Do you know if this relief is mechanical or electrical? Do you know with certainty?
A couple more photos (it's still in my landrover, so no real action yet) -
Best start a new thread "how do I get a compressor out of my Land Rover"
If the auto/off/hand switch was in anything other than “off” you would have probably been energising the solenoid when you pushed the contactor in through the auxiliary contact C1.It's out of the landrover now.
I actually took it around a friend's to try running it up on his rotary phase converter. Sounded (for a few seconds) like a bag of spanners and then his rotary converter tripped.
This isn't alarming as it won't run his (larger) compressor anyway, so I reckon it was just overloaded and the wave form went ropey - it spun up fine when I was shown it before purchase.
Anyway....
It's here now and I've been poking at the electrics, however, I've realized -
When it was demod (by pressing the contactor to start the motor) the motor spun up fine, and the pressure built, then went into the red, then backed off.
This is nothing to do with the electrics though - there was an open air output, so this is something mechanical on the output. It can't be anything to do with the electrics at all.
So now I'm trying to work out what would match with these symptoms.
Nothing on the "troubleshooting" on the manual seems immediately obvious, but there must be something stopping the air comming out!
If the auto/off/hand switch was in anything other than “off” you would have probably been energising the solenoid when you pushed the contactor in through the auxiliary contact C1.
If it was “off” then it must have been something else, but it’s a possibility at least.
I’m not sure I’d read much into the wire that’s used, they’ve probably just lashed it with whatever was to hand…
I can only see the solenoid being some sort of unloader valve, I’d assume it needs one to prevent starting under load and the wiring diagrams seems to show it operating as such.
I wouldn’t know enough to say about the solenoid for sure - but maybe it just allows air to recirculate somewhere rather than venting it? With the wiring looking like it’s been messed around with you could maybe disconnect it completely and put a switch across it and the control supply to see what it does when operated?Thats what i mean -
I cant see anything electronic that would stop air being output if the motor was spinning, other than that valve venting - and then i think you would know about it?
I wouldn’t know enough to say about the solenoid for sure - but maybe it just allows air to recirculate somewhere rather than venting it? With the wiring looking like it’s been messed around with you could maybe disconnect it completely and put a switch across it and the control supply to see what it does when operated?
It may well be that its mammaries skywards and does nothing? Looks like it “should” be doing something…
I binned a 24v ac transformer that came out of an old control panel that we redid a few weeks back, thinking I’d never use itThis was my plan using my friends rotary converter, but, after id stuffed it once, i was not as enthusiastic. And it was still in the back of the landrover with poor access.
I was all set to power with 1ph to run the control stuff, but the transformer wont (as far as i can tell) output 24v with 240v and neutral. This stuff hurts my head at best of times.
Its marked -
0
380v
415v
and wired for 0 and 415
I then dug out a 24v stand along psu... and remembered it was DC output and not AC.
The number of 24v transformers that i must have thrown out in the past... but i guess ive not needed one until now.
I might just spin up the motor with the VFD and see what happens!