foxter 0 Posted December 22, 2014 Share Posted December 22, 2014 Hi, I was wondering why I cant hear the PTU sounds soometimes? Sometimes they work during startup/shutdown, but sometimes theres no sound, could anybody explain this please? Thanks alot Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted December 23, 2014 Aerosoft Share Posted December 23, 2014 The PTU only works when there is a difference in pressure between the systems and it needs to equalize. When there is no difference the PTU does not need to do anything. Link to comment Share on other sites More sharing options...
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