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(FASTRON.) VC-220
System Information Access
Diagnostics: Front Panel
10
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Enter System
Information Mode
CODE 2000
Press and
hold for 3
seconds.
Enter code
2 0 0 0
After all sys-
tem informa-
tion has been
displayed (as
shown
above), the
controller will
exit program
mode and re-
turn to idle.
Enter Diagnostics
Mode
CODE 6435
Press and
hold for 3
seconds.
Press and
hold for 3
seconds.
Press PROG
again.
Controller is
now back in
idle mode.
Enter code
6 4 3 5
To confirm
your entry,
press ENTER.
Press ENTER. All discrete
LEDs and all segments of
the display will be on.
As you press each of the eight product keys, all LEDs (except the
associated LED above the key) will be turned off. Also, “Key 1”
through “Key 8” will be shown in the display, along with a short
beep, depending on which key is pressed. As the remaining
bottom row of keys are pressed (including hidden keys), the display
will show “Key 9” through “Key 16.” A short beep will sound as
each key is pressed. Also, as you press keys 1 through 3, the red,
yellow or green lamps will be lit, respectively.
NOTE: The gas valve output signal (head demand on/off) may be
tested by monitoring the gas valve connector pins 1 and 4 for
24VAC once the product Key 1 through Key 7 is pressed during
normal operation.
Exit Diagnostics
Mode
