Daikin FTXS09HVJU, Service Manual

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Control Specification (09/12 Class) SiUS04-904
36 Function and Control
3. Control Specification (09/12 Class)
3.1 Mode Hierarchy
Outline There are two modes; the mode selected by the user (normal air conditioning mode) and forced
operation mode for installing and servicing.
Detail Modes available are stop , cooling (includes drying), and heating (includes defrosting)
Note:
Unless specified otherwise, an indoor dry operation command must be regarded as cooling
operation.
3.2 Frequency Control
Outline Frequency is determined according to the difference between room and set temperature.
The function is explained as follows.
1. How to determine frequency.
2. Frequency command from an indoor unit. The difference between a room temperature and the
temperature set by the remote controller.
3. Frequency command from an indoor unit.
4. Frequency initial setting.
5. PI control.
Air conditioner control mode
Forced operating mode
Forced cooling (for Pump Down Operation)
Normal operating mode
Cooling
Heating
Defrosting
Stop mode (except for cooling/heating modes by indoor command)
Preheat operation
During C (capacitor) is discharging
Stop
(R2829)
Command fre qu ency Limit fre q uency Skip control
Upper limit f u nction
Compressor protection f u nction
Lo w er limit f u nction
Fo u r- w ay v al v e operating compensation, etc. (*)
Initial fre qu ency
PI control
Defrost control (*)
Dropping f u nction
Inp u t c u rrent control, etc.
Upper limit fre q uency
Lower limit fre q uency
FMIN
Tar g et fre q uency
Command fre qu ency X repeats w hen fre qu ency b ecomes lo w er
Fre qu ency changes b y PI control < repeats w hen fre qu ency b ecomes lo w er
*; only for heat p u mp model
(R2 8 31)