Haier GE NF97UM Service Manual page 16

97% upflow/horizontal modulating variable speed gas furnace
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Initiate furnace ignition sequence and move to and hold
mid-fire rate by applying a jumper to R and W2.
Apply then remove the jumper from R to W1 and W2 to
change the firing rate from low fire to mid fire and high
fire.
A vent calibration sequence can be initiated even if a
thermostat signal is not present. Press and hold the push
button until a solid "C" is displayed. Release the button
and calibration will begin. The furnace will perform the
high-fire and low-fire pressure switch calibrations and
display "CAL". After calibration, the LED will return to the
flashing "-" display.
These options are displayed on the menu when the button is pressed during normal operation
No change (idle)
NOTE - No change implies the display will continue to show whatever is currently being displayed for normal operation
These options are displayed when the button is used in Field Test Mode
No change (blinking "-")
These options are displayed when the button is used in diagnostic recall mode
No change (displaying error history)
Solid (3 horizontal bars)
Once the button is released to clear the error history a blinking "c" will be shown on the display for up to 10 seconds. During this
time the user must press and release the button one additional time to confirm the action of deleting the error history. Once the error
history is deleted it cannot be recovered.
Display
Solid "E"
Solid "-"
Table 10. Idle Menu Options
Display
Solid "-"
Solid "c"
Table 11. Field Test Menu Options
Display
Solid "c"
Table 12. Diagnostic Recall Menu Options
During Field Test mode operation, all safety switches are
still in the circuit (they are not by-passed) and indoor blower
performance and timings will match DIP switch selections.
Current furnace firing rate, indoor blower CFM and flame
signal will be displayed. To exit the Field Test mode,
press and hold the button. The menu will resume from the
beginning. Also, cycle the main power to exit the Field Test
mode. The integrated control will automatically exit the Field
Test mode after 45 minutes of operation.
Action (when button is released)
Action (when button is released)
Remain in field test mode
Start pressure switch calibration
Action (when button is released)
Remain in diagnostic recall mode
Exit diagnostic recall mode
Page 16
Remain in idle mode
Enter diagnostic mode
Enter field test mode
Exit field test mode
Clear error history
31-5000723 Rev. 0

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