Riello NexSirius 006 M Instructions For The Installer And The Technical Service Centre page 73

Code Item
35 Disinfection not succesful
36 Configuration mismatch
Temperature/humidity sensor of user
37
interface in zone 2
The parameters displayed in grey are not available.
EN
Cause
Code 133 = 1 or 2 + Disinfection cycle
not completed within time defined
by code 143 or Disinfection cycle not
performed due to error 5.
Outdoor unit should run in cool
mode +
Code 106.5 = 0 or Unit is heat only
Value out of range + Code 105.0 =
1 or 4
73 73
Effect
Domestic hot water is not
produced (unless code 1.3 = 1 or
the diagnostics is removed cycling
power)
Entire system stops
Room temperature/humidity is not
available
Related functions are not available
NExSIRIUS NExSIRIUS
Solution
Check code 140 to 144
Check booster heater operation
Check booster heater wiring and
electrical connections
If code 127 = 2 check backup heater
operation
Check domestic hot water
temperature sensor, wiring and
electrical connections
Modify setting of code 106.5
Modify requested mode
Check user interface wiring and
electrical connections