42
XC20
Configuring Unit
When installing a replacement outdoor control, the unit selection code may have to be manually assigned using the 7-seg
ment display and push button on the control. The unit code sets unit type, capacity and outdoor fan RPM.
Outdoor control is in IDLE mode
(No heating or cooling demand)
To enter unit selection
mode, push and hold the
button next to the 7-segment
display until dash symbol
appears and immediately
release button. Once dash
starts flashing, proceed to
next step.
Turn room thermostat
to OFF
Push and hold button until the solid
sequence is displayed on the
7-segment display then immediately
release the button. This
configuration sequence allows the
installer to select unit selection code
(number combination) that matches
the outdoor unit type and inverter.
If three horizontal bars display in any
part of the 7-segment display string
during power-up, the outdoor
control did not store the unit
selection code. If this occurs, the
configuration sequence for that
section of the display string must be
repeated.
Yes
No
−
−
−
_
_
−
−
−
NOTE - Either the PU sequence
will repeat 5 times and if a
selection is not made the control
will return to idle mode.
NOT
SELECTED
SELECTED
Configuring Unit Selection Code
Power-up - Unit selection code (two-digit number) displayed
represents unit size code (outdoor unit capacity).
During initial power-up, firmware version, unit type, unit capacity
and unit selection code will appear on the 7-segment display.
17
19
21
22
24
26
28
29
2-TON HEAT PUMP (XP20-024)
3-TON HEAT PUMP (XP20-036)
4-TON HEAT PUMP (XP20-048)
5-TON HEAT PUMP (XP20-060)
2-TON AIR CONDITIONER (XC20-024)
3-TON AIR CONDITIONER (XC20-036)
4-TON AIR CONDITIONER (XC20-048)
5-TON AIR CONDITIONER (XC20-060)
SELECTED
NOT
SELECTED
UNIT SELECTION
CODE
1. When the correct unit section code is displayed, release but
ton immediately. [Display flashes.]
2. Push and hold button until selection stops flashing during
one of the three cycles. [Release push button]
3. If selection is not made during those three cycles the control
returns to idle mode.
The outdoor control stores the unit type, automatically exits the con
figuration mode and resets.
UNIT SELECTION
CODES
Press and hold the button during
the cycling display.
UNIT
EXAMPLE 7-SEGMENT DISPLAY STRING
FIRMWARE
VERSION
UNIT
TYPE
UNIT
CAPACITY
UNIT
CODE
.
IDLE MODE
(NO DEMAND)
.
If three horizontal bars are shown in the 7-segment display
during power-up, the outdoor control did not store the last
configuration setting. If this happens, the configuration se
quence for that setting must be repeated.
Figure 20. Configuring Unit Selection Code
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