I an troubleshooting my chiller because I fried my compressor. I have done clues of what could go wrong, but want to discard over voltage. I have a Mitsubishi VFD. That I take 240 and convert to 240 3 phase. But when I measure 1 get 176 and between lines I get 380. But the VFD is program to 240 60 Hz. Do I need a diferent meter?