Rinnai Q85SN Installation & Service Instructions Manual page 81

16.2.15 Error 31
internal shut down of supply sensor T1
check the data
in Error mode
boiler data during error
1 error
2 operational
status
3 supply temp.
4 return temp.
5 kW burner
6 % pump
check the wiring
check the wiring for the sensor
the wiring is OK
but the error is
repeated
remove the plug from the flow sensor as a
result of which Error 36 occurs
replace the
sensor
1 = 31
2 = 00
3 = 230
4 = xx*
5 = 00**
6 = xx*
* = variable value
**= x3415=BTH/hr
81