42
Field Selections
FLAME STATUS L.E.D. (AMBER)
A yellow or amber L.E.D. is provided to indicate flame status.
When normal flame is sensed, the flame L.E.D. is continuously
on. The flame L.E.D. will flash at a rate of one to four flashes per
second if a weak flame is detected. If an unexpected flame is de-
tected, the L.E.D. will flash rapidly. The L.E.D. is off when there is
no flame detected.
For more diagnostics information, consult the wiring diagram and
diagnostics chart at the end of this book.
TIMING DIAGRAM
On the next page is a timing diagram for normal heat sequence.
This diagram assumes no faults are present during the heat call.
MANUAL FAULT CLEAR; SW4
Faults will automatically be cleared from the fault buffer after one
week. The fault buffer can also be manually cleared if this is de-
sired. For the first 30 seconds after a change in state of dip-
switch SW4, the furnace control will wait to determine if the
switch becomes on/off/on/off/on/off or off/on/off/on/off/on
within 30 seconds. When this action is detected within 30 sec-
onds, the fault code memory buffer shall be cleared. Be sure to
return the dipswitch to the original state (on or off) or is in the de-
sired position after clearing the fault buffer using this method.
FAULT RECALL
Upon power reset, the three most recent faults which are less
than one week old will be flashed in succession from the most re-
cent to the oldest. This will be done as a diagnostic aid to the
field technician. After one week, a fault will be removed from the
fault buffer.
TIMING DIAGRAM, FIELD SELECTIONS &
ADJUSTMENTS
FAULT CLEAR
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