Rinnai Q85SN Installation & Service Instructions Manual page 70

16.2.3
no temperature
difference between
supply (3) and
return (4)
boiler has not been
able to ignite any gas
or has not received any
gas
check whether:
- the gas valve is
open;
- there is power to the
gas valve;
- that the gas valve
opens
70
Error 02
check the data
in Error mode
1 error
2 operational
status
3 supply temp.
4 return temp.
5 kW burner
6 % pump
boiler tries to start
6 times with an
increasing starting
load after the safety
time
the minimum gas
preliminary pressure
during the start must
be a minimum of 7"W.
C. (17 mbar), check
the 24 Volts in the gas
during ignition block's
open position
no flame formation
boiler data during error
1 = 02
2 = 02
3 = xx*
4 = xx*
5 = xx**
6 = xx*
* = variable value
**= x 3451 = BTU/hr
due to insufficient
ionisation the burner
has gone out after
ignition
the minimum
ionisation flow should
be 4 µA, the O should
2
be 4.7 %
there is a temperature
difference between
supply (3) and
return (4)
boiler has gone out
after ignition
ionisation flow,
ionisation cable or the
O setting
2