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7.7.6 Defrosting mode
1)
Condition of defrosting.
Condition 1: If T4＞0℃,
When the units are running, if the following two items are satisfied the units start defrosting:
3 minutes.
3 minutes.
Condition 2: If T4＜0℃,
The program judges according to the condition 1, if the two items are satisfied, then judges if T2 has
descended for more than 5℃, if it has the machine starts defrosting, or continues to judge T2 and will
not defrost until T2 drops more than 5℃.
Condition 3: No matter what value T4 is, if the machine runs with T3＜3℃ for more than 120 minutes and T3
keeps lower than -2℃ for more than 3 minutes, the machine will defrost, no matter if T2 drops for more than 5℃
or not.
2)
Condition of ending defrosting.
If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating
mode.
a)
T3 rises to be higher than 12℃.
b)
T3 rises to be higher than 8℃ and remains for 80 seconds.
c)
The machine has run for 10 minutes in defrosting.
7.7.7
Defrosting action
on
compressor
off
on
4-way valve
off
on
outdoor fan
off
indoor fan
off
indoor fan breeze 10s
7.7.8 Rating capacity test function
1)
Set the indoor unit with remote controller as: high fan, 30℃ in heating mode, then press "TURBO"
button on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the
a) The units runs with T3＜3℃ for 40 minutes and T3 keeps lower than -6℃ for more than
b) The units runs with T3＜3℃ for 80 minutes and T3 keeps lower than -4℃ for more than
on
90s
100s
no longer than 10 minutes
F8
30s
25
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