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SiENBE04-808_A
Control Specification
Function and Control
46
3.2
Frequency Control
Outline
Frequency is determined according to the difference between the room thermistor temperature
and the target temperature.
The function is explained as follows.
1. How to determine frequency
2. Frequency command from the indoor unit (Difference between the room thermistor
temperature and the target temperature)
3. Frequency initial setting
4. PI control
Detail
How to Determine Frequency
The compressor’s frequency is determined by taking the following steps.
For Cooling Only Model
1. Determine command frequency
Command frequency is determined in the following order of priority.
1. Forced cooling
2. Indoor frequency command
2. Determine upper limit frequency
The minimum value is set as an upper limit frequency among the frequency upper limits of
the following functions:
Compressor protection, input current, discharge pipe temperature, freeze-up protection.
3. Determine lower limit frequency
The maximum value is set as an lower limit frequency among the frequency lower limits of
the following function:
Pressure difference upkeep.
4. Determine prohibited frequency
There is a certain prohibited frequency such as a power supply frequency.
For Heat Pump Model
1. Determine command frequency
Command frequency is determined in the following order of priority.
1. Limiting defrost control time
2. Forced cooling
3. Indoor frequency command
Command frequency
Limit frequency
Skip control
Upper limit frequency
FMAX
Lower limit frequency
FMIN
Target frequency
(R11592)
When the shift of the frequency is less than zero (
Δ
F<0) by PI control,
the target frequency is used as the command frequency.
(
∗
): only for heat pump model
Initial frequency
PI control Defrost
control (
∗
)
Drooping function
Input current control, etc.
Upper limit function
Compressor protection function
Lower limit function
Four way valve operating compensation (
∗
), etc.
SiENBE04-808_A.pdf 58
21/02/2011 13:19:56
Содержание ARXS20G2V1B
Страница 13: ...SiENBE04 808_A 1 List of Functions Part 1 List of Functions 1 Functions 2 1 1 Cooling Only 2 1 2 Heat Pump 3 ...
Страница 17: ...SiENBE04 808_A 5 Specifications Part 2 Specifications 1 Specifications 6 1 1 Cooling Only 6 1 2 Heat Pump 9 ...
Страница 297: ...Outdoor Unit RK X S50G2V1B ARXS50G2V1B SiENBE04 808_A 285 Removal Procedure ...