CONQUEST 80 - DSI Output Transformer

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Shut down -
1. The thermostat call ends.
2. The gas valve closes and the
burners go out.
3. The IDB runs for a 5 second post
purge.
4. The main blower operates until
timed off by the IFC.
TROUBLESHOOTING
Indicator Lights
The "OK" light has troubleshooting
features. If a specific problem takes
the furnace off line, the light flashes a
certain number of times to indicate
the problem.
The following lists the sequence of
"OK" light flashes and the associated
problem.
1. One blink followed by a 2 sec.
pause - soft (one hour) lock out.
2. Two blinks followed by a 2 sec.
pause - open pressure switch.
3. Three blinks followed by a 2 sec.
pause - open limit switch.
4. Four blinks followed by a 2 sec.
pause - shorted pressure switch.
5. Five blinks followed by a 2 sec.
pause - improper twinning.
IFC IGNITION TRANSFORMER
Each DSI IFC has a high voltage
output transformer that generates the
spark needed to light the burners.
The wire to the igniter simply "stabs"
onto the IFC transformer spike
connection.
A CAUTION: DO NOT TOUCH
THE IGNITION TRANSFORMER,
IGNITER WIRE, OR THE IGNITERS.
THE TRANSFORMER OUTPUTS AN
EXTREMELY HIGH DC VOLTAGE.
SERIOUS PERSONAL INJURY CAN
RESULT.
FIGURE88
DSI OUTPUT TRANSFORMER
81