The pre trip function is very useful if the unit shuts down with frozen evaporater coils such as if you try to cool warm produce too quickly. When this happens defrost mode is not available and the only alternative would be to leave the unit off for a few hours which probably isn’t practical because obviously the inside of the trailer will get hot if you’re somewhere in the south.
If you start a pre trip it will heat the coils to test them and when you see the water stop pouring out of the evaporater drain tubes you can stop the pre trip and now the reefer will start in the normal way and run ok.
This is a good tip to avoid an expensive call out for folks who pick up produce all the time.
P.s. Personally I have not come across a modern reefer which didn’t have a pre trip function but I am not argueing thas they don’t exist because I have never worked for a big feet.
For all I know the Brandt ones may have them, I never saw anything in the menu to indicate they did.
I don’t think it really matters whether you have a pre trip function or not, it didn’t on any of the 1,000s of loads I’ve delivered in a reefer without a single temperature related problem, but maybe I’m just lucky…
newmercman:
For all I know the Brandt ones may have them, I never saw anything in the menu to indicate they did.I don’t think it really matters whether you have a pre trip function or not, it didn’t on any of the 1,000s of loads I’ve delivered in a reefer without a single temperature related problem, but maybe I’m just lucky…
I think you have been lucky, I’ve had dozens of problems with reefers over the years, by far the biggest problem since I’ve been over here is a, return air sensor problem that can only be fixed from inside the trailer and 3 times out the 4 times it has happened, I’ve been loaded had to have the load transhipped.
Another recurring problem is a ■■■■■■ low fuel sensor, even if it’s full of fuel, the unit shuts down and you cannot restart it again until sensor is replaced.
I have never had a problem with breakdowns, I’ve had a few problems, but nothing that has needed too much involvement by the spanner men.
I had a couple of grand’s worth of work done on a TK SMX I owned, but it was ten years old by then and never let go, it just needed a load of innards replacing.
I’ve had sensor alarms go off on the PBT ones, but nothing that ever stopped it doing its thing, most of those were when it was trying to heat a protect from freezing load in winter, rather than cooling issues.
So I should probably add that to my CV then, don’t know SFA about the workings of a reefer, but in spite of that I’ve never had a problem with a load.
That should open up a few doors for me 