Fault Finding - Potterton Promax FSB 30 HE Installation & Service Instructions Manual

Mains On Boiler On Lockout
LED Light
LED Light LED Light
(Green) (Green) (Red)
denotes LED flashing
*
Lights
Off Off Off
Lights
* Off On
Lights
* * On
Lights
On Off On
Lights
On Off on
*
Lights
On on onn
* *
50
© Baxi Heating UK Limited 2010
Go to Electrical Supply
YES
section of the fault finding
instructions.
Live & Neutral Reversed
YES
Incoming Live and Neutral
reversed.
Go to Dry-Fire
YES
section of the fault finding
instructions.
YES
Go to Ignition Lockout section
of the fault finding instructions.
Go to Overheat Lockout
YES
section of the fault finding
instructions.
Go to Fan Lockout
YES
section of the fault finding
instructions.
17.0

Fault Finding

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
On * On YES
Lights
YES
* Off onn *
Lights
YES
On On On
persists replace wiring harness.
Lights
On onn
* * YES
Lights
YES
* On On
Lights
YES
On On onn
*
Lights
YES
* * On
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
PCB Fault
Replace PCB.
PCB Fault
Replace PCB.
PCB Fault
Replace PCB.
Go to Condensate Pump
section of the fault finding
instructions.