Slide retract problem

Topic: Slide retract problem - Aux. Comp? (Read 775 times) previous topic - next topic

Slide retract problem - Aux. Comp?

February 14, 2016, 06:52:44 pm

Went to retract the rear and front slides this AM to move and I did not hear the Aux. Comp. come on to deflate the bladder(s). When I started the engine the bladders deflated and we could move the slides in. We have been parked for 4 hours and have not heard the Aux. Comp. once yet. Thoughts?

This is not an emergency.

Re: Slide retract problem - Aux. Comp?

Reply #1 – February 14, 2016, 06:54:34 pm

Have you checked the aux compressor inline fuse?

Re: Slide retract problem - Aux. Comp?

Reply #2 – February 14, 2016, 06:58:01 pm

Yep - it's good.

Re: Slide retract problem - Aux. Comp?

Reply #3 – February 14, 2016, 07:02:24 pm

Michelle - You fixed it.

Just tried to retract the rear slide. Turned the key and the bladder deflated and the slide works perfectly. Aux. Comp. is running.

Duh - Do I have gremlins?

Re: Slide retract problem - Aux. Comp?

Reply #4 – February 14, 2016, 07:45:48 pm

Scott,

It either is still up to pressure from recent engine use or I wonder if your aux compressor fuse is blown...it hangs down below the compressor. Look to see if the front slide bladder is evacuated by looking outward for daylight with the curtain pulled away behind the driver's seat. .You also might turn on the left side switch labeled "air tank" to listen if air comes on that way....usually a delay to hear the compressor engage.

If it still doesn't come on, you might drain the air line with the pull ring on the outlet by the desiccation filter...you should hear air escaping if has pressure.

Lastly if the fuse is good, take off the "U" shaped cover from the auxiliary air pressure regulator (behind the compressor) and manually push the contacts together downward to see if the compressor will come on.

Unless your compressor is DOA, it should respond.

Jim

2002 U320

Re: Slide retract problem - Aux. Comp?

Reply #5 – February 14, 2016, 07:57:37 pm

Quote from: Carol & Scott – February 14, 2016, 07:02:24 pm

Just tried to retract the rear slide. Turned the key and the bladder deflated and the slide works perfectly. Aux. Comp. is running.

Duh - Do I have gremlins?

What was the sequence/behavior when it didn't work. Turned key, what happened to amber and red lights on key panel?

Re: Slide retract problem - Aux. Comp?

Reply #6 – February 14, 2016, 09:07:42 pm

Thanks for the response Jim - The fuse is good. I'll try the other stuff you suggested tomorrow.

Michelle - Carol turned key, waited for the amber light to stop blinking, red light on pressed retract - the hydraulic pump activated. Carol then checked the air bladder and it did not deflate. She then called me. I retried the BR slide then the Large Slide - Aux. comp. did not start and both air bladders were inflated.

I checked the fuse on the compressor - it is good - I pulled fuse and checked the spades - they were good - reinserted the fuse. As I have installed an in-line On/Off switch I toggled it on and off a number of times. I turned the key for the slides again and no Aux. Compressor - no air bladder deflation.

Started the engine - had about 80# of pressure in the tanks. Activated the BR Slide key again and the bladder deflated. Then retracted slide and turned off key when appropriate and bladder inflated. Duplicated the process for the LR slide and everything worked.

We drove from Benson, AZ to Tucson, parked, leveled coach and extended the slides. Everything worked as usual.

Sat for about 4 hours and did not hear the Aux. Comp. cycle and tried to retract the rear slide. Amber light came on, Aux. Comp. started and bladder deflated. Retracted slide, turned off key and bladder inflated. Turned key, deflated bladder, extended slide.

I will try again tomorrow and see what happens. We are here for a week before we go to Yuma for a month.

Re: Slide retract problem - Aux. Comp?

Reply #7 – February 14, 2016, 09:17:48 pm

I had something similar happen and found that leveling the coach solved my problem.

Re: Slide retract problem - Aux. Comp?

Reply #8 – February 14, 2016, 09:23:52 pm

Thanks T-Man. The coach was leveled this morning before we tried the slides.

Re: Slide retract problem - Aux. Comp?

Reply #9 – February 14, 2016, 09:28:14 pm

Quote from: Carol & Scott – February 14, 2016, 09:07:42 pm

Michelle - Carol turned key, waited for the amber light to stop blinking, red light on pressed retract

OK, to clarify. Amber light started flashing with key turn, then went solid amber? Going solid amber would generally indicate the HWH "brain" thought the bladder had deflated/vacuum pulled and you were level.

Red light only went on once you pressed button to retract, correct? Red light doesn't come on itself, I don't believe.

Quote from: Traveling Man – February 14, 2016, 09:17:48 pm

I had something similar happen and found that leveling the coach solved my problem.

That would be my thought except if the amber light went on solid, which it sounds like it did.

ETA Brad Slaughter is the resident Grand Poobah of the 2002 slide mechanism (which is unique to that year). Hopefully he'll chime in.

Re: Slide retract problem - Aux. Comp?

Reply #10 – February 14, 2016, 09:39:09 pm

Turned key - Amber light blinking, No Aux. Comp to vacate air in bladder. Amber light became solid - indicating that the bladder was deflated. Carol pressed button to retract. Hyd. pump started, the slide did not move.

Sorry I have not been clear.

I just turned the key, bladder deflated, aux comp turned on and everything works fine.

Re: Slide retract problem - Aux. Comp?

Reply #11 – February 14, 2016, 09:53:49 pm

Quote from: Carol & Scott – February 14, 2016, 09:39:09 pm

Turned key - Amber light blinking, No Aux. Comp to vacate air in bladder. Amber light became solid - indicating that the bladder was deflated. Carol pressed button to retract. Hyd. pump started, the slide did not move.

Sorry I have not been clear.

I just wanted to make sure I'd read the sequence correctly (never assume, ya know

)

Need to do some digging into why the controller would have thought the bladder was already deflated... I thought there was a vacuum level that had to be met for that interlock to be made. (wondering if there is a solenoid valve in the system that should have opened and didn't, but then corrected itself. Would start looking at the slide bladder manifold and the HWH schematic related to it.....)

Re: Slide retract problem - Aux. Comp?

Reply #12 – February 14, 2016, 09:56:57 pm

Mike and Molly had the same problem on their 2001 a few years ago; I'm trying to find their solution Slide air seal doesn't deflate - (now it does)

ETA here is George Stoltz' topic they mention Need more input on slide problem George's appears to have been related to the slide manifold.

Re: Slide retract problem - Aux. Comp?

Reply #13 – February 14, 2016, 09:59:19 pm

Thanks Michelle -

In looking at "Trouble shooting HWH 2000 Series - Room Functions - M195.7290 -

Looks like the problem may be: Air Seal Solenoid or Vacuum Solenoid. Don't know how to check functionality or where this assembly is located. My guess is that one or both of the solenoids need attention - however......?

I will try to locate in the basement tomorrow.

Thoughts?

Re: Slide retract problem - Aux. Comp?

Reply #14 – February 14, 2016, 10:09:32 pm

Quote from: Carol & Scott – February 14, 2016, 09:59:19 pm

Looks like the problem may be: Air Seal Solenoid or Vacuum Solenoid. Don't know how to check functionality or where this assembly is located. My guess is that one or both of the solenoids need attention - however......?

I will try to locate in the basement tomorrow.

The manifold should look something like the one in this post (although the gauges shown are not OEM so you most likely won't have them) Emergency '03 slide bladder repair

Re: Slide retract problem - Aux. Comp?

Reply #15 – February 14, 2016, 10:16:25 pm

"Mike and Molly had the same problem on their 2001 a few years ago; I'm trying to find their solution Slide air seal doesn't deflate - (now it does" (I would have done the Quote thing but don't know how it works.)

Interesting read and thanks for the link. I turned off the air line last year when our BR bladder sprung a leak. I'll look for that configuration again and sniff around again.

I have an Air Seal Connection Diagram. No Doc. #.

Re: Slide retract problem - Aux. Comp?

Reply #16 – February 14, 2016, 10:26:05 pm

For an '02 (and maybe others) the blinking yellow light is driven by a 30 second timer - there is no vacuum sensor to indicate the bladder actually has been is deflated - though it takes very little vacuum to do so. If there is no air pressure for the venturi then there is no vacuum created.

Jim

Re: Slide retract problem - Aux. Comp?

Reply #17 – February 14, 2016, 10:31:00 pm

Hey Jim -

I do not understand the term: Venturi? What is this?

Thanks.

Re: Slide retract problem - Aux. Comp?

Reply #18 – February 14, 2016, 10:44:08 pm

A venturi is an air driven restriction that creates a vacuum. On my '02 it is located high and to the right in the driver's side second basement compartment - just in front of the slide hydraulic pump. You can hear the air passing through it as it generates the vacuum for the slide seal deflation.

Jim

Re: Slide retract problem - Aux. Comp?

Reply #19 – February 14, 2016, 10:45:42 pm

Scott, a venturi vent is a variety of things. In this case, compressed air passes over a hole (vent) in a connection to the bladder. The passing of air over the vent causes a lower pressure in the connection to the bladder which evacuates the air in the bladder. In the 01's there is a timer in this circuit. When the timer times out, yellow light comes on and valve in the bladder line closes to hold the low pressure in the valve. In later models there is an actual pressure gauge, when the pressure gets low, the loght comes on and the valve closes.

Pressureized air comes from the aux compressor or from engine air. That is why the bladder will deflate if there is engine air and no aux compressed air.. You may have to start the coach and let it air up for this to work that way.

Check the aux air compressor fuse or the HWH circuits that energize the bladder deflate control valves. They seem to be working so best guess is power to the compressor or the pressure regulator switch.

Re: Slide retract problem - Aux. Comp?

Reply #20 – February 14, 2016, 11:27:54 pm

Thanks Guys -

So I guess the next question might be:

When the key is turned where does that signal specifically go.

Have been searching the HWH web site for diagrams but haven't found the wiring diagram yet that shows electrical from the key switch to

??

Will check coach 12V diagrams tomorrow.

Re: Slide retract problem - Aux. Comp?

Reply #21 – February 15, 2016, 11:02:18 am

In our case it was a bad pressure switch at the aux compressor. Once we learned we could do everything with the main compressor, we dropped the issue until our next trip to Nac, about six months later.

Keith Risch at MOT found and fixed the problem. Sorry I didn't post when it was fixed, just forgot.

Michelle never forgets.

Re: Slide retract problem - Aux. Comp?

Reply #22 – February 15, 2016, 11:10:03 am

Thanks Mike - We will keep that in mind.

Re: Slide retract problem - Aux. Comp?

Reply #23 – February 15, 2016, 12:01:41 pm

Quote from: Jim Frerichs – February 14, 2016, 07:45:48 pm

take off the "U" shaped cover from the auxiliary air pressure regulator (behind the compressor) and manually push the contacts together downward to see if the compressor will come on.

Did you try this Scott?

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