Lennox XP14 SERIES Unit Information page 7

Short test pins for longer
than 1 second but less than
2 seconds
Clear any short cycle lockout
and 5 strike fault lockout
function, if applicable. No
other functions will be
executed and unit will
continue in the mode it was
operating.
Test pin short REMAINS in place for more than 5 seconds
The unit will return to Heat mode uncalibrated with defrost
timer set for 34 minutes. No further test mode operation will
be executed until the test short is removed and re applied.
Defrost Control Pin Operation
Y1 Active ( 0" line inactive)
Short test pins for more than 2 seconds
Clear any short cycle lockout and 5 strike
If in COOLING Mode
No further test mode The control will check for ambient
operation will be and coil faults (open or shorted).
executed until the test
short is removed and
further test mode operation will
reapplied.
be executed until the test short is
temperature is below 35ºF, the
FIGURE 7
Page 7
fault lockout function, if applicable.
If in HEATING Mode
If a fault exists, the unit will
remain in Heat Mode and no
removed and re applied. If
no fault exists and ambient
unit will go into Defrost mode.
Test pins short REMOVED before a
maximum of 5 seconds
The unit will remain in Defrost mode
until termination on time or temperature
If in DEFROST Mode
The unit will terminate
defrost and enter Heat
Mode uncalibrated with
defrost timer set for 34
minute test. No further
test mode operation will
be executed until the test
short is removed and
reapplied.