We recently installed an RTAA-125 chiller with remote evaporator bundle inside an equipment room (40' away). Upon startup, we experienced EXP diagnostic failures even though service tests were fine. We were told to increase the wire size to the EXP's, but we'd probably experience intermittent failures. We were then told to relocate the outdoor EXP board inside (closer to the EXP's, less wire length) and add a "Buffer Board".
Has anyone experienced this problem?
Is there an easier way to resolve this?