Lennox XP21 Series Installation Instructions Manual page 54

HEAT PUMP CONTROL (A175) UNIT NOMINAL CAPACITY CODE CONFIGURATION
In a communicating system, if the room thermostat is indicating either a error code 313, indoor and outdoor unit capacity
mismatch error code, or error code 34, must program unit capacity for outdoor unit (see figure 38).
START
Set room thermostat
to OFF
Go to control terminal
strip
Remove R wire
from 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 control
(24 volt AC power)
Status LED lights DS11
and DS14 will blink and
then on continuously.
Once both LEDs are on
continuously then remove
jumper immediately from
E33.
If jumper is not
immediately from E33, then DS11
and DS14 LEDs will resume
blinking again.
Remove R wire
from control (24 volt
AC power)
Figure 38. Heat Pump Control (A175) Unit Nominal Capacity Code Configuration
506601−01
®
Non − icomfort
enabled
Remove control
wire from Y1
terminal
Place jumper on FIELD
TEST (E33 pins) within 2 to 4
seconds after removal
The 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 control will cycle one more time
through the codes before defaulting back
to the idle mode (simultaneous slow
flash).
removed
Long blink ON red LED (DS14) to indicate
tonnage and solid ON green LED (DS11)
to indicate ½ tonnage.
YES
Jumper
removed
successfully
NO
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.
Page 54
FINISH
Connect R wire to
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
Model
LED Red LED
−012 1−ton
OFF 1 long flash
−018 1.5−ton
ON 1 long flash
−024 2−ton
OFF 2 long flashes
−030 2.5−ton 2 long flashes
ON
−036 3−ton
3 long flashes
OFF
−042 3.5−ton
ON 3 long flashes
−048 4−ton
OFF 4 long flashes
−054 4.5−ton
ON 4 long flashes
−060 5−ton
OFF 5 long flashes
−066 5.5−ton
ON 5 long flashes
−072 6.0−ton
6 long flashes
OFF