Geo-Flo Products Corp. has published Technical Bulletin TB150908 regarding the UPC GEO Pump Controller. Read the summary below and download the complete bulletin for full details Contact Geo-Flo for further information.
Summary: In some cases, the UPC GEO pump controller can be affected by transient or stray voltages on the secondary voltage (24VAC) supplied by the heat pump. In rare instances where this situation has occurred, a wall transformer may be installed to isolate the controller from the heat pump controls. In addition, grounding should be verified.
TB150908-UPC-GEO-Controller.pdf - 1023 kB