Kaysun KSDA-35 DVR14, Technical Manual

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 Page 30 

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1.4  Fan Mode

When fan mode is activated:

•  The outdoor fan and compressor are stopped.
•  Temperature control is disabled and no temperature 

setting is displayed.

•  The indoor fan speed can be set to 1%~100%, or low, 

medium, high and auto.

•  The louver operations are identical to those in cooling 

mode.

•  Auto fan: In fan-only mode, AC operates the same as 

auto fan in cooling mode with the temperature set at 
24°C.

1.5  Cooling Mode

1.5.1  Compressor Control

Reach the configured temperature:

1)  When the compressor runs continuously for less than 

120 minutes.

•  If the following conditions are satisfied, the 

compressor ceases operation.

•  While calculated frequency(fb) is less than minimum 

limit frequency(FminC).

•  While protective time is more than or equal to ten 

minutes.

•  While T1 is lower than or equal to (Tsc-CDIFTEMP-

0.5°C)

2)  When the compressor runs continuously for more than 

120 minutes.

•  If the following conditions are satisfied, the 

compressor ceases operation.

•  When calculated frequency(fb) is less than minimum 

limit frequency(FminC).

•  When protective time is more than or equal to ten 

minutes.

•  When T1 is lower than or equal to (Tsc-CDIFTEMP).

3)  If one of the following conditions is satisfied, not judge 

protective time.

•  Compressor running frequency is more than test 

frequency.

•  When compressor running frequency is equal to 

test frequency, T4 is more than 15°C or T4 fault. 

•  Change setting temperature.
•  Turbo or sleep function on/off
•  Various frequency limit shutdown occurs.

1.5.2  Indoor Fan Control

1)  In cooling mode, the indoor fan operates continuously. 

The fan speed can be set to 1%-100%, or low, 
medium, high and auto.

2)  Auto fan action in cooling mode:

•  Descent curve

•  When T1-Tsc is lower than or equal to 3.5°C, fan 

speed reduces to 80%;

•  -When T1-Tsc is lower than or equal to 1°C, fan 

speed reduces to 60%;

•  -When T1-Tsc is lower than or equal to 0.5°C, fan 

speed reduces to 40%;

•  -When T1-Tsc is lower than or equal to 0°C, fan 

speed reduces to 20%;

•  -When T1-Tsc is lower than or equal to -0.5°C, fan 

speed reduces to 1%.

•  Rise curve

•  When T1-Tsc is higher than 0°C, fan speed 

increases to 20%;

•  -When T1-Tsc is higher than 0.5°C, fan speed 

increases to 40%;

•  -When T1-Tsc is higher than 1°C, fan speed 

increases to 60%;

•  -When T1-Tsc is higher than 1.5°C, fan speed 

increases to 80%;

•  -When T1-Tsc is higher than 4°C, fan speed 

increases to 100%.

1.5.3  Outdoor Fan Control

•  The outdoor unit will be run at different fan speed 

according to T4 and compressor frequency.

•  For different outdoor units, the fan speeds are 

different.

1.5.4  Condenser Temperature Protection

When the condenser temperature exceeds a configured 
value, the compressor ceases operation.