Home Forums General Discussion Technical Questions TAC 32 1854 fault

Tac 32 goes down with an 1854. LU/LD stuck error. IMS shows a 1100 after, but that is just a shutdown fault -- the culprit is the 1854. Already changed the selector board. Was good for almost a year and right back to it. (had door issues in between but not related). It usually happens when oil is warm but does not go out on Oil Visc fault. Any suggestions. I assume it is a magnet problem / sensor / but we have tried to mitigate that already.

Only when the oil is warm…
Valve sizing?
Dirty UL adjuster screen?
Valve adjustments or slowdown counts?
And magnets are glued (and in place) for sure and just don’t appear glued?

Like el said check screen,
how's up acceleration?
Does it only happen at certain floor?
Does it shutdown 1st thing after weekend/morning.

elmcannic anc OH boy -- thanks. 4 stop. Happens mostly on 3rd, 4th floor. Cleaned many a valve screen in my day (EECO, Maxton, etc) but have never done a Bucher valve (nothing like standing under the system you are disassembling, pit pipe stands or not). Have some Bucher information in the Endura stuff, but if you've got anything send it to me. The only reason I don't think it is dirty screens is 1) car runs great until sports team in hotel and oil really warms up (hand on tank -- its hotter than hell) and 2) LU/LD stuck error is the electronic side and slow leveling would give it MORE time to see sensors. Going back to magnets and lanes. Been doing this 20 years, IUEC since 2014 but as you know another set of eyes on something is always better. I'm right alot and wrong alot. But thanks so much and if you've got anything else, don't hesitate.

OH boy - no, seems always in the middle of a sports team when kids running room to room, parents partying, up down up down up down, etc. Never first thing. Up acceleration same -- will double check in IMS speeds on diagnostics though. Remember TKE puts that biodegradable BS oil that actually eats the seals. So who knows what its viscosity is when really hot.

I've seen plenty of the enviromax that cause other problems with hot oil, overshoot floors releveling canceling the calls and not opening the doors.
Any other faults? Like watchdog?

You guys were right. Up pilot screen filthy. What I don't understand though is why it had sooooo much effect in leveling and NO effect in high speed. Understand the port is smaller inside valve in leveling (less oil going through, same pump velocity, so screen dirty has more effect). In HS it never bounced, glitched, hiccupped, etc. But once we cleaned it (why put a valve in a pit inside a tank with an insulated top and 12 bolts (like it was built for war with no chance for heat to escape)????? Shouldn't need a packout box and a giggity impact to adjust or clean a valve screen. Nothing like electronic manually lowering.? What could go wrong there! Just like schindler inverted jacks? WTF

Its smooth though. Thanks. I just didn't think it was dirty screens because it bounced in leveling and didn't try to NOT level. Thanks so much.