Service Manual

48
SERVICING
SERVICE NUMBERS
S-1 CHECKING VOLTAGE ................................................................................................................................. 55
S-2 CHECKING WIRING .................................................................................................................................... 55
S-3A THERMOSTAT AND WIRING ....................................................................................................................... 55
S-3B HEATING ANTICIPATOR .............................................................................................................................. 55
S-4 CHECKING TRANSFORMER AND CONTROL CIRCUIT .............................................................................. 56
S-16A CHECKING AIR CIRCULATOR BLOWER MOTOR (EEM) ........................................................................... 56
S-200 CHECKING DUCT STATIC ........................................................................................................................... 56
S-201 CHECKING TEMPERATURE RISE ............................................................................................................. 57
S-300 CHECKING PRIMARY LIMIT CONTROL ...................................................................................................... 57
S-301 CHECKING AUXILIARY LIMIT CONTROL .................................................................................................... 58
S-302 CHECKING FLAME ROLLOUT CONTROL .................................................................................................. 60
S-303 INDUCED DRAFT BLOWER MOTOR .......................................................................................................... 60
S-304 CHECKING GAS VALVE (REDUNDANT) .................................................................................................... 60
S-305 CHECKING MAIN BURNERS ...................................................................................................................... 61
S-308 CHECKING HOT SURFACE IGNITOR ......................................................................................................... 64
S-309 CHECKING FOR FLASHBACK ................................................................................................................... 64
S-310 CHECKING PRESSURE SWITCH ............................................................................................................... 64
S-311 HIGH ALTITUDE APPLICATION (USA) ......................................................................................................... 65
S-312 CHECKING FOR DELAYED IGNITION ........................................................................................................ 65
S-313 CHECKING INTEGRATED IGNITION CONTROL BOARDS........................................................................ 65
S-314 CHECKING FLAME SENSOR ................................................................................................................... 66