I was handed an older pc2001 vario with a cvc 2000 controller. The pump itself does not start up (assuming I am attempting to start it correctly); instead I see a spinning circle on the controller and nothing happens. Before I get into testing the circuits; are there known fault points out there for these devices? Anyone ever come across schematics for these? Thanks for any help.
I assume you’ve looked at the manual extensively? It’s pretty complete from my quick scan:
5519L-VAC-PUMP.pdf (1.1 MB)
There is a soldered lone fuse inside. Check it and let resolder a new fuse on.
Thanks @SidViscous and @spdking! The fuse inside was actually missing; clearly I’m not the first to attempt this. After replacing I’m still not seeing voltage at the motor. Here’s what I can make of it so far:
- There are 2 circuit boards in play; the lower looks to be a controller for the cvc2000 and the upper board in the pump head seems to be a 24v 5a driver for the pump motor.
- I have replaced the fuse in the pump head but no change.
- I do not appear to have a solid 24v signal from the lower controller circuit to the upper pump head driver circuit.
My current direction is tracing the board to figure out where the 120v ac → 24v dc is breaking down.
@dp621 i had the Same problem with a Vaccubrand pump stand. Have you checked how expensive the spare parts are already? i Ended up selling it and got a KNF pump stand for which spares are a fraction of what Fisher sci. charges which is the only distributor of vaccubrand spares in my country.
What kind of motor is it? If it’s 24vdc it’s likely a stepper and you won’t really be able to see voltage unless you use an oscilloscope.
ah, that makes sense! I was seeing a variable voltage on that signal; must be pwm.
And yes, its a 24vdc motor. I had to put it down for a few hours but when I get back to it tonight I’ll try driving the motor directly to see if that is the problem. Thank you for this info; this plus what I’m seeing on the multimeter is shining more light.
Thanks @y_tho. I found a price listing page here for some parts:
If I can identify which part needs to be replaced I will pull the trigger on ordering. (Even better if I can identify and replace a component directly myself instead of buying a new board)
For those at the edge of their seats, I finally got back to this. Issue seems to be a fried power supply board via some component failures (notably what looks like a bloated diode at D8 on the board and a charred underside):
Appears to be part number (though I haven’t located this number on the board yet):
I was able to get the pump to kick on briefly but I couldn’t find a supply on hand with enough amps. Going to grab a slightly larger power supply to test before I either build a circuit or take a plunge on a replacement part.
Look at the soldering on left. Are they all contacted and connected by poor solder material?
Replace the whole board, for sure.
It’ll just keep fuckin up otherwise.
I can finally rest knowing this pump is working!! Thank you everyone for the direction, heres what I ended up doing:
The replacement power supply board was listed as a replacement cost of $813.16. From deciphering the circuit and following the rest of the board schematics; I was pretty confident that this power was simply a 120v/220v ac to 24v dc converter. After I was able to confirm this suspicion by powering the pump directly from 24vdc, I looked around for a compact power supply as a replacement for the stock part. Here I found this gem on amazon:
At a replacement cost of $19.99 vs $813.16 it was a no brainer. Here is a picture of both power supplies. The new one is on top, the original one on the bottom:
For the record, I do not recommend anyone run this long term as I have not had enough time to test the pump but all features of the pump are now working!! I can report back on long term use if it is of interest but if anyone is looking to get a broken vario pump working, definitely take a look at the power supply board.
Awesome work @dp621 this was a fun thread to follow congrats on the resurrection!
Killer good troubleshooting! Well done!