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LT 7602 Issue No2 (07/17)
480 HD SERVICE / FAULT FINDING INSTRUCTIONS
Remove the four screws retaining the gas inlet plate and the ECU cover.
Shut off the restrictor elbow and disconnect the 8mm inlet nut.
Switch off the mains supply from the main supply plug socket.
Undo the two M3 nut retaining the ECU unit and remove the connection bracket plus
disconnect the mains supply cable from ECU.
Take out the three screw retaining the burner tray assembly and lift out of the fire box shelf
taking care not to damage the panels.
Remove the two side liner fixing bracket LH & RH which are situated in the roof of the fire box
assembly.
Carefully remove the LH & RH side panels.
Remove the rear panel from within the fire box.
Finally remove the eight screws from the inner and outer inspection covers. (Please see figure
1)
With the covers removed. The catchment area at the rear of the fire box can now be
inspected for debris. With the aid of a mirror via the back of the box check the path of the
flue for any restrictions. Re-assemble in reverse order.
Pilot Linting
Check the pilot aeration hole for linting, use a vacuum clearer nozzle taking care not to
damage the pilot head. Do not blow compressed air into the pilot as this can lodge debris in
the pilot body.
Summary of Contents for 480HD
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