4) If the compressor cumulate running time is
up to 30 minutes and T4-T3 > (0.5T4+
KDELTT_ADD), T3 < TCDIN5_ADD, T4＞-22℃
(-7.6°F).
5) If the compressor cumulate running time is
up to TIMING_DEFROST_TIME and T4≦-22℃
(-7.6°F).
6) T3 is lower than 3°C(37.4°F) and the
compressor cumulate running time is up to 120
minutes, at this time, if T3≦TCDI1+4℃(39.2°F)
for 3 minutes.
Condition of ending defrosting:
If any one of the following items is satisfied, the
defrosting will finish and the machine will turn to
normal heating mode.
----T3 rises to be higher than TCDE1.
----T3 keeps to be higher than TCDE2 for 80
seconds.
----The machine has run for 15 minutes in
defrosting mode.
If the fifth item is satisfied and any one of the
following items is satisfied, the defrosting will
finish and the machine will turn to normal
heating mode.
----T3 rises to be higher than 10℃(50°F).
---The machine has run for 10 minutes in
defrosting mode.
If the sixth item is satisfied and any one of the
following items is satisfied, the defrosting will
finish and the machine will turn to normal
heating mode.
----T3 rises to be higher than TCDE1+4 ℃
(39.2°F).
----T3 keeps to be higher than TCDE2+4 ℃
(39.2°F) for 80 seconds.
----The machine has run for 15 minutes in
defrosting mode.
Defrosting action：
compressor
4-way valve
Outdoor fan
膨胀阀
OFF
ON
ON
ON
OFF
OFF
ON
ON
f2
No longer than 15 min
10s
PMV_NOR_HEAT_DEFORST_
EE
480步 480步
正常化霜示意图
阶段1 阶段2 阶段3
阶段4
阶段5
DEFORSTFRE_ADD
For other outdoor units,
If any one of the following items is satisfied, AC
will enter the defrosting mode.
After the compressor starts up and keeps
running, mark the minimum value of T3 from
the 10th minutes to 15th minutes as T30.
1)If the compressor cumulate running time is up
to 29 minutes and T3< TCDI1, T3 ＋
T30SUBT3ONE≦T30.
2)If the compressor cumulate running time is up
to 35 minutes and T3< TCDI2, T3 ＋
T30SUBT3TWO≦T30.
3)If the compressor cumulate running time is up
to 40 minutes and T3< TCDI3 for 3 minutes.
4) If the compressor cumulate running time is
up to 30 minutes and T4-T3 > (0.5T4+
KDELTT_ADD) and T3 < TCDIN5_ADD.
Condition of ending defrosting:
If any one of the following items is satisfied, the
defrosting will finish and the machine will turn to
normal heating mode.
----T3 rises to be higher than TCDE1.
----T3 keeps to be higher than TCDE2 for 80
seconds.
----The machine has run for 10 minutes in
defrosting mode.
Defrosting action：
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