TCL
Air Conditioner Service Manual
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
less than 23°C (cold air prevention wind temperature) when the fan stops running (including
temperature dropping when compressor operating, not including the compressor’s starting up course),
and the machine runs into defrosting according to any one condition as below.
7
