48
- Installation & Servicing
FAULT FINDING
FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING FAULT FINDING
Before attempting any electrical fault finding ALWAYS carry out
the preliminary electrical system checks as detailed in the
Instructions for the British Gas Multimeter or other similar
commercially available meter.
The preliminary electrical system checks are the FIRST
electrical checks to be carried out during a fault finding
procedure.
On completion of any service/fault finding task which has
required the breaking and remaking of electrical connections
the following checks MUST be repeated:
a Earth continuity
b Polarity
c Resistance to earth
Detailed instructions on the replacement of faulty components
are contained in the 'Servicing' section of these Installation &
Servicing Instructions.
Before carrying out Fault Finding ensure that all external controls
calling for heat. There should be 230V ± 10% available at the
control box connection.
The boiler control module has replaceable fuses protecting the
230V and 24V circuits. A common reason for the 230V fuse to
blow would be if the pump connected to the boiler was drawing
more than 1 amp.
If the 230V fuse has blown, the display will be blank. Check for
short circuits and pump loads before replacing the fuse.
If the 24V fuse has blow the display will show . Check
for short circuits before replacing the fuse.
Code Description Action
E 00 Flame error Check inlet gas pressure
Check flue for blockage
Check wiring to ignition/detection electrode
Check condition of ignition/detection electrode
E 02 No ignition after restart Check inlet gas pressure
Check flue for blockage
Check wiring to ignition/detection electrode
Check condition of ignition/detection electrode
E 03 Internal failure Check gas valve wiring and rectifying lead
Check gas valve solenoids are not open circuit
Check general wiring harness and connections
If all OK, replace boiler control module
E 04 Non-volatile lockout Press reset
E 05 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
E 06 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
E 07 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
E 08 Air pressure switch not closed (80kW only) Check flue for blockage
Check air pressure switch sensing pipes
Check fan speed
Check air pressure switch & replace if necessary
E 11 EPROM read/write error Replace boiler control module
E 12 Fuse 4AT on MCBA blown Replace fuse 4AT
E 13 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
E 14 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
E 15 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
E 16 Internal failure Check wiring harnesses & connections
If wiring OK replace boiler control module
Boiler Control Module Error Codes
U 1.2
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