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MAIN BURNER LIGHTS
YES
SPARK STOPS WHEN
BURNER LIT.
YES
DOES FLAME REMAIN
STABLE AFTER THE
SPARK CYCLE IS COM-
PLETE. [NO FLAME FAIL]
YES
SYSTEM RUNS UNTIL
CALL FOR HEAT ENDS
YES
CALL FOR HEAT ENDS;
SYSTEM SHUTS OFF
TROUBLE SHOOTING ENDS
NOTE: IF CONTROL GOES INTO LOCKOUT, THE SYSTEM CAN BE
RESET BY INTERRUPTING THE POWER SOURCE
CHECK FOR CORRECT MANIFOLD GAS PRESSURE
*
NO
*CHECK FOR OBSTRUCTION IN GAS SUPPLY OR OR-
IFICE [INSECTS, SPIDERS COCOONS ETC.]
CHECK FLAME SIGNAL WITH METER FOR 0.7µA.
IF READING IS LOW CHECK GAS PRESSURE, IF OK
CHANGE SENSOR.
NO
CHECK FOR CONTINUITY OR SENSOR CABLE AND
GROUND WIRE.
CHECK THAT BURNER FLAME COVERS ALL ELEC-
TRODES.
IF CHECKS ARE OKAY, REPLACE CONTROL MODULE.
CHECK SENSOR FLAME SIGNAL WITH METER FOR
0.7µA MINIMUM STEADY READING.
IF READING IS LOW CHECK GAS PRESSURE
IF OK .....CHANGE SENSOR.
NO
CHECK FOR CONTINUITY OR SENSOR CABLE AND
GROUND WIRE.
CHECK THAT BURNER FLAME COVERS ALL ELEC-
TRODES. IF CHECKS ARE OKAY, REPLACE CONTROL
MODULE.
NOTE: IF GROUND IS POOR OR ERRATIC, SHUT-
DOWN MAY OCCUR OCCASIONALLY EVEN THOUGH
OPERATION IAPPEARS NORMAL AT THE TIME.
CHECK FOR PROPER TEMPERATURE CONTROLLER
OPERATION.
CHECK SENSOR FLAME SIGNAL WITH METER FOR
NO
0.7µA MINIMUM STEADY READING.[REPEAT ABOVE]
CHECK AND ADJUST TEMPERATURE CONTROLLER
SETTING AND CHECK CONTROLLER CONNECTIONS
CHECK FOR PINCHED WIRING.
NO
REMOVE VALVE LEAD AT CONTROL IF VALVE CLOS-
ES, RECHECK TEMPERATURE CONTROLLER AND
WIRING;
IF VALVE DOES NOT CLOSE REPLACE GAS VALVE.
39
2100 / IO-100 Manual
IM110107
RD: AUG 2021
R.L. 11A
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