62
FIGURE 46b
MENU TREE
–
CONTINUED
7.
G
AS VLV PRCNT
– Indicates the
firing rate of the modulating gas
valve. This value can be any num-
ber between 40% and 100%
depending on the thermostat
demand.
8.
G
AS VLV RELAY
– Indicates the
state of the gas valve relay –either
ON or OFF. ON indicates that the
main gas valve solenoid is
engaged. Any time the indication is
ON, flame should be present.
9.
F
LAME
– Indicates the presence of
a flame. The possibilities are
4.
A
PPROX IND RPM
– Indicates the
approximate speed of the inducer in
RPM. The value is estimated and
should be close but will not be per-
fectly accurate. When the inducer is
off the text “OFF” will be displayed.
5.
F
URN LO PR SW
– Indicates the
state of the Low Pressure Control
(LPC) (also known as low pressure
switch) – either OPEN or CLOSED.
6.
F
URN HI PR SW
– Indicates the
state of the High Pressure Control
(HPC) (also known as high pres-
sure switch) – either OPEN or
CLOSED.
“OFF”, “MARGINAL”, “GOOD”
and “UNEXPECTED”. A margin-
al flame can be an indicator that
the flame sense rod needs to be
cleaned. “UNEXPECTED”
flame is a serious condition and
must be dealt with immediately
by a professional, licensed
HVAC technician.
10.
B
LOWER CFM
– Indicates the
CFM that the furnace control
requests from the blower motor.
This value may vary somewhat
from the actual values, but it
ST-A1167-01-02
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