Lennox XC20-036-230-01 Installation And Service Procedure page 36

POWER-UP / RESET:
FIRMWARE VERSION: During initial power-up or reset, the
first item displayed is the outdoor control firmware version.
Example to the right shows firmware version 2.3.
UNIT TYPE: The next item displayed is the self discovery
unit type. AC = air conditioner and HP = heat pump. If the
unit type cannot be determined, three bars appear.
UNIT NOMINAL CAPACITY: The next item to be displayed
is the self-discovery unit nominal capacity. Valid capacities
are 24 for 2-ton, 36 for 3-ton, 48 for 4-ton and 60 for 5-ton
units. If the unit type cannot be determined, three bars ap­
pear.
UNIT CODE: The next item to be displayed is the self discov­
ery unit code. (may be a single character or two characters).
If the unit code cannot be determined, three bars appear.
UNIT CODE
UNIT TYPE, SIZE AND MODEL
NOT PROGRAMMED
1 7
2-TON HEAT PUMP, XP20-024
1
9
3-TON HEAT PUMP, XP20-036
2
1
4-TON HEAT PUMP, XP20-048
2 2
5-TON HEAT PUMP, XP20-060
2
4
2-TON AIR CONDITIONER, XC20-024
2 6
3-TON AIR CONDITIONER, XC20-036
8
2
4-TON AIR CONDITIONER, XC20-048
2 9
5-TON AIR CONDITIONER, XC20-060
XC20
Figure 15. Outdoor Control 7-Segment Unit Status Displays
7-SEGMENT POWER-UP DISPLAY STRING
2
A C
OR
2
2
THROUGH
(These are just examples of firmware version, unit type,
unit nominal capacity and unit codes.)
7-SEGMENT POWER-UP DISPLAY STRING EXAMPLE
.
2 3 A C
FIRMWARE UNIT
VERSION TYPE
36
.
3
H P
OR
4
OR
1 4
OR
2 4 1 4
UNIT UNIT
CAPACITY CODE
.
IDLE MODE