Lennox Signature XP21 Series Installation And Service Procedure page 55

Error Code Recall Mode (Note − control must be in idle mode)
E
Solid
-
-
Solid
-
c
Solid
c
Blinking
*Note once the error history is deleted it cannot be recovered. After the history is deleted, the unit will reset itself.
Display and action (normal operation)
Display
Display string displays > number of unit stages > pause >
Power −UP
outdoor fan. If 3 horizontal bars are displayed during any sequence of this string, it indicates that the specific parameter is not
configured.
.
Idle mode
A
in the display string represents the ambient temperature in F
A
at the outdoor sensor on the outdoor unit.
d
− dehumidification mode string >
RPM > pause >
d
mode. IMPORTANT: On 2−stage unit R to DS link must be cut
and correct RPM outdoor fan profile selected for outdoor fan to
operate at lower RPM speed when EDA is active.
d F displays when system is in defrost mode − unit must be running in heating mode, outdoor ambient must be below 65F and
d F
outdoor coil temperature must be below defrost termination temperature.
F
in the display string indicates RPM setting output on
F
terminals PWM and com (used with EBM motors). RPM
displayed does not apply to motor connected on ECM Y1 and
ECM Y2.
Heat stage 1 string display > pause >
H1
repeat mode.
Heat stage 2 string display > pause >
H2
mode.
Cool stage 1 string display > pause >
C1
repeat mode.
Cool stage 2 string display > pause >
C2
mode.
Table 22. Error Recall Menu Options
To enter error code recall mode, push and hold button until solid E appears, then release button. Control will display
up to 10 error codes stored in memory. If E000 is displayed, there are no stored error codes.
To exit error code recall mode push and hold button until solid three horizontal bars appear, then release button.
Note − Error codes are not cleared.
To clear error codes stored in memory, continue to hold push button while the 3 horizontal bars are displayed. Re-
lease push button when solid c is displayed.
Hold push button for three seconds to confirm command to delete codes. Error codes are cleared.
Table 23. Field Test and Program Menu Options
decimal blinks at 1 Hertz > 0.5 second ON, 0.5 second OFF
d
pause>
A
(ambient temp displayed) > pause > repeat
F
outdoor fan RPM displayed > pause >
F
outdoor fan RPM displayed > pause >
F
outdoor fan RPM displayed > pause >
F
outdoor fan RPM displayed > pause >
Display and action (configuration and test mode)
AC HP
or unit > pause > unit capacity in BTUs > pause > RPM setting of
A
Enter test mode: Display will string active error code(s)
A
ambient , coil
door unit.
d
Enter test mode: Forced defrost. (System must be config-
ured as HP. Unit must be running in heating mode). Test de-
F
(Outdoor fan)
frost will terminate when coil terminate temperature is
reached (or 10 seconds, whichever is longer) or 14 minutes if
coil temperature remains below terminate temperature or by
pushing button down for less than 2 seconds. Enter
mode: Display will string active error codes
c
and discharge
F
Enter test mode: Control outputs DC Voltage onto PWM
and com terminals. Outdoor fan will cycle ON for 10 minutes
at 490 RPM. To exit test − Push and hold button until three hor-
izontal bars display. Release button, outdoor fan will cycle
OFF. (Test DOES NOT output DC voltage to ECM Y1 and
ECM Y2 terminals)
A
A
(ambient temperature displayed > pause > repeat
Page 55
c d
temperature in F at out-
and discharge
E
d
temperature in F at outdoor unit.
A
(ambient temperature displayed > pause >
ambient temperature displayed > pause > repeat
A
(ambient temperature displayed > pause >
E
,
A
test
A
, ambient , coil
XP21