281 Issue 1 - Service Manual - BX3
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5.9 Eight Flashes – Frequency Lockout ........................................................ 21
5.10 Nine Flashes - Flame Lockout Invalid Flame ......................................... 22
5.11 Ten Flashes – False Flame ................................................................... 22
5.12 Eleven Flashes - SafeStart Lockout ...................................................... 22
5.13 Twelve Flashes – Secondary Fafeguard Timing Fault ........................... 22
5.14 Three Slow Flashes – Ground Fault Lockout ......................................... 23
5.15 Three Slow Flashes - Ground Fault Lockout.......................................... 23
5.16 Three Slow Flashes - Ground Fault Lockout.......................................... 24
6.0 MAIN COMPONENTS SERVICING ........................................................ 25
6.1 Gas Valve Servicing ................................................................................ 25
6.2 Combustion Fan Servicing ...................................................................... 27
6.3 Spark Igniter Servicing ............................................................................ 28
6.4 Flame Sensor Servicing .......................................................................... 28
6.5 Pressure Switch Servicing ....................................................................... 29
6.6 Main Fan Assembly Servicing ................................................................. 29
6.7 Unit Operation ......................................................................................... 30
7.0 DISMANTLING PROCEDURES .............................................................. 31
7.1 Burner Assembly Removal ...................................................................... 31
7.2 Gas Manifold Assembly Removal ............................................................ 31
7.3 Gas Valve Removal ................................................................................. 32
7.4 Pressure Switch Assembly Removal ....................................................... 32
7.5 Combustion Fan Removal ....................................................................... 32
7.6 Main Fan Assembly Removal .................................................................. 34
7.7 HCDSI24-1 Electronic Control Board Removal ........................................ 35
7.8 240 to 24 Volt Transformer Removal ....................................................... 35
7.9 Heat Exchanger Removal ........................................................................ 36
8.0 Flue Instructions ...................................................................................... 38
