FIGURE 100
(·)GRJ MODELS WITH INTEGRATED FURNACE CONTROL (IFC) UTEC 1012-925 (115 VAC IGNITER)
WARNING
~
HAZARDOUS VOLTAGE
DISCONNECT POWER BEFORE SERVICING.
LINE VOLTAGE SERVICE MUST BE BY A TRAINED,
CONNECTIONS
QUALIFIED SERVICE TECHNICIAN.
START
INTEGRATED FURNACE CONTROL (IFC)
1. SET FAN SWITCH TO AUTO
2. SETTHERMOSTATTO
TROUBLESHOOTING GUIDE
CALL FOR HEAT
NO
INDUCED DRAFT
1------....-i • EXAMINE IFC POWER LEO AND FLASH CODES FROM "OK" LEO
MOTOR STARTS
POWER LED ON? ,___,...•CHECK LINE VOLTAGE POWER
YES
NO • CHECK LOW VOLTAGE TRANSFORMER
YES • CHECK IN-LINE FUSE ON TRANSFORMER
LOW VOLTAGE LINE
"OK" LED ON? NO
NOTE: "OK" LED WILL
1---------1~ REPLACE IFC
FLASH 1 OF 4 FAULT CODES
YES
CHECK FOR 24 VAC FROM
f-- __ __ CHECK THERMOSTAT N_O .._
"W" TO "C" ON IFC WIRING
'----------'
YES
• CHECK ALL WIRING ON IFC ,___._N_O---ll~REPLACE VENT
• CHECK PRESSURE SWITCH, OPEN? PRESSURE SWITCH
f/)
YES
CHECK FOR
115 VAC AT INDUCER 1-----N_O ___ REPLACE IFC
AND INDUCER OUTPUT AT IFC
YES
REPLACE INDUCER
IF THE PRESSURE SWITCH DOESN'T CLOSE REPLACE VENT
30 SEC. PREPUAGE
1------...-.i WITHIN 60 SEC. THE IDM WILL STOP FOR PRESSURE SWITCH
-------Y-E-S....--------~ 5
MIN. AND RETRY. DOES IDM RECYCLE?
NO
REPLACE VENT
NO • CHECK FOR BLOCKED VENT
PRESSURE SWITCH
SPARK IGNITOR ENERGIZES
i------- • CHECK AIR PROVING SWITCH (CLOSED}
(OR)
• CHECK WIRING TO IGNITER NO REPLACE IFC
HSI WARM-UP
• CHECK FOR
115 VAC AT IGNITER 1-------:ll""'I IF WIRING TO
YES
TERMINALS AND AT IFC TERMINALS IGNITER IS OK
YES
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