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Domestic Hot Water - Follow operational sequence
Turn on mains power
The display illuminates
YES
09, 15, 110, 125, 133, 134,
135 or 384 flashing
NO
20, 28, 40 or 321 flashing
NO
117 or 118 flashing
NO
Set Hot Water temperature to
Maximum & fully open hot tap.
symbol flashing, pump runs
YES
Fan runs after up to 3 minutes
YES
Fan runs at correct speed
NO
Spark at ignition electrodes up
to 5 seconds & for 3 attempts
YES
NO
Burner lights
YES
109 flashing
NO
110 flashing
NO
3 Way Valve open to
Domestic Hot Water circuit
YES
Burner modulates to maintain
set temperature
NO
130 flashing
NO
Burner goes out
48
© Baxi Heating UK Ltd 2017
NO
Go to section 'A'
YES
Press the reset button for 1 to
3 seconds
YES
Go to section 'D'
YES
Go to section 'I'
NO
DHW flow rate greater than
NO
2litres/min
NO
160 flashing
Go to section 'C'
160 flashing
NO
Go to section 'C'
NO
133 flashing
Go to section 'E'
YES
Burner goes out after 5
seconds
YES
125 flashing after 1 min
YES
Go to section 'H'
NO
Go to section 'K'
NO
Check CH NTC sensor.
Go to section 'D'
YES
Go to section 'M'
YES
Fan stops after 10 seconds
17.0 Fault Finding
If
regularly, check all PCB connections. If this has no
If
110 is still flashing go to
section 'H'
Go to section 'L'
NO
YES
Burner lights
YES
YES
Go to section 'F'. Press the
reset button for 1 to 3 seconds
YES
133 flashing
Go to section 'G'
Go to section 'J'
YES
Boiler operation correct
09, 15, 110 or 384 is flashing or re-occurs
effect replace the PCB.
Go to section 'L'
Go to section 'B'
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