A few years back working for Carrier Transicold, the ONLY way to fix this particular unit was a 3½ floppy and a laptop.
(software upgrade for the micro processor)
Now working for TK, about once a week I have to pull one out just to clear nuisance alarm codes and such. Can't be done with just the keypad anymore.
Heck, I've got a whole drawer in my roll-away dedicated just for my laptop, patch cords, floppies and CD's.
In some ways it makes my job a little easier, other times, it's a nightmare. More **** to go wrong.
Just the other night, had a road call to a warehouse where the drivers load was rejected. The insurance company wanted a 30 day history report on his unit.
Heck, I didn't even get out of my truck. I pulled up, handed the driver a cord and told him to plug it into socket 'A' on the unit.
40 minutes later, I'm back at the shop e-mailing the info to the I.C.
Same thing with the containers down at the port. I'm told they have a few new ones that have micro processor controlled electronic TXV's (can't wait to get back and play with those).
Any of the stuff you guys work on taking this route ?