CONQUEST 80 - Page 85

FIGURE90
INTEGRATED FURNACE CONTROL (IFC) UTEC 1012-925 (115 VAC HOT SURFACE IGNITER)
WARNING
ll
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
• EXAMINE IFC POWER LED AND FLASH CODES FROM "OK" LED
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" LEDON?
NO
NOTE: "OK" LED WILL
>---------.-i REPLACE IFC
FLASH 1 OF 4 FAULT CODES
YES
CHECKFOR24VACFROM 1------N_O ___ CHECKTHERMOSTAT
"W" TO "C" ON IFC WIRING
~-----~
YES
• CHECK ALL WIRING ON IFC NO REPLACE VENT
• CHECK PRESSURE SWITCH, OPEN?
t----- PRESSURE SWITCH
YES
CHECK FOR 115 VAC AT INDUCER
t-- __ N_O____ REPLACE IFC
AND INDUCER OUTPUT AT IFC
YES
REPLACE INDUCER
IF THE PRESSURE SWITCH DOESN'T CLOSE REPLACE VENT
30 SEC. PREPURGE
t---------;i~ WITHIN 60 SEC. THE IDM WILL STOP FOR PRESSURE SWITCH
~-----Y-ES~-----~ 5 MIN. AND RETRY. DOES IDM RECYCLE?
NO
REPLACE VENT
• CHECK FOR BLOCKED VENT
PRESSURE SWITCH
1-----------1~
NO
• CHECK AIR PROVING SWITCH (CLOSED)
HSI WARM-UP
• CHECK WIRING TO IGNITER NO REPLACE IFC
• CHECK FOR 115 VAC AT IGNITER
>----------- IF WIRING TO
YES
TERMINALS AND AT IFC TERMINALS IGNITER IS OK
YES
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