UV Scanner and Fl
If the buzzer
ame Safeguard Control Test and Repair
sounds, an ignition failure is indicated.
Organizational maintenance has determined that ignition takes place
momentarily but system shuts down immediately after ignition.
multimeter set for dc operation, press reset pushbutton.
voltage at test points (S1) and (S2). If voltage is not 5 to 6
vdc, replace UV scanner (step 12).
Organizational maintenance has determined that ignition does not
occur after pressing reset pushbutton but buzzer sounds.
multimeter set for ac operation,
check for 120 vac at test points
(2) and (5) after pressing reset pushbutton. If voltage is O,
replace flame safeguard control circuit card by loosening two
screws and lifting card out.