Toshiba RAV-362BH-PE Service Manual page 14

7.5 Serial signal circuit (between indoor and outdoor
units)
Transmits and receives the signals between indoor and out-
door units in serial signals. As 230V is used for
transmitting the signal, the microcomputer section is
insulated with photo-coupler with 5V being supplied.
Input 5V
0
h
Output 5V
0
g
7.6 Abnormality-detecting circuit
When high pressure switch is operated, abnormality is
detected to stop the compressor.
5V
0
7.7 Relay circuit
The relay circuit consists of the diagram on the
right-hand side.
RY05 : 4-way valve ON/OFF
RY07 : Magnetic switch ON/OFF
(L)
(N)
Serial
Abnormal input
High
Pressure
Switch
4-Way-Valve
- 14 -
AC
Serial
input
Serial
output
abnormal
input
Relay control
circuit