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HWH air compressor control wiring question

I'm trying to correct my wiring of the relay and related pressure switches that are all tied together for the Aux air compressor.

Anyone have any wiring diagrams or pictures of how this all gets wired? The CC binders are no help.

Mine only works with the key on so as it uses air overnight the compressor never turns on to keep the tank full. The wiring is disconnected from one pressure switch, I'm sure that's the issue.

Thanks
2004 Magna 42' 3 slide Chalet CC#6315M
C-15, 515HP 1650tq.

Re: HWH air compressor control wiring question

Reply #1 –
I assume when you say auxiliary air compressor you are describing the small air compressor in the forward bay under the driver's seat.  If this is the case, that compressor is only used to maintain the leveling system when you are parked.  After auto leveling, the HWH control system goes to sleep after the coach is leveled and then wakes up about once an hour and if needed activates the pump to relevel the coach.

For this repeating sequence to happen the HWH leveling system must be left on after it has gone through the initial automatic leveling sequence.

Are you using the HWH system to auto level the coach when you first park?  And if so, are you leaving the system turned on?
Pete
 2000 40'  Magna #5892  CAT C-10

Re: HWH air compressor control wiring question

Reply #2 –
Check with Kevin Waite. 541-953-6162

Re: HWH air compressor control wiring question

Reply #3 –
My compressor will come on when the Key is on but not when the key is off and with the HWH on.
I know the issue is the wire that's not connected needs to be hooked up the the Solenoid battery+ then go to the pressure switch then to Solenoid coil+. That will then turn on the compressor when the tank get to 60 psi and shut off around 90-100.
The wire that is not connected has 2ea ring terminals that match the size of the respective studs.

I would just fell more comfortable verifying this first.

If it was a normal coil connection I'd have done it but it has a circuit board on it with 3 wires that go to the other Solenoids and the HWH control.

I do have pictures I could post if I could...not sure how.



2004 Magna 42' 3 slide Chalet CC#6315M
C-15, 515HP 1650tq.

Re: HWH air compressor control wiring question

Reply #4 –
Also shouldn't I get notification of reply's?
2004 Magna 42' 3 slide Chalet CC#6315M
C-15, 515HP 1650tq.

Re: HWH air compressor control wiring question

Reply #5 –
A few pictures showing the relay part # and the circuit board and the wire that isn't attached.
maybe that will help.
2004 Magna 42' 3 slide Chalet CC#6315M
C-15, 515HP 1650tq.

Re: HWH air compressor control wiring question

Reply #6 –
So all the HWH literature shows a pressure 85psi cutoff,  but I  have a 115psi one. So compressor  will run till that's reached +-.

 I wired up the wire and now it will run with the key off.

So started at 5psi, ran engine to 110psi and during this time the aux comp also ran also. I turned off the engine at 110psi and the aux compressor ran till 117psi and then it stopped. Went out and Comp is hot and 20 amp fuse is blown again.

Trying to run past 100 psi just overheats the compressor and pops the fuse, that's what will eventually kill it.

These compressor are rated 100psi max! Should never be driven to 100psi IMO.

Also the motor really needs a 30amp fuse..TA-4101-DC has 28 amps full load.

 So I'm going to find a 85psi N/C pressure switch and change it out.
2004 Magna 42' 3 slide Chalet CC#6315M
C-15, 515HP 1650tq.

Re: HWH air compressor control wiring question

Reply #7 –
Got a new pressure switch and all works as it should.
I took a amp reading and as I thought the compressor draws upwards of 27amps as it reaches 90psi.
Replaced the inline fuse with a 30amp. Compressor running cool.
2004 Magna 42' 3 slide Chalet CC#6315M
C-15, 515HP 1650tq.