Schwank STSp-CANADA - Manual (Page 30)

SP-MSTP-AC-15A
STS-p Manual
RD: DEC, 2003
RL:15
KH
MAIN BURNER LIGHTS
SPARK STOPS WHEN
BURNER LIGHTS
SYSTEM RUNS UNTIL CALL
FOR HEAT ENDS
CALL FOR HEAT ENDS:
SYSTEM SHUTS OFF
YES
NO
NO
CHECK FOR GOOD SPARK AT IGNITER.....(SEE
PREVIOUS PAGE)
CHECK OUTPUT VOLTAGE FROM CONTROL
TERMINALS....IF NONE REPLACE CONTROL.
CHECK FOR 25 VAC ACROSS GAS VALVE.
CHECK ELECTRICAL WIRING BETWEEN IGN-
TION CONTROL AND GAS VALVE.... IF OK,
.........REPLACE GAS VALVE.
CONTROL IS NOT SENSING FLAME WITHIN THE
21 SECOND TFI AND IS STILL TRYING TO LIGHT
CHECK CONTINUITY OF SENSOR CABLE AND
GROUND WIRE.
CHECK BURNER FLAME IS COVERING SENSOR.
IF CHECKS ARE OKAY.... REPLACE CONTROL.
NOTE: IF IGNITION CONTROLS GOES INTO A
LOCKOUT,SHUT DOWN BURNER AND RESTART
CHECK CONTINUITY OF SENSOR CABLE AND
GROUND WIRE AS A POOR GROUND COULD
RESULT IN ERRATIC BEHAVIOUR AND NUI-
SANCE SHUTDOWNS EVEN THOUGH OPERA-
TION IS NORMAL AT THE TIME OF CHECKOUT.
IF CHECKS ARE OK, ...........REPLACE CONTROL
CHECK TEMPERATURE CONTROLLER.
CHECK FOR PINCHED WIRING,
REMOVE GAS VALVE LEAD AT CONTROL, IF
V A L V E C L O S E S , R E C H E C K T H E
TEMPERATURE CONTROLLER AND WIRING,
IF VALVE STAYS OPEN... REPLACE GAS VALVE.
TROUBLESHOOTING ENDS
Page 26
YES
NO
NO
YES
YES
cont’d