Lennox 14HPX?018 Installation Instructions Manual page 21

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.
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
operation will be
executed until the test shorted). If a fault exists, the unit
short is removed and will remain in Heat Mode and no
reapplied.
Figure 22. Test Mode
Page 21
fault lockout function, if applicable.
If in HEATING Mode
The controller will check for
ambient and coil faults (open or
further test mode operation will
be executed until the test short
is removed and re applied. If
no fault exists and ambient
temperature is below 35ºF, the
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.
14HPX SERIES