Technical information

Installation and servicing instructions strictly reserved
for qualified gas installers
43
FAULT FINDING
NOTE:
Before trying to operate the boiler make sure
that :
• All gas supply cocks are open and that the gas
supply has been purged of air.
• There is a permanent mains supply to the
boiler.
• There is a heating demand from the external
controls.
WARNING:
Always isolate the boiler from the electrical supply
before carrying out any electrical replacement
work.
Always check for gas soundness after any service
work.
Electrical Testing
Should there be any doubt about the voltage
supply to any of the components, it is possible to
carry out a simple electrical test.
IMPORTANT: On completion of the Service/Fault
Finding tasks which have required the breaking and
remaking of the electrical connections the earth
continuity, polarity, short circuit and resistance
to earth checks must be repeated using a suitable
multimeter.
To carry out the electrical test, gain access, as
follows:
Hinge down the control box and remove Torx
screws and unhook the rear panel, refer diagram
12.1.
Refer to the Wiring diagram 12.2 and fault finding
charts diagrams 12.3 and 12.4.
Diagram 12.1
12597
CONTROL PANEL
RETAINING
STRAP
RETAINING
SLOT