Fault Finding - IDEAL imax W45 Installation And Servicing Manual

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
Boiler Control Module Error Codes
Code Description
E 00 Flame error
E 02 No ignition after restart
E 03 Internal failure
E 04 Non-volatile lockout
E 05 Internal failure
E 06 Internal failure
E 07 Internal failure
E 08 Air pressure switch not closed (80kW only)
E 11 EPROM read/write error
E 12 Fuse 4AT on MCBA blown
E 13 Internal failure
E 14 Internal failure
E 15 Internal failure
E 16 Internal failure
48

FAULT FINDING

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
for short circuits before replacing the fuse.
Action
Check inlet gas pressure
Check flue for blockage
Check wiring to ignition/detection electrode
Check condition of ignition/detection electrode
Check inlet gas pressure
Check flue for blockage
Check wiring to ignition/detection electrode
Check condition of ignition/detection electrode
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
Press reset
Check wiring harnesses & connections
If wiring OK replace boiler control module
Check wiring harnesses & connections
If wiring OK replace boiler control module
Check wiring harnesses & connections
If wiring OK replace boiler control module
Check flue for blockage
Check air pressure switch sensing pipes
Check fan speed
Check air pressure switch & replace if necessary
Replace boiler control module
Replace fuse 4AT
Check wiring harnesses & connections
If wiring OK replace boiler control module
Check wiring harnesses & connections
If wiring OK replace boiler control module
Check wiring harnesses & connections
If wiring OK replace boiler control module
Check wiring harnesses & connections
If wiring OK replace boiler control module
U 1. 2
. Check
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Installation & Servicing