Control Specification SiBE121021_C
112 Function and Control
4. Control Specification
4.1 Mode Hierarchy
Outline There are two modes; the one is the normal operation mode and the other is the forced
operation mode for installation and providing service.
Detail Cooling only model
There are following modes.
Heat Pump Model
There are following modes.
Note: Unless specified otherwise, dry operation command is regarded as cooling operation. An indoor
fan operation cannot be made in a multiple indoor unit. (A forced fan command to the indoor unit
from the outdoor unit is made during forced operation.)
Determine Operation Mode
The system judges the operation mode command which is set by each room in accordance with
the procedure, and determines the operation mode of the system.
The following procedure is taken when the modes conflict with each other.
*1. The system follows the mode which is set first. (First-push, first-set)
*2. For the rooms where the different mode is set, standby mode is activated. (The operation
lamp blinks.)
Air conditioner control mode
Forced operation mode
Forced cooling operation
Power transistor test mode
Normal operation mode
Fan
Cooling (includes drying)
Stop (indoor unit: OFF)
Preheating operation
Discharging from capacitor
Stop
(R14428)
Air conditioner control mode
Forced operation mode
Forced cooling 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
(R14248)
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