Compressor Pi Control - Daikin ALTHERMA HT Service Manual

Basic Control

2.2 Compressor PI Control

Compressor PI Control

Carries out the compressor capacity PI control to maintain Tc at constant during heating
operation to ensure stable unit performance.
Outdoor compressor (R-410A)
STn INV(Fullload) INV(Unload)
1
2
3
4
5
6 52.0Hz
7 57.0Hz
8 62.0Hz
9 68.0Hz
10 74.0Hz
 Compressors may operate in a pattern other than those listed in above tables subject to the operating conditions.
Selection of full load operation to/from unload operation is made with the unload circuit solenoid valve
(Y3S=SVUL). The full load operation is performed with the SVUL set to OFF, while the unload operation is
performed with the SVUL set to ON.
Indoor compressor (R-134a)
STEP INV
1 40.0Hz
2 46.0Hz
3 52.0Hz
4 57.0Hz
5 62.0Hz
6 68.0Hz
7 74.0Hz
8 80.0Hz
9 86.0Hz
10 92.0Hz
11kW -> max. 21 steps
14kW -> max. 26 steps
16kW -> max. 30 steps
48
STn INV(Fullload) INV(Unload)
36.0Hz 11
39.0Hz 12
43.0Hz 13
47.0Hz 14
52.0Hz 15
57.0Hz 16
64.0Hz 17
71.0Hz 18
78.0Hz 19
20
STEP INV
11 98.0Hz
12 104.0Hz
13 110.0Hz
14 116.0Hz
15 122.0Hz
16 128.0Hz
17 134.0Hz
18 138.0Hz
19 144.0Hz
20 152.0Hz
80.0Hz
86.0Hz
92.0Hz
98.0Hz
104.0Hz
110.0Hz
116.0Hz
122.0Hz
128.0Hz
134.0Hz
STEP INV
21 158.0Hz
22 164.0Hz
23 170.0Hz
24 174.0Hz
25 182.0Hz
26 188.0Hz
27 194.0Hz
28 200.0Hz
29 206.0Hz
30 210.0Hz
ESIE09-08B
STn INV(Fullload) INV(Unload)
21 140.0Hz
22 146.0Hz
23 152.0Hz
24 158.0Hz
25 164.0Hz
26 170.0Hz
27 175.0Hz
28 180.0Hz
29 185.0Hz
30 190.0Hz
Function