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4. Cooling Operation - 2nd Stage
1) Condition to decide operation stage
- If Room Temp. reaches at [Desired Temp. + 0.5°C] for 2 consecutive mins. after suspension of 60% compressor operation
(<°C 3, ,
>), [Required time to restart 60% compressor] would be examined.
60% compressor would be restarted when [Required time to restart 60% compressor] is passed (<°C 3,
>)..
The current condition would be maintained when it reaches at [Required time to restart 60% compressor], if [Required
time to restart 60% compressor] is not passed (<°C 3,
>).
2) Condition to shift operation stage
1] It shifts to the Cooling Operation- 1st Stage when the operation such as
of 1) is repeated in a series of 2 times.
2] 40% compressor operation would be suspended when the Room Temp. goes down to [Desired temp. – 1.0°C] after stop-
ping 60% compressor operation (<°C 3,
>).
It shifts to the Cooling Operation-3rd Stage when the 40% compressor operation is suspended in a series of 2 times by
falling of room temperature after stopping 60% compressor operation.
3] It starts 60% compressor operation immediately and returns to the initial stage of Cooling Operation-2nd
Stage when the single operation time of 40% compressor pass more than 1 hour.
3) Operation Diagram
Room Temp.
Desired Temp.
Desired Temp.+0.5
°
C
Desired Temp.-1.0
°
C
Desired Temp.-0.5
°
C
Comp
60 %
40 %
Outdoor Fan
Indoor Fan
OFF
OFF
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
ON
Off
Off
MAX.
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
MIN.
Off
b
c
a
ON
ON
MAX.
ON
ON
MAX.
6 mins.
6 mins.
6 mins.
100 %
40 %
0 %
Comp
3 mins
Controlled at the Indoor Unit
