Rheem RGDG, Installation Instructions Manual, Page: 38 / 48

38
NOTE: STATIC DISCHARGE CAN DAMAGE INTEGRATED FURNACE CONTROL (IFC)
MAIN BURNER
REMAINS POWERED
AND LIT
INDOOR BLOWER MOTOR
STARTS 20 SECONDS
AFTER GAS VALVE OPENS
SYSTEM RUNS
UNTIL CALL FOR
HEAT ENDS
TURN THERMOSTAT TO OFF
VALVE SHUTS OFF
FLAME OFF
IDM MOTOR STOPS AFTER 5 SEC.
INDOOR BLOWER MOTOR
STOPS AFTER
90/120/160/180 SECONDS
TROUBLESHOOTING ENDS
NOTE: IF (IFC) GOES INTO LOCKOUT WAIT 30 SECONDS THEN
RESET SYSTEM
• CHECK POLARITY OF 115VAC SUPPLY
• CHECK CONTINUITY OF GROUND WIRE
• CHECK INSULATION OF IGNITER LEADS
• CHECK FLAME SENSE CURRENT (YELLOW LED)
LED IS ON IF FLAME CURRENT IS GOOD.
IT FLASHES IF CURRENT IS MARGINAL.
• TURN POWER OFF TO UNIT
• CLEAN FLAME SENSOR WITH STEEL WOOL IF LED FLASHES
• RESTORE POWER TO UNIT
• IF CHECKS ARE OK, REPLACE (IFC)
• CHECK FOR 115VAC ACROSS REPLACE (IFC) IF
BLOWER MOTOR AND BLOWER WIRING TO BLOWER
MOTOR TERMINALS (HEAT AND MOTOR IS OK
NEUTRAL) ON (IFC)
REPLACE BLOWER MOTOR
NOTE: IF (IFC) GOES INTO LOCKOUT WAIT 30 SECONDS THEN
RESET SYSTEM
• CHECK CONTINUITY OF GROUND WIRE. NOTE: IF GROUND IS
POOR OR ERRATIC, SHUTDOWN MAY OCCUR OCCASIONALLY
EVEN THOUGH OPERATION IS NORMAL AT THE TIME
OF CHECKOUT.
• CHECK FLAME SENSE CURRENT
• CHECK FOR EXCESSIVE HEAT AT IGNITER BASE
(TEMP. ABOVE 1000 F (538 C) CAUSES SHORT TO GROUND)
• TURN POWER OFF TO UNIT
• CLEAN FLAME SENSOR WITH STEEL WOOL
• RESTORE POWER TO UNIT
• IF CHECKS ARE OK, REPLACE (IFC)
• CHECK FOR PROPER THERMOSTAT OPERATION
• REMOVE VALVE LEAD AT (IFC)
IF VALVE CLOSED, RECHECK THERMOSTAT AND
WIRING. IF NOT, REPLACE VALVE.
• CHECK FOR OPEN LIMIT.
• REPLACE (IFC)
• CHECK FOR OPEN LIMIT.
REPLACE (IFC)
REPEAT PROCEDURE UNTIL TROUBLE FREE
OPERATION IS OBTAINED.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO