There is no pilot light on a pressure fed oil boiler like yours.
Go to: http://www.global.firebird.ie/Portals/2/docs/std%20Popular-Heatpac-MANUAL.pdf
and download the installation and user manual.
I suggest your boiler has 'locked out' (see section 4c) because it is overdue for a service or no oil, filter clogged or a dirty or duff photoelectric cell.
Get someone who knows what he is looking for. Then get a regular service contract.
GB in Wales, March 2013
