Daikin DCS601B51 Operation Manual page 32

System Setup
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Settings
31
The control instruction is sent to the indoor units registered in the automatic
cooling/heating switch group when the control implementation conditions shown on
the previous page are satisfied. The actual control instructions sent differ according to
the control method setting (fixed air conditioner/operating air conditioner
selection/average) and the satisfied conditions (switch from cooling to heating, etc.).
The control instructions for each situation are shown below.
<Instructions sent to indoor units when control is implemented>
1.Fixed air conditioner/operating air conditioner selection methods
The control instructions are determined by the operation mode of the main indoor
unit and the main set temperature. Instructions regarding the operation mode and
the set temperature, shown below, are sent to all the indoor units registered in the
group once all the control implementation conditions on the previous page are
satisfied.
When conditions are met for
switching from heating to cooling
Operation mode
Heating/Automatic heating
of the main
Cooling/Automatic cooling
indoor unit
When conditions are met for
switching from cooling to heating
Operation mode
Cooling/Automatic cooling
of the main
Heating/Automatic heating
indoor unit
For this control, when the operation mode of the main indoor unit is automatic,
whether it is automatic cooling mode or automatic heating mode is checked when
judging the control conditions. Once the instructions have been determined, either a
cooling or a heating instruction is sent to indoor units in automatic operation mode.
(They switch from automatic to cooling or heating.)
2. Average Method
Unlike the fixed air conditioner and operating air conditioner selection methods, the
set temperature is decided based on considerations of the current set temperature
for each individual unit, without sending the same instruction based on the main
indoor unit to all the air conditioners. When implementing the control, the following
operation modes and set temperature instructions are executed.
When conditions are met for
switching from heating to cooling
Current indoor
Heating/Automatic heating
unit operation
Cooling/Automatic cooling No instruction
mode
Other than the above
When conditions are met for
switching from cooling to heating
Current indoor Cooling/Automatic cooling
unit operation
Heating/Automatic heating No instruction
mode
Other than the above
Description
Instructions to indoor units registered in the
automatic cooling/heating switch group
Set temperature
Operation mode
cooling main unit setting temperature+temperature difference
cooling main unit setting temperature
Instructions to indoor units registered in the
automatic cooling/heating switch group
Operation mode
Set temperature
heating
main unit setting temperature–temperature difference
heating main unit setting temperature
Instructions to indoor units registered in the
automatic cooling/heating switch group
Set temperature
Operation mode
Current set temperature+temperature difference
cooling
No instruction
main unit setting temperature+
cooling
Instructions to indoor units registered in the
automatic cooling/heating switch group
Operation mode Set temperature
Current set temperature-temperature difference
heating
No instruction
cooling
main unit setting temperature–
Operation
(Reference)
temperature difference
temperature difference