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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.
Summary of Contents for FTXG20LV1BW
Page 12: ...SiBE041401E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiBE041401E 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 60: ...SiBE041401E 49 Remote Controller Part 5 Remote Controller 1 Remote controller 50...
Page 113: ...SiBE041401E Check Service Diagnosis 102 50 class Diode bridge R19944...
Page 127: ...Revision History Month Year Version Revised contents 03 2014 SiBE041401E First edition...