Post edited 8:46 am – July 23, 2011 by SpeeedRacer62

Greetings,

I have a '99 Maxum 3300SCR with a factory installed Marine Air Systems Vector Compact (VCP16K). The control is also the factory installed Marine Air Systems Digital Passport II. My boat is in Virgina where the temps can run from the low 80s up to 100.

For the past few summers we've been spending a lot of time at the dock (gas $$$) so we've had the air running a lot more. The system is great and has run without any problems at all. However just a few days ago I noticed that the unit has a louder "click" when the compressor kicks on. I don't remember it being that loud, almost sounds like its arcing. It "clicks" twice then starts up and runs normally during each cycle. When the cycle ends its quiet as a mouse, no click at all.

I've searched the web site and didn't find anything talking about this subject. Is there a relay or control that I need to look at replacing soon?

Thanks,

Chris

Steve,

Thank you very much for your advice. I started googleing for a picture of the reversing valve after reading your post. During that search I found a manual for a unit like mine and was surprised to find maintenance procedure for the reversing valve. In the manual it stated that on the dual system that you should cycle it to the heat position at least once a month. So I cranked up the thermostat so the heater would kick on. I let it run a minute then cranked it back down. After a few cycles the unit was quiet as a mouse. You can't even hear the reversing valve now.

Thanks again for your help. Excellent web site!

Chris