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S9240F2051 MODULATING INTEGRATED FURNACE CONTROL
TROUBLESHOOTING
WARNING
Fire, Explosion, or Electrical Shock Hazard.
Can cause severe injury, death or property damage.
Do not attempt to modify the physical or electrical
characteristics of this device in any way. Replace it if
troubleshooting indicates a malfunction.
IMPORTANT
1. The status codes outlined in Table 12 on page 27 are
a general guide. Follow appliance manufacturer
service instructions when available.
2. Take all meter readings within the trial for ignition
period. After the ignition period ends and before
continuing, reset the system by turning down the
thermostat for at least five seconds but for less than
20 seconds.
3. If any component does not function properly, make
sure it is correctly installed and wired before
replacing it.
4. Static discharge can damage the integrated furnace
control. Touch an appliance metal surface to
discharge static electricity before touching the
furnace control.
5. The integrated furnace control cannot be repaired. If
it malfunctions, replace it.
6. Only trained, experienced service technicians should
service integrated furnace control systems. Perform the
checkout steps listed in the Checkout system before
beginning any troubleshooting procedure. After
troubleshooting, check out the system again to be sure
it is operating normally.
This section describes the LED user interface and the error
codes generated by the S9240F control (see "LED Error
Codes" on page 27).
LED User Interface
The LED user interface consists of a 7-segment LED and a
pushbutton as shown in Fig. 15.
69-2807—01
LED
Fig. 15. Location of LED and pushbutton.
Single Digit, 7-segment LED display
The 7-segment LED on the IFC communicates system status
and error codes. Refer to Table 11–12 beginning on page 26.
Pushbutton
The pushbutton enables alternate modes of operation such as
Field Test Mode and Diagnostic Recall mode. A simple,
common use pattern is applied to maintain consistency.
By pressing and holding the pushbutton, The LED cycles
through three menu options:
• Idle
• Diagnostic Recall
• Field Test
Every 3 seconds a new menu item displays. The menu items
continue to cycle as long as the button is held.
To select a menu item, release the button while that menu
item is displayed.
LED Menu Options
Refer to the following items and Table 9:
• Idle Menu Options
— These options display on the menu when the button is
pressed during normal operation.
• Diagnostic Recall Menu Options
— These options display when the button is used in
Diagnostic Recall mode.
— Displays the 10 most recent error codes.
• Field Test Menu Options
— These options display when the button is used in Field
Test mode.
24
PUSHBUTTON
M28645
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