9. Electrical Control Functions
3.1 Refrigerant diagram
Outdoor electric control functions:
-47-
1. Switch setting and functions:
No Item
A8
Set in factory
Switch function: SW5-1---outdoor fan motor selection, ON: DC fan motor; OFF: AC fan
motor
C1
Switch function: SW5-2---defrosting data setting, ON=6degree, OFF＝8degree (set
when out of factory).
For the place where is easy to frost, it is 6 degree; for the place hard to frost, it is 8
degree.
C2
Switch function: SW5-3，SW5-4---piping length selection, the set data is M when out of
factory.
S（SW5-3=OFF SW4=ON） L（SW5-3=ON SW4=OFF）
- （SW5-3=ON SW4=ON） M（SW5-3=OFF SW4=OFF）
C3
Switch function: SW5-5，SW5-6---outdoor horse power selection (for different outdoor,
the current limitation is different too. The corresponding selection must be taken, or
the module protection will occur. )
2HP（SW5-5=OFF SW5-6=ON） 2.5HP（SW5-5=ON SW5-6=OFF）
3HP （SW5-5=ON SW5-6=ON） 3.5HP（SW5-5=OFF SW5-6=OFF）
C4
Switch function: SW5-7，SW5-8：
SW5-7－pre-set, set as OFF when out of factory.
SW5-8－silent operation function, ON---available, OFF---not available (set when
out of factory)
When it is ON, the max. fan speed is Class-6, and the max. running frequency is 10Hz.
C8
Set in factory
2. Defination of 4-bit dip switch SW5 on failure indicator board:
1 2 3 4 Defination
OFF OFF OFF OFF State when out of factory (normal state)
OFF ON OFF OFF
Compulsory cooling: frequency 60HZ, outdoor fan motor Class-7, fixed open angle
300, the others are in normal state
ON OFF OFF OFF
Compulsory heating: frequency 50HZ, outdoor fan motor Class-5, fixed open angle
300, the others are in normal state
OFF OFF ON OFF
Rated operation: auto changeover for cool/heat, max. frequency 53HZ(E) in cooling,
and max. frequency 72HZ(E) in heating, the frequency is set automatically in other
states.
3. Main control functions
3.1 Refrigerant diagram
Commercial Air Conditioner Model: AU18/222XFERA
AS072/092/122XVERA
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