(Kansas City, MO, USA)
In automatic and manual, the compressor will not start, saying it is waiting for blowdown.
The manual says the sump pressure is too high, the indication is around 15 pounds. It seems like the blowdown is working, but we might have a check valve leaking back, and potentially a pressure detection issue.
With the discharge valve close, we can get pressure down to 6 pounds.
I wonder if we should take the check valve out and try to clean it up? Any other advice would be great.
Sullair waiting for blowdown
Any particular model you’re dealing with?
Model and repair outcome
It is a Sullair Model 7507, we had it serviced and they replaced the pressure transducer P1 and rebuilt the MPV.
by: Doug in s.d.ca.
So, did that rebuild and transducer fix it, or was that before you first wrote?
Have you checked the check valve, too?
Help on 7507
Jeff did you figure out why is was saying waiting for blow down I am having the same issue
It was a bad P1
The pressure transducer P1 was bad, and we had some leak back from the air system.
Hey Jeff, thanks for taking the time to come back and reply to Dustin.
It’s great when my site works the way it’s supposed to… compressor folks helping other compressor users.