Hog Slat Inc. Newton Grove, NC USA APRIL 2025 REV A1 24 Ventilation System ================================================================== 21. PROBES: The controller can operate with 1 or up to 4 probes. Select the probes that are connected using the on screen buttons. When icon is pressed the icon will go from gray to green in color. Probes are averaged together to obtain the room temperature. Each probe is monitored in case of error. Anytime a probe error occurs, the remaining probes are averaged. An error indicator “ERR” will illuminate beside the probe that has the fault on the MAIN screen and on the PROBE screen. If only Probe#1 is used and has a fault, controller will illuminate ALARM icon on IDLE and MAIN pages. Controller will operate Stage 1 fan at minimum speed % setting. During ZONE heating, probes 1 and 2 are Zone 1; probes 3 and 4 are Zone 2. The two probes in each zone are averaged, however if either zone were to lose both probes, the controller will indicate ALARM and controller will operate Stage 1 fan at minimum speed % setting.. Heaters will turn off. 21A: SELECT ACTIVE PROBES: Press icon of probe number to be used. Icon will turn green when selected. 21B: TEMPERATURE PROBE ADJUSTEMENT OFFSET: Provides adjustment to the display temperature value. Use for fine tuning only. Offset can be increased or decreased by 0.1 degrees to a maximum of +/-5 degrees. Default is “0” and should only be changed if displayed temperature does not match measured temperature using an external device. When making adjustments, the displayed temperature will update slowly as the data that is displayed is averaged over a period of time for reading stability. Offset adjustment is for minor variations in probes and not intended to correct the reading of a faulty probe. 21A 21B
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