We have a cruisair
12k btu and 16k btu unit is installed on our catamaran
. The system as a whole worked perfectly well since we got the boat
in April, but that’s changed the past few weeks. The 12k system is now having issues.
The first issue we had was with the breaker tripping for the aft cabin
AC. The first time it flipped off, we turned it back on and it ran fine for a little while, then started switching off after only a minute or two, then tripping immediately. We saw that the breaker capacity on that line was too low for the load, a 15 amp breaker when the minimum suggested was 20. We replaced it with a 25 and it seemed to fix the problem. May not be connected, but I don’t know.
Last night, I noticed that it wasn’t as cool as usual with the AC on. When I listened for the compressor
to turn on, I heard it make the initial quieter hum that it does as it prepares to kick in, but then it just shut off instead of cycling up. This happened about once every minute or two, and I could tell it was trying to turn on, but something was stopping it. So I turned the lower AC off from the control panel
, but that started VERY loud buzzing noise
coming from the pump
relay box in the hallway I turned the system back to “cool”, and the buzzing stopped, but the AC still could not kick on. I hit “off” again and the loud buzzing noise
came back. We determined it was coming from the pump
controller. I intended to hit the “cool” button again to make the noise stop, but accidentally hit “off” again. That stopped everything. And here we are.
I have purchased a clamp amp meter to try to evaluate the compressor
but was wondering if anyone else had ideas.
The water pump
is shared between the two units and the second unit is functioning normally.