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Auto fan action:
For cassette:
1.3.3.3 Defrosting mode：
For 1-phase outdoor units:
Condition of defrosting:
l
AC will enter defrosting mode if any of the following items is satisfied.
A: For DL, high static pressure duct & cassette :The compressor keeps running over 40 minutes and T3＜
-2℃
For A5 duct: T3<0℃ and the compressor keeps running over 45 minutes. Meanwhile T3＜-3℃ for
3minutes.
B: After the last defrosting, the time that the outdoor fan is off but the compressor is on in high T2 protection
cumulates up to 90 minutes.
Condition of ending defrosting:
l
If any one of the following items is satisfied, the defrosting will terminate and the machine will turn to normal
heating mode.
A: T3 rises to be higher than 20℃.
B: The machine has run for 10 minutes in defrosting.
Defrosting action：
l
For A5 duct:
Electrical Control
T2
Setting
TE14+2℃
TE14
Low for15s, then
off
T1-TS
3°C
1°C
Low
High
Electrical Control Function
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