View Full Version : beacon II any one
05-01-2007, 11:12 PM
well i am new here so it's my first post . first call on beacon control mc donalds cooler -box 50 f r-404-a e-7 error code ck-ed found low pressure switch stuck closed replaced , pressures still 65 lo 150 hi and thats with freezer runinng ck-ed transducer -ok, ck-suction line temp sensor-ok ck all sensors ck-ok charge-good removed eev removed screen not bad shape but reinstalled with out screen per. heatcraft unit works fine now box temp-35-f sup. 9-f it was just installed in dec. but i just dont feel good about it .i hope i dont get a call back anyone work on this type unit all the time
05-01-2007, 11:19 PM
Typing in complete sentences may help those who would assist you.
I was able to decipher most of what you were saying, and I can't say I have any experience with McDonald's controls, but it sounds like you may have a pretty good handle on it.
I usually get that uneasy feeling after leaving a particularly troublesome call. The entire ride home, I go over everything I did in my head, trying to think if I might have missed or forgotten something... In retrospect, I can usually point out several mistakes I made, or several things I could have done differently/more efficiently.
05-01-2007, 11:31 PM
I bet you're working on a Mac unit. Haven't heard of having to remove the screens, doesn't sound proper.
Head pressure is low, is one condenser fan shutting off when cold out?
Also, make sure the Smart Controller is set for R-404 and med temp.
05-02-2007, 08:55 AM
Last summer I got my @$$ kicked by a Beacon. I'm still undecided if it was the engineering or the engineer that was lacking. Good luck.
05-02-2007, 09:41 PM
05-02-2007, 09:46 PM
Thanks for the help. But smart controller was bypassed and the unit was running off the board in the evaporator coil. no call back today.low pressure switch replacement i think may have stopped the problem. at one point i almost riped out all electronics installed coil and a-19 thermostat and it would have ran for ever. but heatcraft might frown on that a bit.
05-04-2007, 11:01 PM
the last mac-7 unit i installed the low pressure switch was recommended to be set to 0-5 psi since the beacon system has a timed pumpdown after cooler or freezer satisfies. i found it in the mac paperwork.
05-06-2007, 01:31 PM
its been a few months since i worked on one but the mac7/beacon systems always seem to run a little odd as far as pressures go, on startup. (did that make sense?)
anyway the exv seems to programmed to do some things i dont see a standard txv do.
maybe it is just me?!:D
05-06-2007, 01:40 PM
Jeepster, Mac 7 Beacons for me are very few and far between. But Ive got some older Beacons with 300K coils and yes the EXV steps and ramps to adjust for load demands and a varied B.P.
05-08-2007, 12:14 AM
i had a similar problem found the eev running wide open and would not close
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