Lennox Signature XP21 Series Installation And Service Procedure page 56

Configuring Outdoor Fan Speed (Note − Control must be in Idle Mode)
Display Code
PF
Solid
PF
Blinking
Configuring Unit Capacity (Note − Control must be in Idle Mode)
PC
Solid
PC
Blinking
Display Code
Pt
Solid
Pt
Blinking
XP21
Procedure
Release push button Allows user to select outdoor fan RPM profile. IMPORTANT: New control may need to be
manually configured to validate outdoor unit fan RPM setting is correct for unit capacity. Refer to RPM table on unit
wiring diagram.
Push and hold button Outdoor control will display a fan RPM profile 3 seconds. When the correct fan RPM profile
is displayed, release button. Selected code will flash for a 10 second period. During that period, hold push button for
3 seconds to store code. Once code is stored control will automatically exit field test mode. If 10 second period
expires or push button is held less than 3 seconds, control will automatically exit field test mode and go into idle
mode without storing fan RPM profile. Repeat procedure to correct.
Release push button
Allows user to select Unit Capacity. IMPORTANT: Field replacement control may need to be
manually configured to validate outdoor unit capacity. Refer to unit nameplate model number for capacity in 1,000 of
BTUs. (18, 24, 30 ,36,42 48, 60)
Push and hold button Control will display unit capacity number 3 seconds. When the correct unit capacity number
is displayed, release button. Selected code will flash for a 10 second period. During that period, hold push button for
3 seconds to store code. Once code is stored control will automatically exit Field Test Mode. If 10 second period
expires or push button is held less than 3 seconds, control will automatically exit field test mode and go into idle
mode without storing unit capacity Number. If this happens, configuring procedure must be repeated.
Table 10. Field Test and Program Menu Options (continued)
Procedure
Release push button Allows user to select type and number of stages on outdoor unit.. IMPORTANT: Field re-
placement control may need to be manually configured to validate outdoor unit fan RPM setting is right for unit ca-
pacity. See RPM table on unit wiring diagram for proper RPM settings. Type and number of stages: 1AC, 2AC, 1HP,
2HP – AC – air conditioning and HP – Heat Pump
Push and hold button Control will display type and number of stages 3 seconds. When the correct type and num-
ber of stages is displayed, release button. Selected code will flash for a 10 second period. During that period, hold
push button for 3 seconds to store code. Once code is stored control will automatically exit field test mode. If 10
second period expires or push button is held less than 3 seconds, control will automatically exit field test mode and
go into idle mode without storing type and number of stages. If this happens, configuring procedure must be re-
peated.
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