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Remote controller
Indoor unit
Control contents of remote controller
• ON/OFF (Air conditioner/Air purifier)
• Operation select
(COOL/HEAT/AUTO/DRY)
• Temperature setup
• Air direction
• Swing
• Air volume select
(AUTO/LOW/LOW+/MED/MED+/HIGH)
• ECO
• ON timer setup
• OFF timer setup
• High power
Signal
receiving
Indoor unit
control
Indoor unit control
• Command signal generating
function of indoor unit operation
• Calculation function
(temperature calculation)
• Activation compensation
function of indoor fan
• Cold draft preventive function
• Timer function
• Indoor heat exchanger
release control
• Clean function
Operation
command
Serial signal
send/receive
• Indoor fan motor
• Louver motor
Outdoor unit
Outdoor unit control
• Frequency control of inverter output
• Waveform composite function
• Calculation function
(Temperature calculation)
• AD conversion function
• Quick heating function
• Delay function of compressor reactivation
• Current release function
• GTr over-current preventive function
• Defrost operation function
• Compressor
• Outdoor fan motor
• 4-way valve
• Pulse motor valve (PMV)
Selection
of operation
conditions
ON/OFF
Serial signal
send/receive
Outdoor unit
control
Operation ON
Setup of remote controller
Indoor fan motor control
Louver control
Compressor revolution control
Outdoor fan motor control
4-way valve control
In cooling operation: ON
In heating operation: OFF
Pulse motor valve control
Indoor unit
control
Sending of
operation
command signal
Outdoor unit
control
Inverter
~
[ ]
Item
1. Basic
operation
Operation flow and applicable data, etc.
1) Operation control
Receiving the user’s operation condition setup, the opera-
tion statuses of indoor/outdoor units are controlled.
Description
1) The operation conditions are
selected by the remote controller as
shown in the left.
2) A signal is sent by ON button of the
remote controller.
3) The signal is received by a sensor of
the indoor unit and processed by
the indoor controllers as shown in
the left.
4) The indoor controller controls the
indoor fan motor and louver motor.
5) The indoor controller sends the
operation command to the outdoor
controller, and sends/receives the
control status with a serial signal.
6) The outdoor controller controls the
operation as shown in the left, and
also controls the compressor,
outdoor fan motor, 4-way valve and
pulse motor valve.
2) Cooling/Heating operation
The operations are performed in the following parts by
controls according to cooling/heating conditions.
1) Receiving the operation ON signal of
the remote controller, the cooling or
heating operation signal starts being
transferred form the indoor control-
ler to the outdoor unit.
2) At the indoor unit side, the indoor
fan is operated according to the
contents of “2. Indoor fan motor
control” and the louver according to
the contents of “9. Louver control”,
respectively.
3) The outdoor unit controls the
outdoor fan motor, compressor,
pulse motor valve and 4-way valve
according to the operation signal
sent from the indoor unit.
*1. The power coupler of
4-way valve is usually turned on,
and it is turned off during defrost
operation. (Only in heating)
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