8-24
CONTROL SYSTEM
Revision Y05-01
Service Manual - DNC Series
changed. COMP & OFAN are forced OFF when ICT =< -6
o
c, and
are kept OFF until ICT > 14
o
c.
2. For WAX model, the defrost processes is simpler. When J7 is
open, COMP & OFAN are forced OFF when ICT =< -1
o
c, and are
kept OFF until ICT > 5
o
c. When J7 is closed, the WAX defrosting
process is the same as that of the other models (R.H.S. of the
graph above). In both cases, the ICT checking in t2 and t3 are not
applied.
7.1.2. High Pressure Protection
Mode: (Auto) Cooling or Dry
Temp: Selected desired temp.
Fan: Any
Timer: Any
I Feel: On or Off
Control Function
To protect the COMP from the high pressure built-up in the outdoor
coil during normal cooling operation, by switching OFF the IFAN and
COMP.
OCT [
o
c]
Any
OFF
Any
ON
Any
Blink
ON
COMP
OFAN
IFAN
OPER
LED
52
55
61
66
L
COMP is forced OFF
OFAN is forced ON
IFAN forced
to LOW
68
OFAN follow operation of
COMP
COMP is forced OFF
OFAN is forced ON
For all models except WAX & P2000 For WAX & P2000 models
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