27
Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
10-6. AFR rod
Part #
ͻഩϯϭϵϭϰϯͲϱϭϳ;<ϭϵϯͿ
Unit Part#
#108
Function
ŚĞĐŬƐĨůĂŵĞĐŽŶĚŝƚŝŽŶƐĚƵƌŝŶŐĐŽŵďƵƐƚŝŽŶ͘
tŚĞŶ&ZƌŽĚĚĞƚĞĐƚƐƵŶĞdžƉĞĐƚĞĚĨůĂŵĞĐŽŶĚŝƚŝŽŶƐ͕ƚŚĞĐŽŵƉƵƚĞƌŽĨƚŚĞ
ǁĂƚĞƌŚĞĂƚĞƌŵĂŬĞƐĂĚũƵƐƚŵĞŶƚƐŝŶƚŚĞĨĂŶŵŽƚŽƌƐƉĞĞĚƚŽĐŽŵƉĞŶƐĂƚĞ͘
Failure events
ϭ͘hŶĂďůĞƚŽĚĞƚĞĐƚĨůĂŵĞƐǁŚĞŶĨůĂŵĞƐĂĐƚƵĂůůLJĚŽŽĐĐƵƌ͘
Ϯ͘ĞƚĞĐƚŝŶŐĂĨĂůƐĞĨůĂŵĞǁŚĞŶŶŽĨůĂŵĞƐĂĐƚƵĂůůLJŽĐĐƵƌ͘
Effects on the water heater
if AFR rod fails
ϭ͘dŚĞǁĂƚĞƌŚĞĂƚĞƌƐƚŽƉƐŽƉĞƌĂƚŝŶŐ͘dŚĞΗϭϭϭ͟ĂŶĚͬŽƌ͞ϭϮϭ͟ĞƌƌŽƌĐŽĚĞ;ƐͿ
will display.
Ϯ͘dŚĞǁĂƚĞƌŚĞĂƚĞƌǁŝůůŶŽƚŝŶŝƚŝĂƚĞƚŚĞŝŐŶŝƚŝŽŶƉƌŽĐĞƐƐ͘dŚĞΗϳϮϭ͟ĞƌƌŽƌ
code will display.
ϯ͘dŚĞĨĂŶŵŽƚŽƌƐƉĞĞĚĐĂŶŶŽƚďĞŵŽĚƵůĂƚĞĚƉƌŽƉĞƌůLJƵŶĚĞƌĂďŶŽƌŵĂů
ĨůĂŵĞĐŽŶĚŝƚŝŽŶƐ͕ǁŚŝĐŚĐĂŶƌĞƐƵůƚŝŶĞdžĐĞƐƐŝǀĞKĞŵŝƐƐŝŽŶ͘
Error codes when
the AFR rod fails
101 391 991
Diagnostic
ϭ͘sŝƐƵĂůŝŶƐƉĞĐƚŝŽŶ͗ĐŽŶŶĞĐƚŝŽŶͬďƌĂŬŝŶŐŽĨǁŝƌĞƐ͕ƐŽŽƚŽŶŝƚ͘
Ϯ͘ŚĞĐŬǀŽůƚĂŐĞƐ͗ƉƌŽƉĞƌƌĂŶŐĞŽĨǀĂůƵĞƐĂƌĞƐŚŽǁŶďĞůŽǁ͘
Color / Number of wires
Yellow - AFR rod
(Between the AFR rod and
the computer board)
(During operation)
DŽƌĞƚŚĂŶϭʅ
Check
point
I
The flame rod is assembled with the AFR rod.
3/4" (19.5 mm)
1" (27 mm)
1/2" (12 mm)
2-1/8" (54 mm)
>ĞĂĚƚŽĐŽŵƉƵƚĞƌďŽĂƌĚ
Detecting elements
;&ZĂŶĚĨůĂŵĞƌŽĚƐͿ
Black mark