26
Fault
Function
Possible cause
Suggestion
37
CH & DHW
CH return temperature
thermistor malfunction
- Call the Rinnai technical assistance center
38
CH & DHW
Exhaust temperature
thermistor malfunction
- Call the Rinnai technical assistance center.
43
CH & DHW
Low pression of the CH
hydraulic circuit
- Check the manometer placed on the frontal panel and
follow the filling instruction.
45
CH & DHW
Drain system blocked
(siphon full)
- Check if the condensation drain system is obstructed.
61
CH & DHW
Combustion fan failure
- Verify that the exhaust system is not obstructed.
- Turn off/on the boiler : if the error code remains, please
call the Rinnai technical assistance service.
64
CH & DHW
Circulation pump failure
- Call the Rinnai technical assistance center
70
CH & DHW
Fault of PCB
- Call the Rinnai technical assistance center
71
CH & DHW
Solenoid gas valve failure
- Press the button CH (or DHW) twice to turn off and on
the function.
-
If the error code remains, please call the Rinnai technical
assistance service.
72
CH & DHW
Water's missing
- Press the button CH (or DHW) twice to turn off and on
the function.
-
If the error code remains, please call the Rinnai technical
assistance center.
89
POWER
SUPPLY
Freezing
- Call the Rinnai technical assistance center.
90
CH & DHW
Abnormal rotation of
combustion fan
- Premere il tasto CH twice to turn off and on the function
96
FUNCTION
TEST.
Problem on internal test of
CH & DHW modes
- Check the DHW/CH taps below the boiler are open;
- Disconnect and reconnect the power cable to repeat the
test procedure.
99
CH & DHW
Obstruction of the flue
system
- Check and clean the flue pipes.
-
Call the Rinnai technical assistance service.
You can see the error code blinking on the Body controller display.
On the Rinnai WiFi thermostat you can see both the error (on the left) and the boiler model (on the
right):
It is necessary to hold down the button
ON
OFF
for a few seconds to restore the boiler’s normal
functioning and cancel the error.
If the error code persists, please call the authorised personnel from Rinnai.
IMPORTANT
Display
(Error code)
(Boiler’s model)
Model
24
29
35
REB-KBI2424FF
REB-KBI2929FF
REB-KBI3535FF