TM 10-4510-206-14
5-7.
REPAIR PROCEDURES (CONT'D)
m.
UV Scanner and Flame Safeguard Control Test and Repair (C0nt'd).
7.
Turn off load limit switch and remove flame safeguard control
circuit card by removing two screws.
Lift circuit card out.
8. Turn on load limit switch and using a multimeter check for 120 vac
on base terminal board terminals 2 and 7.
If voltage is not
normal, test low water probe (paragraph 5-6 l) and temperature limit
and control circuits (paragraph 5-6 l). If voltage at terminals 2
and 7 is normal, go to next step and replace female safeguard
control circuit card.
9.
Turn off power limit switch and install replacement flame safeguard
control circuit card by setting card in place and tightening two
screws.
Change 4
5-61
