Heat Controller Energy Knight B/A-HMC30AS Service Manual page 16

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
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.+0.5 C
Desired Temp.
Desired Temp.-0.5 C
Desired Temp.-1.0 C
100 %
Comp
40 %
0 %
60 %
Comp
40 %
Outdoor Fan
Indoor Fan
>).
a
6 mins.
OFF ON
OFF ON
OFF ON
ON ON
MAX. MAX.
MIN. MAX.
Controlled at the Indoor Unit
>).
of 1) is repeated in a series of 2 times.
b
6 mins. 6 mins.
ON OFF
OFF ON
ON ON
ON ON
MIN. MAX. MIN. MAX.
- 16 -
>)..
c
3 mins
Off ON
OFF
ON
Off
ON
MAX.
MIN. Off