I am having a problem with our shop's A/C machine so I thought I would post here to see if anyone has experience with fixing one. The machine is a Robinair Cool Tech 700, 134a only. It started having problems during an A/C recharge, while it was on the evac. part of the cycle it stopped and according to my co-worker it displayed a high pressure error. When I cycled the machine it seemed to work normally, but during the vac. stage it started purging air and would not stop until you pushed the stop button. There is a solenoid upstream of the automatic purge valve which opens a couple of minutes in to the vac. stage and does not close. I have tried looking up specs on the Sporlan auto purge valve and have come up with nothing, I was trying to find a description of how it works or any other useful info.
Have the filters been changed recently? Do you check the vehicles for sealer before hooking to your machine?
Sorry I can't help you with your problem. We have bought our last Robinair machine. We have had nothing but problems from both of ours. Every summer we have to send them in to be fixed and it costs a minimum of $1000 ea.
Robinairs customer service is terrible and they burned us on the last one. They ignored our complaints and repair requests untill the machine was out of warranty. Once out of warranty then they wanted us to send it in for repairs............Bul like I said they let the warranty expire before offering help so that we would have to pay for repairs.
Yes I used an identifier and sealant trap thingy on every vehicle I hook the lines too.
Sorry for the double post something weird happened.
No they did not check for system sealer and I think it might have sucked up some leak stop. I priced out a replacement auto purge valve but its really expensive so I might have to try and find a rebuild kit. I will have to talk to my coworker tomorrow to see how he made out today. I recall changing the filter a couple of years ago, but to be honest we don't really use the machine that often.
If it did suck up leak stop, what would you suggest to clear it out ?
Edited: Fri June 04, 2010 at 9:35 PM by Ford_Dude
If it is the type that hardens. Breaking it down and checking each part for a restriction. Invest in a Neutronics Quick Detect. We will not reclaim any refrigerant with out getting a passing grade on sealer. Quick Detect will only check for the sealer that hardens. But that's all you really need to worry about as the sealers that swell o-rings just make a mess of the system not damage like the other type.
Talked to technical support (Robinair) they said to get a new purge valve. Long story short I ordered one and got the wrong valve from a local place. I thought, oh no big deal we will just return it and order the correct one. Well come to find out that auto purge valve is pretty pricey and the DM doesn't want to spend that kind of money. So they are sending it to the scrap pile.
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