Page 12
If in
COOLING
Mode
If in
HEATING
Mode
If in
DEFROST
Mode
Short test pins for longer
than 1
second but less
than 2.0 seconds
Short test pins for
more than 2.0 seconds
Y1 Active (0" line inactive)
Test Mode
Test pin short REMAINS in place for more than 5 seconds
Test pins short REMOVED before a
maximum of 5 seconds
Clear any short cycle lockout
and 5 strike pressure fault
lockout function, if applicable.
No other functions will be
executed and unit will
continue in the mode it was
operating.
No further test mode
operation will be
executed until the test
short is removed and
reapplied.
The controller will check for
ambient and coil faults (open or
shorted). If a fault exists, the
unit will remain in Heat Mode
and no further test mode
operation will be executed until
the test short is removed and re
applied. If no fault exists, the
unit will go into 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.
Clear any short cycle lockout or 5 strike
pressure fault lockout function.
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.
The unit will remain in Defrost mode
until termination on time or temperature
FIGURE 16
