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. Use the procedure provided in figure 36 to set the unit nominal capacity code.

START

Set room thermostat

to OFF

Go to control terminal

strip

Remove R wire

from control (24 volt

AC power)

 

 

 

 

 

 

 

icomfort®

 

 

Non − icomfort®

enabled

 

 

enabled

Remove control

 

 

Remove control

wires from i+ and

 

 

wire from Y1

i− terminals

 

 

terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DS14 (Red)

DS11 (Green)

Field Test

STRIP

 

(E33)

TERMINAL

DS12

 

Communicating

 

Status Indicator

 

Sensor harness

 

must be attached

 

to air conditioner

 

control.

 

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)

Place jumper on

 

 

FIELD TEST

 

 

(E33 pins)

 

Place jumper on FIELD

 

 

 

 

TEST (E33 pins) within 2 to 4

 

 

seconds after removal

Connect R wire to control

 

 

(24 volt AC power)

 

 

 

 

The control´s DS11 and DS14 LEDs will

 

 

start blinking the Unit Nominal Code at

 

 

three (3) second intervals starting at 1−ton

Status LED lights DS11

 

through to 6−ton. If a code is not selected,

and DS14 will blink and

 

the control will cycle one more time

then on continuously.

 

through the codes before defaulting back

Once both LEDs are on

 

to the idle mode (simultaneous slow

continuously then remove

 

flash).

jumper immediately from

 

 

E33.

 

 

If jumper is not removed

 

 

immediately from E33, then DS11

 

 

and DS14 LEDs will resume

 

Long blink ON red LED (DS14) to indicate

blinking again.

 

 

tonnage and solid ON green LED (DS11)

 

 

 

 

to indicate ½ tonnage.

YES

 

 

Jumper

 

removed

 

successfully

 

Remove R wire

NO

 

from control (24 volt

 

 

 

AC power)

 

 

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.

 

 

 

 

DS11

 

 

 

 

 

Green

DS14

 

 

Model

Size

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

ON

2 long flashes

 

 

−036

3−ton

OFF

3 long flashes

 

 

−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

OFF

6 long flashes

 

 

 

 

 

 

Figure 36. Heat Pump Control (A175) Unit Nominal Capacity Code Configuration

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Lennox International Inc 506586-01 installation instructions Strip, Start, Terminal, Finish, Field Test