Lennox XC21 Series Unit Information page 48

AIR CONDITIONER CONTROL (A175) UNIT
NOMINAL CAPACITY CODE CONFIGURATION
In a communicating system, the unit capacity code must be
configured if the room thermostat is indicating either an
START
Set room thermostat
to OFF
Go to air conditioner
control terminal strip
Remove R wire
from air conditioner
control (24 volt AC
power)
®
icomfort enabled
Remove control wires
from i+ and i− terminals
Place jumper on
FIELD TEST
(E33 pins)
Connect R wire to air
conditioner control (24
volt AC power)
Status LED lights DS11
and DS14 will blink and
then on continuously.
The lights must be on
continuously to proceed
to the next step.
Remove jumper
from FIELD
TEST (E33 pins)
between 2 to 10
seconds.
Figure 26. Main Control (A175) Unit Nominal Capacity Code Configuration (XC21−XXX−230−04 and 05)
XC21
®
Non − icomfort
enabled Remove
control wire from Y1
terminal
Place jumper on FIELD
TEST (E33 pins) within 2 to
10 seconds after removal
The air conditioner control´s DS11 and
DS14 LEDs will start blinking the Unit
Nominal Code at three (3) second
intervals starting at 1−ton through to
6−ton. If a code is not selected, the air
conditioner control will cycle one more
time through the codes before defaulting
back to the idle mode (simultaneous
slow flash).
Long blink ON red LED (DS14) to
indicate tonnage and solid ON green
LED (DS11) to indicate ½ tonnage.
alert code 313, indoor and outdoor unit capacity mismatch
error code, or alert code 34, must program unit capacity for
outdoor unit. Use figure 26 to configure the unit normal
capacity code.
DS14 (Red)
DS11 (Green)
Field Test
(E33)
DS12
Communicating
Status Indicator
Sensor harness
must be attached
to air conditioner
control.
When the required Unit Capacity Code
is displaying on the LEDs, remove
FIELD TEST jumper from pins (E33).
LEDs will continue to display the
selected unit capacity code for two (2) minutes
before defaulting back to the idle mode
{simultaneous slow flash}, or until the 24 volt
power is cycled to the air conditioner control.
Model
−012
−018
−024
−030
−036
−042
−048
−054
−060
−066
−072
Page 48
FINISH
Connect R wire to air
conditioner control (24
volt AC power)
Reconnect any control
wiring previously
removed.
Remove R wire from
air conditioner control
(24 volt AC power)
DS11
Green DS14
Size
LED Red LED
1−ton
OFF 1 long flash
1.5−ton
ON 1 long flash
2−ton
OFF 2 long flashes
2.5−ton 2 long flashes
ON
3−ton
OFF 3 long flashes
3.5−ton
ON 3 long flashes
4−ton
OFF 4 long flashes
4.5−ton 4 long flashes
ON
5−ton
OFF 5 long flashes
5.5−ton
ON 5 long flashes
6.0−ton
OFF 6 long flashes