Lennox CBX32MV Installation Instructions Manual page 22

B Once demand is met, motor runs at 100% for 45
seconds.
C Motor ramps down to stop.
Heating
100% CFM
A B
OFF
30 sec
delay
HEATING DEMAND
A When heat demand is initiated, 30 seconds motor
on delay starts
B After the motor on delays expires, motor ramps up
to 100% and runs at 100% until demand is
satisfied.
C Once demand is met, motor runs at 100% for 45
seconds.
D Motor ramps down to stop.
Delay Profile 3
B
7 1/2 MIN
A
OFF 82%CFM
COOLING DEMAND
A When cool demand is initiated, motor ramps up to
82%
AHC Single Character
Display
Letter or Number
- -
-
.
A
C
d
d F
H
h
U
Heat Pump only:
C
D
100% CFM
45 SEC.
C
100% CFM
Table 10. AHC System Status Codes
Action
Unit Size Code displayed represents air handler model size and capacity. See Configuring Unit Size Codes in figure
23.
I
f three horizontal bars are displayed, AHC does not recognize air handler model size and capacity. See Configuring
Unit Size Codes in Figure 23.
Idle mode (decimal point / no unit operation)
Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode
displayed. Example: A1200
Cooling stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting displayed / Pause / Repeat
codes). Example C1 or C2
Dehumidification mode (1 second ON) / 1 second OFF) / cfm setting displayed / Pause / Repeat Codes)
Defrost mode. (Y, W and O call)
Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting displayed / Pause / Repeat codes.
Example: H1 or H2 or H3
Variable Capacity Heat (1 second ON, 0.5 second OFF) / % of input rate displayed / Pause/ cfm setting / Pause/ Re-
peat codes. Example: h1 or h2
Discharge air sensor temperature (indoor blower must be operating) U105
B Motor runs at 82% for approximately 7.5 minutes
and then ramp up to 100% (unless the demand
has been satisfied) and motor runs at 100% until
demand is satisfied.
C Once demand is met, motor ramps down to stop
OFF
C
B
OFF
A
1/2 MIN
50% CFM
A When cool demand is initiated, motor ramps up to
50%
B Motor runs at 50% for 30 seconds and ramps up to
82%
C Motor runs at 82% for approximately 7.5 minutes
and then ramp up to 100% (unless the demand
has been satisfied) and motor runs at 100% until
demand is satisfied.
D Once demand is met, motor runs at 50% for 30
seconds.
E Motor ramps down to stop.
DISPLAY
An on−board single character LED display (see figure 21
OFF
for LED display location) indicates general system status
information such as mode of operation, indoor blower CFM
and error codes. Multi−character strings are displayed with
character ON for one second, OFF for 0.5 seconds and
one second pause between the character groups.
Page 22
Delay Profile 4
7 1/2 MIN 100%
82% CFM
CFM
COOLING DEMAND
D E
OFF
1/2 MIN
50% CFM