18.0 Fault Finding

Domestic Hot Water - Follow operational sequence

Turn selector switch to The display illuminates

NO

Go to section ‘A’

YES

Error 110 flashing

YES

 

Error 133 flashing

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

Error 20, 28 or 50 flashing

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

Error 119 flashing

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn Domestic Hot Water

 

 

thermostat to Maximum.

 

 

Open DHW tap fully.

 

 

DHW Hall Effect sensor

NO

 

operated (red neon on the

 

 

 

 

 

sensor illuminated

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

NO

 

3-way valve is open to

 

Domestic Hot Water circuit

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

Pump runs

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

NO

 

Fan runs

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

NO

 

Fan runs at correct speed

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Spark at ignition electrodes for

NO

 

up to 5 seconds and for 3

 

 

 

 

attempts

 

 

 

 

 

 

 

 

 

 

YES

NO

 

 

 

 

 

 

 

 

YES

Burner lights

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

NO

 

 

 

 

 

 

 

Burner output modulates to

 

 

 

maintain the temperature set

 

 

 

 

 

 

 

 

YES

 

 

NO

 

 

 

 

 

 

 

 

 

 

Close DHW tap

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

DHW flow sensor senses no

YES

flow. Burner goes out

 

 

Turn the selector switch to

YES

 

reset position for 5 seconds

 

 

 

 

 

 

 

 

 

 

 

Go to section ‘E’

 

 

 

 

 

 

 

 

 

 

 

Go to section ‘C’

 

 

 

 

YES

 

 

 

DHW flow rate more than 2

 

l/min

 

 

 

 

 

 

 

 

 

 

 

Go to section ‘K’

 

 

 

 

 

 

 

 

 

 

 

Error 125 flashing

 

 

 

Go to section ‘B’

 

 

 

 

 

 

 

 

 

 

 

Error 160 flashing

 

 

 

Go to section ‘D’

 

 

 

 

 

 

 

 

 

 

 

Error 160 flashing

 

 

 

Go to section ‘L’

 

 

 

 

YES

 

 

 

Error 133 flashing

 

 

 

 

 

 

 

 

 

 

 

 

Go to section ‘F’

 

 

 

 

YES

 

 

 

 

Burner does not stay alights

 

after 5 seconds

NO

 

 

 

 

 

Reduce DHW flow rate

 

 

 

 

Burner modulates

 

 

 

 

 

 

 

 

 

 

 

Error 130 flashing

 

 

 

Go to section ‘M’

 

 

 

 

YES

 

 

 

Fan stops after 10 seconds

If the error 110 is still flashing.

Go to section ‘J’

Go to section ‘B’

YES

Is mains water filter and

assembly clean?

Is the magnetic detector free

to move in the Hall Effect

sensor

Go to section ‘H’

Turn the selector switch to the

reset position for 5 seconds

Error 133 flashing

Go to section ‘I’

Clean DHW NTC sensor and DHW heat exchanger

YES

Pump runs for 30 seconds

Operation sequence

successful

54© Baxi Heating UK Ltd 2008

Page 54
Image 54
Baxi Potterton Gold HE A Range Domestic Hot Water Follow operational sequence, Error 110 flashing, Turn Domestic Hot Water