High Wall, Heat Pump Type
Service Manual
32
Toshiba
8-1-3. Contents of Operation
Command Signal (Serial
Signal)
From indoor unit controller to outdoor unit
controller
The following three types of signals are sent from the
indoor unit controller.
• Operation mode set on the remote controller
• Compressor revolution command signal defined by
indoor temperature and set temperature (Correction
along with variation of room temperature and
correction of indoor heat exchanger temperature are
added.)
• Temperature of indoor heat exchanger
• For these signals ([Operation mode] and
[Compressor revolution] indoor heat exchanger
temperature), the outdoor unit controller monitors
the input current to the inverter, and performs the
followed operation within the range that current does
not exceed the allowable value.
From outdoor unit controller to indoor unit
controller
The following signals are sent from the outdoor unit
controller.
• The current operation mode
• The current compressor revolution
• Outdoor temperature
• Existence of protective circuit operation
For transferring of these signals, the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.
Contents of judgment are described below.
• Whether distinction of the current operation status
meets to the operation command signal
• Whether protective circuit operates
When no signal is received from the outdoor unit
controller, it is assumed as a trouble.
8-2. Basic Operation
8-2-1. Operation Control
Receiving the user’s operation condition setup, the
operation statuses of indoor/outdoor units are
controlled.
1) The operation conditions are selected by the
remote controller as shown in the below.
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 below.
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 below, and also controls the
compressor, outdoor fan motor, 4-way valve
and pulse motor valve.
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 32 Wednesday, March 4, 2009 11:22 AM
