Rheem RGPH Installation Instructions Manual page 42

MAIN BURNER
REMAINS POWERED
AND LIT
INDOOR BLOWER MOTOR
STARTS 20 SECONDS
AFTER GAS VALVE OPENS
MAIN BURNER
REMAINS POWERED
AND LIT
TURN THERMOSTAT TO OFF
VALVE SHUTS OFF
FLAME GOES OUT
DRAFT MOTOR STOPS
AFTER 5 SEC.
INDOOR BLOWER MOTOR
STOP AFTER
90/120/160/180 SECONDS
TROUBLESHOOTING ENDS
42
SYSTEM WILL ATTEMPT TO LIGHT 4 TIMES. VOLTAGE IS PRESENT AT THE
VALVE FOR ONLY 8 SECONDS DURING EACH TRIAL FOR IGNITION (SYSTEM
WILL GO INTO A 1-HOUR LOCKOUT AFTER 4 TRIES), THE BLOWER AND
INDUCED DRAFT BLOWER WILL RUN 100 SEC. IF THE SECOND IGNITION
TRIAL FAILS TO SENSE FLAME
• CHECK IGNITER POSITION,
• CHECK FOR GAS FLOW TO AND FROM VALVE.
REPLACE VALVE IF NO
FLOW THRU VALVE
NO
NOTE: IF (IFC) GOES INTO LOCKOUT WAIT 30 SECONDS THEN
RESET SYSTEM
• CHECK POLARITY OF 115VAC SUPPLY
• CHECK CONTINUITY OF GROUND WIRE
• CHECK INSULATION ON IGNITER LEADS
YES
• 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 BLOWER
NO
MOTOR AND BLOWER MOTOR TERMINALS
(HEAT AND NEUTRAL) ON (IFC)
YES
REPLACE BLOWER MOTOR
NO
NOTE: IF (IFC) GOES INTO LOCKOUT WAIT 30 SECONDS THEN
RESET SYSTEM
• CHECK CONTINUITY OF GROUND WIRE, NOTE: IF GROUND IS
YES
POOR OR ERATIC, SHUTDOWN MAY OCCUR OCCASIONALLY EVEN
THOUGH OPERATION IS NORMAL AT THE TIME OF CHECKOUT.
• CHECK FLAME SENSE CURRENT
• IF CHECKS ARE OK, REPLACE (IFC)
• CHECK FOR PROPER THERMOSTAT OPERATION.
NO
• REMOVE VALVE LEAD AT (IFC)
IF VALVE CLOSED, RECHECK THERMOSTAT AND
WIRING IF NOT, REPLACE VALVE
YES
NO
• CHECK FOR OPEN LIMIT,
REPLACE (IFC)
YES
NO
• CHECK FOR OPEN LIMIT,
REPLACE (IFC)
YES
• CHECK FOR 24VAC ACROSS THE VALVE AND
VALVE TERMINALS ON THE (IFC)
YES
• 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.
• RESTORES POWER TO UNIT.
REPEAT PROCEDURE UNTIL TROUBLEFREE
OPERATION IS OBTAINED.
NO
REPLACE (IFC) IF WIRING
TO VALVE IS OK
REPLACE (IFC) IF
NO
WIRING TO BLOWER
MOTOR IS OK
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