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240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
10-8. Secondary heat exchanger
Part#
*See the table below
Unit
Part#
#401
Function
ďƐŽƌď ůĂƚĞŶƚ ŚĞĂƚ ĨƌŽŵ ĞdžŚĂƵƐƚ ŐĂƐ ĂŶĚ ƚƌĂŶƐĨĞƌ ƚŚĞ ǁĂƚĞƌ ƚŚƌŽƵŐŚ ƚŚĞ
ƐĞĐŽŶĚĂƌLJŚĞĂƚĞdžĐŚĂŶŐĞƌƉŝƉĞƐ͕ǁŚŝĐŚĐĂŶŝŵƉƌŽǀĞŚĞĂƚĞĨĨŝĐŝĞŶĐLJŽĨƚŚĞ
ƵŶŝƚďLJĂƉƉƌŽdžŝŵĂƚĞůLJϭϮй͘
Failure events
ϭ͘tĂƚĞƌůĞĂŬĂŐĞĨƌŽŵƚŚĞƐĞĐŽŶĚĂƌLJŚĞĂƚĞdžĐŚĂŶŐĞƌ͘
Ϯ͘>ĞĂŬŝŶŐĞdžŚĂƵƐƚŐĂƐ͘
Effects on the water heater
if the secondary heat
exchanger fails
ϭ͘tĂƚĞƌůĞĂŬĂŐĞĨƌŽŵƚŚĞƐĞĐŽŶĚĂƌLJŚĞĂƚĞdžĐŚĂŶŐĞƌ͘
Ϯ͘džŚĂƵƐƚŐĂƐůĞĂŬĂŐĞ
3. Abnormal sounds during combustion
Error codes when
the secondary heat
exchanger fails
N/A
Diagnostic
ϭ͘sŝƐƵĂůŝŶƐƉĞĐƚŝŽŶ͗ƐŽŽƚĚĞƉŽƐŝƚƐ͕ĐƌĂĐŬƐŽŶƚŚĞƐĞĐŽŶĚĂƌLJŚĞĂƚĞdžĐŚĂŶŐĞƌ
ǁĂůůƐ͕ĂŶĚͬŽƌǁĂƚĞƌůĞĂŬĂŐĞĨƌŽŵƚŚĞƐĞĐŽŶĚĂƌLJŚĞĂƚĞdžĐŚĂŶŐĞƌ͘
Ϯ͘/ŶƚŚĞĞǀĞŶƚŽĨĂďŶŽƌŵĂůƐŽƵŶĚƐĚƵƌŝŶŐĐŽŵďƵƐƚŝŽŶ͗
/ŶƐƉĞĐƚĨŽƌƐŽŽƚďƵŝůĚƵƉŝŶƐŝĚĞƚŚĞƐĞĐŽŶĚĂƌLJŚĞĂƚĞdžĐŚĂŶŐĞƌ͘
Color / Number of wires
N/A
Checkpoint
N/A
Part #
Model
319143-525
EK198
240 Indoor (T-H3J-DV) / 340 (T-H3S-DV)
319143-526
EK199
240 Outdoor (T-H3J-OS) / 340 (T-H3S-OS)
319143-527
EK200
540 Indoor (T-H3-DV)
319143-528
EK206
540 Outdoor (T-H3-OS)
*
EKd͗
Pictures are on the following page