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Baxi Luna HT Troubleshooting Guide
Low Water Cut-off Pressure
E119
Switch Activating
NOTES:
Flue Gas Temperature
E130
Sensor/ Air Pressure Switch
NOTES:
E133
Burner Lockout
1-
Ensure all air is purged from the system and all shutoff valves are open
2-
Check boiler and system for leaks
3-
Ensure the pressure in the expansion tank is 11.6 psi
4-
Fill the system between 1 and 1.5 bar on the pressure gauge.
5-
If an E119 error code persists jump the leads on the low water cutoff. If the boiler
fires up change the low water cutoff switch.
If unit can be reset (Pressure Switch Activated)
1-
Check for obstructions in the venting and termination
2-
Ensure the venting is within the maximum venting length requirements
3-
Make sure there is water in the condensate trap
4-
Check that the proper QAA73 parameter values have been adjusted with respect to
gas type, venting length and altitude. Refer to installation manual for values
5-
Check the silicone tubes coming from the air pressure switch for kinks, melting and
holes, make sure that the low pressure opening at the back of the unit is not
blocked.
6-
Ensure that there are no loose wires and that the pressure switch is opening and
closing properly
7-
Reset boiler and analyze the combustion gas to ensure the correct CO2 and CO
values. Refer to the installation guide for combustion specifications.
Note: When CO levels are significantly higher than the numbers above the boiler's
specifications it is recycling products of combustion. Check all gasket seals between the flue
and air intake venting connections.
If unit cannot be reset (Flue High Limit has Activated)
1-
The flue high limit has a red manual reset button in the center of the sensor.
2-
Check for obstructions in the venting and termination
3-
Ensure the venting is within the maximum venting length requirements
4-
Check that the proper QAA73 parameter values have been adjusted with respect to
gas type, venting length and altitude. Refer to installation manual for values
5-
Reset boiler and analyze the combustion gas to ensure the correct CO2 and CO
values. Refer to the installation guide for combustion specifications.
Note: When CO levels are significantly higher than the numbers above the boiler's
specifications it is recycling products of combustion. Check all gasket seals between the flue
and air intake venting connections.
No Spark:
1-
Check ground and polarity back to the circuit breaker
2-
Ensure the boiler is on a dedicated circuit
3-
Check for 30 V DC going to the spark generator
If there is voltage to the spark generator change the spark generator. If there is no voltage to
the spark generator change the main control board.
4
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