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Heads up about those new MRL machine roomless lifts
We installed three of those MRL units last month at a building on 42nd Street and had trouble with the brake release switches failing by week two. The manufacturer insists it's isolated but we found two out of three had the same issue with the solenoid sticking after a power bump. Just had a call where the car went into emergency stop at the 5th floor and wouldn't budge until we manually overrode the brake. Has anyone else seen this pattern with the newer MRL controllers?
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jordanblack25d ago
Calling it a pattern after two units is a stretch though. Power bumps mess with all kinds of electronic stuff, not just these lifts. You probably just got a bad batch or the electricians didn't ground the controllers right during install. I've seen guys skip the star washer on the grounding lug and then blame the equipment later. The emergency stop issue sounds annoying but not exactly a design flaw. Let's see if the solenoid problem happens on the next three before we panic.
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felix_black25d ago
Man, you nailed it with the grounding thing. I’ve seen more ghost issues from a bad ground than actual part failures on stuff like this. A loose star washer or a rusty lug can make a controller act totally bonkers during a power flicker. And yeah, calling it a pattern after two units is jumping the gun. Give it another three or four installs, maybe at different sites with different electricians, before you sound the alarm. The solenoid issue could just be a bad batch of coils from the factory, not a design problem with the whole platform.
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