Daikin BRC7E61W Service Manual download pdf (Page 53)

Basic Control SiENBE34-703

42 Function

2.2 Compressor PI Control

Compressor PI Control

Carries out the compressor capacity PI control to maintain Te at constant during cooling

operation and Tc at constant during heating operation to ensure stable unit performance.

[Cooling operation]

[Heating operation]

RX(Y)MQ4 · 5 · 6P

Controls compressor capacity to adjust Te to

achieve target value (TeS).

Te : Low pressure equivalent saturation temperature

(°C)

Te setting (Set in Set-up mode 2) TeS : Target Te value

(Varies depending on Te setting, operating

frequency, etc.)

L M (Normal)

(factory

setting)

369

Controls compressor capacity to adjust Tc to

achieve target value (TcS).

Tc : High pressure equivalent saturation temperature

(°C)

Tc setting TcS : Target Tc value

(Varies depending on Tc setting, operating

frequency, etc.)

L M (Normal)

(factory

setting)

43 46 49

STn

INV(Fullload)

INV(Unload) STn

INV(Fullload)

INV(Unload) STn

INV(Fullload)

INV(Unload)

1 36.0Hz 11 80.0Hz 21 140.0Hz

2 39.0Hz 12 86.0Hz 22 146.0Hz

3 43.0Hz 13 92.0Hz 23 152.0Hz

4 47.0Hz 14 98.0Hz 24 158.0Hz

5 52.0Hz 15 104.0Hz 25 164.0Hz

6 52.0Hz 57.0Hz 16 110.0Hz 26 170.0Hz

7 57.0Hz 64.0Hz 17 116.0Hz 27 175.0Hz

8 62.0Hz 71.0Hz 18 122.0Hz 28 180.0Hz

9 68.0Hz 78.0Hz 19 128.0Hz 29 185.0Hz

10 74.0Hz 20 134.0Hz 30 190.0Hz

31 195.0Hz

∗ 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.

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Daikin BRC7E61W Service Manual Page 53

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