CONQUEST 90 - Hazardous Voltage; Line Voltage

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FIGURE 101
(-)GTA & (-)GTJ MODELS WITH INTEGRATED FURNACE CONTROL (IFC) UTEC 1028-927, -928,
JOHNSON CONTROLS G961 DAJ-2401, -2402, OR UTEC 1012-925
•
,
START
INTEGRATED FURNACE CONTROL (IFC)
1. SET FAN SWITCH TO AUTO
2. SETTHERMOSTATTO
TROUBLESHOOTING GUIDE
CALL FOR HEAT
INDUCED DRAFT
1--N_o_____ cHECK FOR 115 VAC 1-----Y_E_s _______
lREPLACE INDUCER I
MOTOR STARTS
AT INDUCER · ·
,
WARNING
"_Ill. HAZARDOUS VOLTAGE
DISCONNECT POWER BEFORE SERVICING.
'II LINE VOLTAGE
SERVICE MUST BE BY A TRAINED,
'II" CONNECTIONS
QUALIFIED SERVICE TECHNICIAN.
YES
~----''--N_O_~ REPLACE AUXILIARY
CHECK FOR 115 VAC YES TEMPERATURE SWITCH
AT IFC's INDUCER 1----------...o-1 IF WIRING TO SWITCH
OUTPUT ISOK
NO • CHECK LINE VOLTAGE
NO
• CHECK LOW VOLTAGE TRANSFORMER
IFC'sPOWER
1----- • CHECK IN-LINE FUSE ON TRANSFORMER
LEDON?
LOW VOLTAGE LINE (IF INCLUDED)
YES
MICROPROCESSOR STATUS LED ON?
NO
NOTE:
"OK" LED WILL FLASH 1-------ll,-.; REPLACE IFC
1 OF 5 FAULT CODES
YES
CHECK FOR 24 VAC FROM 1----N_O ____ CHECK THERMOSTAT
"W" TO "C" ON IFC WIRING
~-----~
YES
• CHECK ALL WIRING ON IFC NO REPLACE VENT
• CHECK PRESSURE SWITCH, OPEN?
1-----Jio-1 PRESSURE SWITCH
IF THE PRESSURE SWITCH DOESN'T YES REPLACE VENT
30 SEC. PREPURGE NO CLOSE WITHIN 60 SEC. THE IDM WILL
1-----1~ PRESSURE SWITCH
~-----------_;-------;..., STOP FOR 5
MIN. AND RETRY. DOES IOM
YES RECYCLE EVERY 5 MINUTES?
NO
NO
NO • CHECK FOR BLOCKED VENT
REPLACE SWITCH
SPARK IGNITOR ENERGIZES
1------..-i • CHECK AIR PROVING SWITCH (CLOSED)
(OR)
• CHECK WIRING TO IGNITER NO REPLACE IFC
HSI WARM-UP
• CHECK FOR SPARK AT IGNITER i---------.--i IF WIRING TO
YES
ELECTRODE IGNITER IS OK
YES
REPLACE IGNITER
FLOW CHART CONTINUED ON NEXT PAGE
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