The lists several alarm codes on the display. Here is how to interpret them:
Supports NTC temperature probes, 4-20mA, and 0-10V analogue inputs. Mounting: Designed for standard 32x74mm panel mounting. eliwell sb655 c manual
Uses a "Copy Card" or "Multi Function Key" (MFK) for quick parameter uploads/downloads. The lists several alarm codes on the display
: Features automatic summer-winter changeover and supports Free Cooling/Free Heating . eliwell sb655 c manual