Hi all, any experts on Marvair / Seamach A/C units lurking here?
Scenario: I have 2 x 16,000 BTU units on my boat
which share a single
has been on the hard
for a few years and I re-commissioned her a few weeks ago.
Forward unit runs like a champ, aft unit wasn't getting cold and kept tripping the breaker when turned on. Sometimes, it would eventually run, but didn't seem to be getting very cold.
Had an A/C tech look at it and he determined that the low side of the system had an abnormally high pressure, so he let out quite a bit of the R22 (legally of course
) and the vapour pressure dropped and it started making cold again and seemed to be running reasonably normally.
Situation now is that the unit runs and gets cold nicely once it's been persuaded to start up. Lots of sweat on the evaporator and gets reasonably cold.
From a dark start, the compressor
makes a noise
like it's trying to run (like 'mmmmmmmmm') then some safety
device cuts in after only 3-4 seconds. There's a noise
like '...TOK...' as it does so.
Then it tries the cycle again between 4 and 8 times and (usually) starts up then runs normally.
I don't think it can be the motor
overheat protection that the tech mentioned as the motor
is still cold at that point.
I'm thinking maybe a motor capacitor, but I don't even know where to look for that.
The tech told me to basically put it in the skip and buy a new one, but at $2K+, that's not really an option at the moment. Plus I would have to change out the control panels
For reference, the unit is SPB16RCBL manufactured by Airxcel vintage approx 2006.
Can anyone give me any useful pointers ?