High Wall, Heat Pump Type
Service Manual
33
Toshiba
8-2-2. 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 from
the indoor controller to the outdoor unit.
2) At the indoor unit side, the indoor fan is
operated according to the contents of “8-3.
Indoor fan motor control” and the louver
according to the contents of “8-9. 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.
8-2-3. AUTO Operation
Selection of operation mode
As shown in the following figure, the operation starts by
selecting automatically the status of room temperature
(TA) when starting AUTO operation.
* 1. When reselecting the operation mode, the fan
speed is controlled by the previous operation
mode.
1) Detects the room temperature (TA) when the
operation started.
2) Selects an operation mode from TA in the
above figure.
3) Fan operation continues until an operation
mode is selected.
~
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)
• Sleep mode
• ON timer setup
• OFF timer setup
• High power
• 8°C heat operation (-ND model only)
Selection of
operation
conditions
Remote controller
Indoor unit
ON/OFF
Signal
receiving
Indoor unit
control
Operation
command
Serial signal
send/receive
Indoor unit control
• Command signal generating function of
indoor unit operation
• Calculating function
(temperature calculation)
• Activation compensation function of
indoor fan
• Cold draft preventive function
• Timer function
• Indoor heat exchanger release control
Outdoor unit
Outdoor unit
control
Serial signal
send/receive
Inverter
Outdoor unit control
• Compressor speed 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
• Pulse motor valve
(P.M.V.)
• Freeze prevention
heater
(-ND model only)
• 4-way valve
(Switch between
Cooling and Heating)
• 4-way valve
(Switch between
2 cylinder operation
and
1 cylinder operation)
• Moving panel motor
• Indoor fan motor
• Louver motor
• Air purifier
Operation ON
Indoor unit control
Sending of operation
command signal
Outdoor unit control
Setup of remote controller
Indoor fan motor control /
Louver control
(After energization of the coil for
1 second,the 4-way valve is switched
to the cooling or heating position.)
Compressor revolution control /
Outdoor fan motor control /
Pulse motor valve control /
4-way valve control
Ts + 1
Ts – 1
TA
Cooling operation
Monitoring (Fan)
Heating operation
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 33 Wednesday, March 4, 2009 11:22 AM
