As soon as the newly installed chiller starts-up the reception on AM radio signal disppears for appx. 5-6 blocks. The 200Ton chiller is equipped with harmonic filter. Equipment manufac. has replaced all circuit boards, the SCR panel, installed isolation transformer, chokes around the cables...
The 600Ton Chiller#1 compressor motor failed. Discovered SCRs show sign of meltdown. Compressor motor was meggered and read Zero ohm on 480V 3-phase delta winding. Shortley after the back-up chiller#2 experienced same type failure. During both events chiller controls did not cause system...
