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38
Model
Function
Failure Event
Effects
Error Code
Diagnostic
Color / Wire Number
1. Heat exchange method : Instantaneous
2. Material : SUS
3. Construction : SUS brazing
Heat Exchanger(STS)
The part for heating the hot water by Absorbing the high-temperature heat generated at
the burner.
① Water or exhaust gas leakage.
② Abnormal heat exchange.
① Operation of product is stopped.
② Exhaust gas leakage.
③ Abnormal noise occurs.
Er 20, Er 33, Er 43, Er 94
Check the heat exchanger surface for cracks or leaks.
N/A
Chapter 2 Components Description
Check Point
N/A
(Circuit Board)
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