Did you know? “LLO” stands for Local Lockout.
This is a standard feature with PolyScience Chillers and Circulators with Standard, Digital and Programmable Controllers (manufactured 2006 to present), which protects it from accidental or unauthorized changes. To set the LLO feature: press and hold the Select/Set knob on the front of the unit for about 5-6 seconds. The LLO message will then appear on the display and unauthorized or accidental set point changes will be prevented. 
To deactivated this feature; press and hold the Select/Set knob for about 5-6 seconds or until you see LLO message change to “CAn,” which stands for “Cancel Local Lockout.” After this, the user may now make any changes they need with the unit.
For more on Local Lockout, watch this video.
