Algorithm & Control
25
2.18 Rotation Regulating Functions
Upper limit rotation
Limit rotation
Command rotation
Starting rotation
∆
T
Defrost*
Lower limit rotation
Target rotation
* Defrost control for heat pump model only
2.18.1 Starting Rotation
Starting Control
To avoid excessive oil discharge from compressor or to promote oil lubrication during startup.
To prevent liquid flood back to the compressor.
To limit starting current.
When compressor starts to rotate from OFF to ON, compressor rotation is set to run gradually to each upper
limit at a specific timer setting.
Model
a Hz
(Time, s)
b Hz
(Time, s)
c Hz
(Time, s)
d Hz
(Time, s)
Max Hz
(Time, s)
RK(X)B09/12AXVJU
RK(X)N09/12AXVJU
40 (180)
54 (420)
72 (180)
90 (120)
-
RK(X)B18/24AXVJU
RK(X)N18/24AXVJU
55 (120)
70 (200)
85 (470)
-
-
2.18.2 Command Rotation
Cut in upon termination of Starting Control.
Achieve capacity control by controlling the compressor rotation based on:
• Temperature difference between set and room temperature, ∆T.
•
Limit Rotation.
•
Defrost control.
Compressor
rotation, f
Time (min)
d
c
b
a
1
2
