TM 10-4520-259-13&P
5-13. UV SCANNER AND FLAME SAFEGUARD CONTROL. (CONT)
WARNINGS
Remove all jewelry before working on the water heater. Jewelry can catch on
equipment and cause injury, or may short across an electrical circuit and cause
severe burns or electrical shock and death.
Use extreme caution when performing the following test with power on.
Electrical current can cause severe injury or death.
f.
Set power switch to on and check for 120 Vac at test points (TP) 1 and 2 with multimeter. If voltage is
not normal, test power switch and power source as described in step h. If voltage is normal, proceed to next
step.
g.
Turn off power switch and remove two screws (7) and flame safeguard control (6).
h.
Turn on power switch and check for 120 Vac on terminals #2 and #7 of base terminal board (8). If
voltage is not normal, disconnect power source and replace power switch as described in paragraph 5-14. If
voltage at terminals 2 and 7 is normal, proceed to the next step.
i.
Turn off power switch and install replacement flame safeguard control (6). Set new control in place and
tighten two screws (7).
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