I'm looking for advice again.
Just today I noticed the water
flow has diminished on the water
discharge of my air conditioner. It's a reverse cycle system about 12,000 BTU. There are no error codes and the unit is still functioning as usual.
It was installed by Anchor Marine
in Tampa years ago, but they were bought out or otherwise out of business.
Weeks ago I read all the documents on board concerning the unit to learn what I could about how it works in preparation for any needed maintenance
. And it seems that time is soon upon me.
The flow path is ..... thru-hull/seacock -> Groco 750 strainer -> March Pump LC-3CP-MD(mag drive) -> AC unit in/out -> above waterline discharge.
Haven't pulled the strainer out yet, but it appears to be fine looking through the clear housing. The top is stuck hard or I'd have it out right now. I can get it out, but just took one shot at it so far.
So, there is a restriction somewhere or the pump output is low. Possible restriction points could be the thru-hull/seacock, intake hose, strainer, input hose, AC unit, output hose, or discharge thru-hull.
I plan to check the intake thru-hull of course, but the boat is docked on a lay wall and I'm always concerned about getting in the water between anything and the boat. I guess I'll have to do it or move the boat to anchor
. Not a problem as I have sailed daily or weekly for a more than a year now.
Also, I could to do a half-split check by disconnecting the pump output and turning it on to observe the output. If normal looking, I'll disconnect at the unit itself to observe the flow there. Maybe there is a kink along the hose path to the unit that is getting clogged. It runs from the starboard side main cabin
thru the head
into the vberth and across to the port side vberth storage
area. The longest hose in the system.
I suppose then I'll check at the output of the unit as well. And finally the output hose to the hull
will be checked. Somewhere along the way something has to be the issue.
I'm still at the physical inspection
stage, but if that doesn't reveal anything I'll proceed in some manner.
So, if you're still reading, here's the questions.
Does this make sense so far?
Would I damage anything if I back flushed the entire system by putting water under pressure into the discharge opening? Specifically the unit itself. And/or maybe the water pump should be out of the loop/bi-passed for any back flushing
Do you have any advice not related to these questions?
I think a recall
one of the four fault/shutdown modes is low water flow, but I need to check that again. It hasn't presented an error code yet. And I've turned the system off pended further head
scratching. I don't want to damage the system.
Thanks for your time and feedback.