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17.0 Fault Finding
50
© Baxi Heating UK Ltd 2011
Mains On
LED Light
(Green)
Boiler On
LED Light
(Green)
Lockout
LED Light
(Red)
Live & Neutral Reversed
Incoming Live and Neutral
reversed.
Go to Ignition Lockout section
of the fault finding instructions.
Go to Fan Lockout
section of the fault finding
instructions.
Go to Thermistor section
of the fault finding
instructions.
Low Electrical Supply
Incoming Voltage less than
180V. Check System
Controls & System Wiring.
Otherwise contact Electricity
Provider.
LV Wiring Harness
Ensure the small 8 way
connector is securely plugged
into the PCB. If the fault
persists replace wiring harness.
PCB Fault
Replace PCB.
PCB Fault
Replace PCB.
PCB Fault
Replace PCB.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Go to Electrical Supply
section of the fault finding
instructions.
Go to Dry-Fire
section of the fault finding
instructions.
Go to Overheat Lockout
section of the fault finding
instructions.
NOTE: The fan is supplied with 325 Vdc.
Fan Fault Finding should only be carried out after the
boiler has been electrically isolated.
General Fault Finding should only be carried out by
someone who is appropriately qualified.
Lights
Off Off Off
Lights
Off On
*
Lights
On
*
*
Lights
On Off On
Lights
On Off on
Lights
On on onn
Lights
On On
*
Lights
Off onn
*
Lights
On On On
Lights
On onn
*
Lights
On On
*
Lights
On On onn
Go to Condensate Pump
section of the fault finding
instructions.
YES
Lights
On
*
*
denotes LED flashing
*
*
*
*
*
*
*