Control Specification (09/12 Class); Mode Hierarchy; Frequency Control - Daikin FTXS09HVJU Service Manual

Control Specification (09/12 Class)

3. Control Specification (09/12 Class)

3.1

Mode Hierarchy

There are two modes; the mode selected by the user (normal air conditioning mode) and forced
Outline
operation mode for installing and servicing.
Detail Modes available are stop, cooling (includes drying), and heating (includes defrosting)
Unless specified otherwise, an indoor dry operation command must be regarded as cooling
Note:
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
3. Frequency command from an indoor unit.
4. Frequency initial setting.
5. PI control.
36
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)
temperature set by the remote controller.
Frequency changes by PI control < repeats when frequency becomes lower
Command frequency X repeats when frequency becomes lower
Command frequency
Initial frequency
PI control
Defrost control (*)
Preheat operation
During C (capacitor) is discharging
Stop
Dropping function
Input current control, etc.
Upper limit frequency
Limit frequency Skip control
Lower limit frequency Lower limit function
Four-way valve operating compensation, etc. (*)
FMIN
*; only for heat pump model
(R2829)
Upper limit function
Compressor protection function
Target frequency
(R2831)
Function and Control
SiUS04-904