Recently I have just joined the forum. I posted earlier about a harmonic issue with same chiller. The vsd on this machine originally failed. I then replaced the vsd to find that the logic filter board also took a hit and was bad. Now 1 week later after chiller was back online. My optiview control panel keeps coming in and out. It will load up go through all the pre steps and when it goes to load the main screen it goes completely black. Im thinking the power supply module may be bad. Any help would be appreciated.