2. Outdoor Coil High Pressure Protection
The out-coil high pressure protection prevent the build up of high pressure at the out-coil during cooling
operation.
OCT [
o
c]
ANY
OFF
ANY
ON
ANY
BLINK
ON
COMP
OFAN
IFAN
OPER
LED
52
55
61
64
L
OFAN follow operation of COMP
COMP is forced OFF
OFAN is forced ON (Note 1)
IFAN is forced LOW
Note 1:
In some applications, the outdoor fan and the compressor are controlled together by the COMP
relay output from the controller. In this case, it will take more time for the out-coil to cool down
during the high pressure protection, because the outdoor fan will be turned off with the
compressor instead of working as in the graph above.
25
Summary of Contents for GR451R
Page 13: ...4 REFRIGERANT FLOW DIAGRAM 10...
