SERVICING
68
Diagnostics Flash Codes
LED Steady On Control is OK in standby, heat, cool, or
fan only modes.
LED Steady Off Internal control fault or no power.
1 Flash Lockout due to failed ignition or flame
dropouts.
2 Flashes Pressure switch is open with induced draft
motor energized.
3 Flashes Pressure switch is stuck closed with in-
duced draft motor de-energized.
4 Flashes Limit switch is open (primary, auxiliary,
or roll out).
5 Flashes Flame detected with gas valve closed.
6 Flashes Compressor output delayed from short
cycle timer.
7 Flashes Low flame sense current. Control will
flash 7-times while continuing normal
operation.
8 Flashes Lock out due to five consecutive limit trips
within a single call for heat. Resets in 1/
2 hour.
NOTE: The flash rate is 0.25 seconds on, 0.25 seconds off,
with a 2 second pause between codes.
S-314 CHECKING FLAME SENSOR
A flame sensing device is used in conjunction with the igni-
tion control module to prove combustion. If a microamp sig-
nal is not present the control will de-energize the gas valve
and "retry" for ignition or lockout.
The drawing below illustrates , the approximate distances for
the pilot assembly to the gas inshot burner. You will note
they are not in the main burner stream, but along the carry
over ports.
"A"
CORRECT
POSITION
DIMENTION
"A" CANNOT
EXCEED 1/4"
Burner Assembly
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