Air Conditioner Service Manual
the four-way valve will close 2min later after shut-down the compressor.
6) Defrosting function:
During defrosting, once mode changing, economic operation or temperature setting signals received, the
buzzer and display will make response immediately, but the other operations won’t implement until
defrosting finished;
During defrosting, the signals of On-Off, Timing, Sleep, Fan speed and/or Swing can respond, but the
Fan speed and/or Swing should be in accordance with operation for Cold Air Prevention.
Except the above signal processing during defrosting, no other signals will deal with, only a voice of
buzz for response.
During defrosting, electrical heating (optional function) stops compulsively.
Defrosting Enter and Exit program:
Option 1
with jumper JC
The condition of enter defrosting: run into defrosting once any of condition 1, 2, and/or 3 met.
Condition 1：As shown in figure 3
Definition:
The following conditions a, b and c all required to meet:
a.
IPT1 settles for IPT1＝IPTmax－△IPT
b.
t5≥50min（running time t5≥50min（the compressor runs cumulatively）, t5 is removable， and could
be less than t1）
c.
IPT＜40°C，and lasts 2min。
Running into defrosting on condition 1, the first running time of set defrosting is F (8min); after running a
defrosting cycle, the defrosting time should be determined and adjusted.
Figure 3
Condition 2: When running time is more than or equal to 120 min (compressor is running
accumulatively), the indoor temperature is less than 35°C for 2 min sustained. Running into defrosting
under condition 2, defrosting time set is 8 min.
Condition 3: After the compressor is operating for 20min continuously, the indoor pipe temperature is
To Next Page
Loading...
