermittently.

Any help would be appreciated.

Thanks ]]> Trouble Shooting mr slim http://www.refrigeration-engineer.com/forums/showthread.php?39129-Help-needed-with-Ipac-DX-Downflow-Unit http://www.refrigeration-engineer.com/forums/showthread.php?39127-Spec-on-pressures&goto=newpost Sat, 18 May 2013 17:02:05 GMT I got a thermo king Md 2 sr with 404a freon what should hi and low pressure be at idle with ambient temp 80degrees I got a thermo king Md 2 sr with 404a freon what should hi and low pressure be at idle with ambient temp 80degrees ]]> Transport 10GUAGETIM http://www.refrigeration-engineer.com/forums/showthread.php?39127-Spec-on-pressures http://www.refrigeration-engineer.com/forums/showthread.php?39126-Car-Air-Conditioning-Leaking&goto=newpost Sat, 18 May 2013 16:31:15 GMT Hi, just wondered if anybody could shed any light or suggestions.

I've got a customer with a Jaguar XKR 4.2 Supercharged.

Almost everything is invisible or inaccessible, low side port access requires removal of part of the inlet manifold, so I've strayed from doing this.

I originally visited, 4 weeks ago... Nitrogen pressure tested it, I pressurised it... Then allowed the pressure to stabilise, as I've found that sometimes as pressure bleeds from high to low side pressure will appear to drop without a leak... So waited for it to stabilise... The pressure held fine.

Used bubble spray on anything I could see, no leaks found.

Vacuumed it down, vacuum pulled down fine and micron reading pulled down to 1500 microns easily.

Vacuum also appeared to hold.

So I really couldn't find a leak, but today I was called back as Aircon wasn't working, when I checked it system was completely empty bar 20g so it had lost 680g in about a month.

Went round it again today in more detail, same as before on leak tests... But this time used an electronic leak detector which is supposed to detect a leak as small as 1/10 oz per year.

Moved it around the pipes and compressor connections and area... Nothing.

Only area it did seem to trigger was when I waved it around the condenser.
But it wasn't a constant detection, it was kinda like.. It would not detect anything then all of a sudden blip for a second then go back to nothing again.

Also noticed some black oily dirty patches at in the top corners.. Which I suspected is where air is rushing from below up between the condenser and gearbox rad (as condenser is sandwiched between a radiator either side... It's in the middle.)

Couldn't see full face or behind condenser because its covered by the rads, all I did was put the detector probe in the gap between.. So the lack of a constant detection and that I know airflow disturbance can cause small triggers of the detector.. As can just covering up the end of the probe. And lack of access to front and rear I was skeptical about taking the detector as evidence of knackered condenser.

So I've shoved some UV dye into the system now, and said I will go back in 1 week.

Will see what happens. Also screwed the high port valve cap down tighter to hopefully eliminate that also.

But if I can't find any UV dye traces and its still lost gas I am drawing a blank.

Reluctant to write off condenser, even though in back of my mind its a likely culprit... Because a condenser isn't something I wanna change on a car that expensive on somebody's driveway.. And they also seem to like jag dealers and genuine parts.

So if I write off the condenser, he takes it to jag and they say condenser is fine or fit a condenser which is genuine plus labour on top... Then it still leaks customer is going to be annoyed.

Just stumped for ideas and wondered if anybody could offer any help or advice.

Thanks. ]]> Air Conditioning Click4 http://www.refrigeration-engineer.com/forums/showthread.php?39126-Car-Air-Conditioning-Leaking http://www.refrigeration-engineer.com/forums/showthread.php?39125-Anyone-noticed-an-industry-full-of-cowboys&goto=newpost Sat, 18 May 2013 12:47:06 GMT Hi, I run my own refrigeration business in Blackpool and I have noticed a lot of related businesses are employing young untrained engineers that actually don't really know what they are doing and should not be working on jobs alone. Has anyone else noticed this and why nothing is done about it ? ]]> Commercial icesav http://www.refrigeration-engineer.com/forums/showthread.php?39125-Anyone-noticed-an-industry-full-of-cowboys http://www.refrigeration-engineer.com/forums/showthread.php?39124-Oil-differential-switch-trip-time&goto=newpost Sat, 18 May 2013 12:36:11 GMT Got a Daikin UAT30HY1 that i found tripped on oil pressure, CCH is ok. Once reset you have to turn it off and on in the plant room and then walk back outside to see if it started ok. First time it had tripped before i got there, so i reset it but waited 30 minutes as i worked on another system... Got a Daikin UAT30HY1 that i found tripped on oil pressure, CCH is ok.

Once reset you have to turn it off and on in the plant room and then walk back outside to see if it started ok. First time it had tripped before i got there, so i reset it but waited 30 minutes as i worked on another system just incase there was any heat still in the bimetalic trip mechanism.
This time i timed it and it tripped again in under 30 seconds. You can see the system is building oil pressure as 'pointer' on the bellows starts to lift off its stop but not quite enough to drop the heater out of circuit in the 30 seconds or so.

I poked a screwdriver in to lift the pointer to the ok position and when i checked it at about a minute it would stay there.

I did not get to check the oil pressure :o as had four of the things with various faults and this one wasn't a priority.

Right finally to my question! How long should the oil diff switch wait before tripping? Thought they were 120 seconds but am not that familiar with them tbh:D

The systems and 20 ish years old on R22 and 4GS mineral oil. I doubt the oil has been changed since new. ]]> Controls monkey spanners http://www.refrigeration-engineer.com/forums/showthread.php?39124-Oil-differential-switch-trip-time http://www.refrigeration-engineer.com/forums/showthread.php?39123-Fitting-Split-Outdoor-units-in-UK-USA&goto=newpost Sat, 18 May 2013 09:33:06 GMT I'm just curious as to how outdoor units are fitted in the UK and US with regard to health and safety. In Spain, a lot of installers just put the unit on their shoulders and walk up the ladder. I personally have a table winch where you place the unit on a bench and then wind it up, but even that is heavy and cumbersome. I also use an electric winch/pulley/ladder combination, using an extra set of ladders to pull the unit up. Are there any other options? ]]> Air Conditioning rubybree http://www.refrigeration-engineer.com/forums/showthread.php?39123-Fitting-Split-Outdoor-units-in-UK-USA http://www.refrigeration-engineer.com/forums/showthread.php?39121-Pre-casted-Concrete-pad-question&goto=newpost Fri, 17 May 2013 22:00:17 GMT Dear Engineers We would like to use precast concrete pads for the outdoor equipments (packaged and mini-split), the pre-casted pads will be placed on a (non-fixed) Tiles that are covering the roof waterproofing so I need your suggestion and recommendation about that case. is it safe to use... Dear Engineers

We would like to use precast concrete pads for the outdoor equipments (packaged and mini-split), the pre-casted pads will be placed on a (non-fixed) Tiles that are covering the roof waterproofing

so I need your suggestion and recommendation about that case. is it safe to use the pre-casted pads on a non-fixed tiles or will it make any problems ?? ]]> Technical Discussions Abu 3ali http://www.refrigeration-engineer.com/forums/showthread.php?39121-Pre-casted-Concrete-pad-question http://www.refrigeration-engineer.com/forums/showthread.php?39120-gea-chiller-glac-0412-ac1-info-required&goto=newpost Fri, 17 May 2013 21:34:23 GMT Looking for info on this chiller mainly a wiring diagram and anything explaining the controller. Ive been struggling to get in touch with a technical helpline or find anything on the net Thanks Looking for info on this chiller mainly a wiring diagram and anything explaining the controller.

Ive been struggling to get in touch with a technical helpline or find anything on the net

Thanks ]]> Air Conditioning Glasgowa/c http://www.refrigeration-engineer.com/forums/showthread.php?39120-gea-chiller-glac-0412-ac1-info-required http://www.refrigeration-engineer.com/forums/showthread.php?39119-pump-down-txv&goto=newpost Fri, 17 May 2013 16:08:03 GMT working on a split system. Lennox S- series 5 ton outdoor condenser. CBX27UH air handler 410a. Diagnosed last week as a bad TXV as the suction pressure was dropping constantly as the head pressure stayed constant. Adding refrigerant did nothing. There is a high heat load in the space - 90 deg F... working on a split system. Lennox S- series 5 ton outdoor condenser. CBX27UH air handler
410a. Diagnosed last week as a bad TXV as the suction pressure was dropping constantly as the head pressure stayed constant.
Adding refrigerant did nothing. There is a high heat load in the space - 90 deg F return temp.
The air handler is about 15 - 20 feet below the condensing unit which is on the roof. There is a p-trap installed on the suction line
We replaced the TXV today. No change. I told the tech to remove the bulb and put it outside the unit. The suction stabilizes however, it is too low at 115 psi.
Head Pressure is 250 psi (which is also low). One thing that the tech noticed, is that after we had pressure tested, and vacuumed the lines and then were ready to release our charge into the lineset and evap - he opened the suction side valve and no refrigerant came out. This is a scroll compressor. Is this normal?

Regards,

JBW ]]> Fundamentals jweins1 http://www.refrigeration-engineer.com/forums/showthread.php?39119-pump-down-txv http://www.refrigeration-engineer.com/forums/showthread.php?39118-Kelvinator-Electrolux-Error-Fault-Codes&goto=newpost Fri, 17 May 2013 11:32:31 GMT Hi All...

Just Wondering if there is anyone out there that may be able to help me out with a full list of Kelvinator/ Electrolux Air Conditioner Fault Codes... It's a pain when customers want a "cheap" product, and I install them, then inside the 12mth installers liability warranty they break down, and a trip is wasted just to tell the client that they have to call the warranty agent because it's not an install issue.

Can some one please post or PM me the error code book. I have other codes for other brands and tech info that I might be able to trade.. :)

Regards

Dogma ]]> Trouble Shooting dogma http://www.refrigeration-engineer.com/forums/showthread.php?39118-Kelvinator-Electrolux-Error-Fault-Codes http://www.refrigeration-engineer.com/forums/showthread.php?39117-Hanbell-rc-19-screw-on-york-yaes0715sa-50y-chiller&goto=newpost Fri, 17 May 2013 08:13:08 GMT Gentlemen I have an issue on three out of four circuits across two of the above chillers.
The issue being with loading and unloading, or more like the lack of it.Should be four stage's.
From observing the circuit that is doing what it should ,I have noted that at 25% load I should be pulling in the region of 70A and pulling 140/150A fully loaded.

The other three circuits are starting up and and going straight to 145A , this is resulting in the water temperature falling to quickly and the unit shutting down on temperature.
Granted the design of the water loop is not ideal , but thats for another day.

Incidently the front end on the controller is telling me that the circuits are operating at 25% load which obviously they are not.
I have tried manually loading and unloading the slide using magnets but to no avail, nothing changes.
I have changed the oil, oil filter, oil cooler solenoid valve,and checked the oil feed cappilliary for blockages.
I have even swapped the solenoid stems around on the stages , But nothing changes.
Incidently York in their wisdom have decided that there was no need for suction or discharge valves on these compressors , which means it's a reclaim on the compressor and evaporator every time, which is time consuming.

I had posted a video previosly regarding issues with one of these compressors which by the way still exists.http://www.youtube.com/watch?v=DHM5re2xmjk&context=C4225b48ADvjVQa1PpcFNrjnvbdXJXT6EumXLMBjBxmqKQ44IBYwQ=

Although it now transpires that that circuit is in fact stopping fully loaded, so are the other two but that one is the only one with the "clang"
Numerous leaks have been found and repaired on all circuit's , SO could the root cause be oil degredation due to excessive discharge temperature's causing clogging in the oil paths for for the slide????

Any advice welcome at this stage , as I'm at a loss on this one.:confused:

Cheers
STU ]]> Trouble Shooting stufus http://www.refrigeration-engineer.com/forums/showthread.php?39117-Hanbell-rc-19-screw-on-york-yaes0715sa-50y-chiller http://www.refrigeration-engineer.com/forums/showthread.php?39116-More-educational-vids&goto=newpost Fri, 17 May 2013 04:23:57 GMT Friday afternoon tutorials. http://www.youtube.com/watch?v=DQJ8JX17J58 http://www.youtube.com/watch?v=vRwIrbK8KDI Friday afternoon tutorials.
http://www.youtube.com/watch?v=DQJ8JX17J58

http://www.youtube.com/watch?v=vRwIrbK8KDI ]]> mikeref http://www.refrigeration-engineer.com/forums/showthread.php?39116-More-educational-vids