Daikin RXG20L2V1B - Control Specification; Mode Hierarchy; Frequency Control

Control Specification SiBE041401E
37 Function and Control
3. Control Specification
3.1 Mode Hierarchy
Outline The air conditioner control has normal operation mode, forced operation mode, and power
transistor test mode for installation and servicing.
Detail
Note: Unless specified otherwise, a dry operation command is regarded as cooling operation.
3.2 Frequency Control
Outline The compressor frequency is determined according to the difference between the room
thermistor temperature and the target temperature.
Detail 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
Air conditioner control mode
Forced operation mode
Forced cooling operation (for pump down operation)
Power transistor test mode
Normal operation mode
Fan
Cooling (includes drying)
Heating
Heating
Defrosting
Stop (indoor unit: OFF)
Preheating operation
Discharging from capacitor
Stop
(R19522)
Command frequency Limit frequency
Skip control
Lower limit function
Four way valve operation compensation, etc.
Initial frequency
PI control
Defrost control
Dropping function
Input current control, etc.
Upper limit function
Compressor protection function
Upper limit frequency
FMAX
Lower limit frequency
FMIN
Target frequency
(R18023)
When the shift of the frequency is less than zero (∆F<0) by PI control,
the target frequency is used as the command frequency.