Installation - Error CodesError Code Prog Non-Prog HW01 Comm Connection link failure Comm Connection link failure Comm Connection link failure02 Floor sensor: overheated or overcooled Floor sensor: overheated or overcooled Comm Connection link failure03 Floor sensor open Floor sensor open -04 Floor sensor short Floor sensor short -05 Prog/Non-prog/HW thermostat lost Prog/Non-prog/HW thermostat lost HW lost link with Coordinatorlink with Coordinator (Displayed link with Coordinator (Displayedon related Thermostat) Comm on related Thermostat) CommConnection link failure Connection link failure06 Prog/Non-prog/HW thermostat Prog/Non-prog/HW thermostat HW lost link with WClost link with WC lost link with WC(Displayed on related Thermostat) (Displayed on related Thermostat)07 Prog/Non-prog Thermostat Prog/Non-prog Thermostat -lost link with TRV lost link with TRV(Displayed on related Thermostat) (Displayed on related Thermostat)08 Prog/Non-prog Thermostat Prog/Non-prog Thermostat -lost link with Receiver RX 1 lost link with Receiver RX 1(Displayed on related Thermostat) (Displayed on related Thermostat)09 Prog/Non-prog Thermostat Prog/Non-prog Thermostat -lost link with Receiver RX 2 lost link with Receiver RX 2(Displayed on related Thermostat) (Displayed on related Thermostat)If there is more than 1 error, then on Error page, press UP to show other error codes.e.g. Err 03 05 ===> 3 errors Error code 05 ( 1st one )Press Up to show Err 03 08 ===> 3 errors Error code 08 ( 2nd one )Press Up again to show Err 03 09 ===> 3 errors Error code 09 ( 3rd one )Press Up again to show Err 03 05 again......Press OK to exit Error page back to Home display.62 VS20WRF and VS20BRF Installer Manual