Daikin RZQ Series FCQ20EVA Service Manual page 44

Function Details
4.2.6 Frequency Step Control
 Compressor operation frequency is controlled with the following steps in order to make evaporating
temperature constant when cooling and make condensing temperature constant when heating.
 The target temperature of evaporation (Tes) in cooling varies within the range of 2°C  Tes  20°C in
accordance with Trs and indoor air conditioning load.
 The target temperature of condensation (Tcs) in heating also varies within the range of 42°C  Tcs  54°C.
 The compressor is equipped with capacity control function and switches between unload and full load
according to operating conditions.
Step No.
RZQ20/24LVA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
35
Compressor operation frequency
RZQ36/45LVA
RZQ45/48MYL
48.0 Hz 32 Hz
52.5 Hz 36 Hz
57.0 Hz 41 Hz
63.0 Hz 44 Hz
69.0 Hz 48 Hz
78.0 Hz 52 Hz
87.0 Hz 57 Hz
97.5 Hz 62 Hz
109.5 Hz 67 Hz
124.5 Hz 72 Hz
139.5 Hz 78 Hz
156.0 Hz 84 Hz
168.0 Hz 90 Hz
183.0 Hz 94 Hz
192.0 Hz 98 Hz
204.0 Hz 102 Hz
216.0 Hz 107 Hz
228.0 Hz 112 Hz
237.0 Hz 117 Hz
246.0 Hz 123 Hz
255.0 Hz 131 Hz
265.5 Hz 139 Hz
282.0 Hz 147 Hz
297.0 Hz 155 Hz
309.0 Hz 164 Hz
327.0 Hz 174 Hz
333.0 Hz 184 Hz
339.0 Hz 194 Hz
345.0 Hz 205 Hz
354.0 Hz 216 Hz
SiME281501E
Function and Control