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Forums13
Topics6,514
Posts36,874
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Most Online117 Jan 16th, 2020
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#30274 - 12/02/20 06:18 PM
Otis 211 Hydro
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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Having an issue with this unit. Keeps going down every other day. So far has gone down 3 times since 11/25/20. Faults have been ULFB. SHD. DMFB. SHD. UMFB SHD. All of them reset easily and it runs after. Any ideas what I should be looking to or for for the possible issue here? My first impression is these are valve coil/valve related issues. But I have taken apart and cleaned the screens and stem seats. No change in observable operation. Any thoughts anyone?
Jbblack1983@gmail.com
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#30284 - 12/04/20 03:42 PM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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Maddening... Where do I look to fix this then? Replace valve coils? Replace selector board for possibly sending erroneous signals?
Jbblack1983@gmail.com
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#30287 - 12/04/20 04:04 PM
Re: Otis 211 Hydro
[Re: M2RE]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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Not routinely. It did do a dance when the oil was cold one time, settled and releveled and shot through and leveled down. Only saw that once with cold oil and it didn't shut it down.
Jbblack1983@gmail.com
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#30291 - 12/04/20 07:06 PM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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According to a 418 page manual I read there are 2 possibilities for this fault. 1. Directional limit tripped while the valve coil is picked/energized. 2. Mother board component u78 is bad and generating false signal.. So we have gone through all the HW switches and adjusted the UP final further away from the landing by 1/2" incase the unit it intermittently leveling through or shooting through the floor.. We will see how it goes.
Jbblack1983@gmail.com
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#30301 - 12/07/20 03:43 PM
Re: Otis 211 Hydro
[Re: Indirtwetrust]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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Yeah... That was my concern too. But to rule it out we adjusted it any way. But it's down again today. So not sure how we are gonna proceed now..
Jbblack1983@gmail.com
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#30302 - 12/07/20 03:45 PM
Re: Otis 211 Hydro
[Re: M2RE]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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The valve seems pretty solid. Not releveling a lot. But these faults all say Valve feedback.. Scratching my head on this one..
Jbblack1983@gmail.com
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#30303 - 12/07/20 03:58 PM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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I guess we will try replacing the selector board and rule that out. Possible false signals being generated by the selector..
Jbblack1983@gmail.com
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#30311 - 12/09/20 04:58 AM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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Replaced selector board. And it was down again today. So today we replaced the stems/seats on the maxton valve to rule out that section of the valve at least... We will see tomorrow.
Jbblack1983@gmail.com
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#30320 - 12/10/20 11:21 PM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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It appears that replacing the stems and seats on the maxton valve has repaired the issue. Original issue being a SHD status with one of the following faults. ULFB UMFB DMFB DLFB.
Jbblack1983@gmail.com
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#30350 - 12/17/20 03:00 PM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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Well it worked for a few days. Now its putting up a RECF. Any one else have any ideas?
Jbblack1983@gmail.com
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#30352 - 12/17/20 11:11 PM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: Feb 2018
Posts: 131
Jblack83
15yr tech
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15yr tech
Joined: Feb 2018
Posts: 131
United States
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That would help explain the other Valve related faults... Our next step is replacing the valve. Will see how that goes.
Jbblack1983@gmail.com
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#30355 - 12/18/20 01:54 AM
Re: Otis 211 Hydro
[Re: Jblack83]
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Joined: May 2013
Posts: 224
Jcjmowrey
enthusiast
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enthusiast
Joined: May 2013
Posts: 224
Atlanta ga
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Sounds like your bypass isn’t set right and car is moving when it goes into “recycle” mode.
If all else fails, read the instructions
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