RT510+ Series Boiler Plus Compliant Thermostat | 5.10. Temperature Out Of Range - Hi & Lo | Help Center
5.10. Temperature out of range - Hi & Lo
Temperature Outside Operating Range
RT510RF : Temperatures Outside Operating Range (5.10.1) . Description : Temperatures below 10 °C are displayed without the leading ‘0’. Temperatures exceeding the measurable range will be indicated by ‘HI’ for ...