Baxi LUNA DUO-TEC 1.70 User Manual page 49

No flame during
Su:22
operation
Internal error on the
Su:25
(1)
SU-PCb
Su:29 tFG sensor above maximum
(2)
setpoint
No tFG sensor connected /
Su:30
(2)
shorted Boiler stop
after 5 times tF>tF Max:
Su:33
controlled stop
after 5 times tFG>tfmax:
Su:34
(2)
controlled stop
Insufficient gradient on
Su:35 T1(supply) or T2(return) after
burner starts
(1) These lock-outs are not stored in the fault memory
(2) tFG : flue gas sensor
No ionization current
---
Non-existent or insufficient water
circulation / sensor error
Flue high limit disconnected /
Sensor error
Non-existent or insufficient
circulation / sensor error
Non-existent or insufficient
circulation / sensor error
Non-existent or insufficient
circulation / sensor error
49
Purge the gas supply to remove air
Check that the gas valve is fully opened
Check the supply pressure
Check the operation and setting of the gas valve
Check that the air inlet and exhaust flue are not
blocked
Check that there is no recirculation of
combustion gases
Replace the SU PCB
Replace the flue high limit.
Check the circulation (direction, pump,valves)
Check the water pressure
Check that the sensors are operating correctly
Check that the sensor has been correctly fitted
Check the cleanliness of the heat exchanger
Replace the flue high limit.
Replace the supply sensor.
Check the circulation (direction, pump,valves)
Check the water pressure
Check that the sensors are operating correctly
Check that the sensor has been correctly fitted
Check the cleanliness of the heat exchanger
Replace the flue high limit.
Check the circulation (direction, pump,valves)
Check the water pressure
Check that the sensors are operating correctly
Check that the sensor has been correctly fitted
Check the cleanliness of the heat exchanger
Check the circulation (direction, pump,valves)
Check the water pressure
Check that the sensors are operating correctly
Check that the sensor has been correctly fitted
Check the cleanliness of the heat exchanger
7703477.01 (1-03/18)