Baxi Combi 224 Installation And Service Manual page 67

Group Specific Description
code code
E:01 .04 5 x flame loss in 24 hours with
burner on
E:01 .11 Incorrect fan speed
E:01 .12 Temperature measured by re­
turn sensor greater than flow
sensor
E:01 .17 No circulation
E:01 .20 Maximum flue gas temperature
reached (> 140 Deg C)
E:02 .00 Boiler reset in progress
E:02 .07 Low system water pressure
E:02 .16 On board CSU time-out
E:02 .17 Permanent loss of communica­
tion between gas valve and boil­
er PCB
E:02 .19 Jumper 1 changed
E:02 .20 Jumper 2 changed
7696317 - 1 - 21032018
Probable cause
No ionization current
External draught over the boiler
Defective gas/air unit
Bad connection
Sensor fault
Sensor not or badly connected
Water circulation direction re­
versed
Flow and return pipes reversed
No circulation
Sensor not or badly connected
Sensor fault
No circulation
Sensor fault
Reset button pushed
Water leak on boiler
Water leak on system
Check PCB for damage
Fault in air/gas unit
Loose connection to gas valve
Check position of jumper 1
Check position of jumper 2
11 Troubleshooting
Check/Reason
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 unit
Check that the air inlet and flue
gas discharge flues are not
blocked
Check that there is no recircula­
tion of flue gases
Check for adequate draw on the
chimney connection
Check the gas/air unit and re­
place if necessary
Replace the sensor if necessary
Check the circulation (direction,
pump, valves)
Check that the sensors are oper­
ating correctly
Check that the sensor has been
correctly fitted
Check pipework configuration
Vent the air in the heating sys­
tem
Check the water pressure
Check the wiring
Check the circulation (direction,
pump, valves)
Check the cleanliness of the
heat exchanger
Check that the sensors are oper­
ating correctly
Check that the sensor has been
correctly fitted
Replace the sensor if necessary
Vent the air in the heating sys­
tem
Check the water pressure
Check the wiring
Check the circulation (direction,
pump, valves)
Check the cleanliness of the
heat exchanger
Check that the sensors are oper­
ating correctly
Check that the sensor has been
correctly fitted
Replace the sensor if necessary
Boiler carrying out reset (Infor­
mation only)
Check boiler
Check system
Repressurise system
Replace the PCB if necessary
Replace air/gas unit
Check gas valve connection
from PCB
Put jumper 1 to the off position
Put jumper 2 to the off position
67