Heat Controller Energy Knight B/A-HMC30AS Service Manual page 21

9. Heating Operation - 4th Stage
1) Operation
: This stage is decided as Small Load during operation stage of the previous E. Load, 60% compressor operation is mostly
used in this stage.
2) Condition to shift next operation stage
: It shifts into the assigned stage from the current stage when the following condition happens.
a. [Restart Time of 40% Compressor] should be checked when the Room Temperature is maintained under
[Desired Temp. – 3.0] for 3-minutes after operating compressor.
If the Restart Time pass, 40% compressor would be started.
If the Time doesn't pass, the current condition should be maintained until it reaches at the Time and 40% compressor-
would be restarted after passing this Time.
In the above and
[Desired Temp.] after starting 40% compressor.
The Heating Operation-3rd Stage would be operated when the operations such as the above
times inconsecutively.
b. The Heating Operation-3rd Stage would be operated when the room temperature is under [ Desired Temp. -1°...] more
than 10-minutes after compressor operation.
c. The Heating Operation-3rd Stage would be operated when the current operation is performed more than 1 hour.
d. The Heating Operation-1st Stage would be operated when the temperature falls under -3°... one time during 3-mins after
compressor OFF.
3) Operation Diagram
Room Temp.
Desired Temp. +0.5 C
Desired Temp.
Desired Temp. – 0.5 C
40%
Comp.
60%
Outdoor Fan
Indoor Fan
, 40% compressor operation would be suspended when the room temperature reaches at
OFF OFF OFF
OFF ON OFF
OFF MAX. OFF
OFF OFF
ON OFF
MAX. OFF
Controlled at the Indoor Unit
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and are performed 2
OFF OFF
ON OFF
MAX. OFF