– 57 –
5. Heat exchanger temperature thermistor circuit
● The circuit detects the indoor heat
exchanger temperature and controls
the following.
(1) Low-temperature defrosting during
cooling and dehumidifying
operation.
The voltage at A depends on the heat
exchanger temperature as shown in
Fig. 5-2.
6. Temporary Switch
● The temporary switch is used to operate the air conditioner temporarily when the wireless remote control
is lost or faulty.
● The air conditioner operates in the previous mode at the previously set temperature. However, when the
power switch is set to OFF, it starts automatic operation.
INDICATION P.W.B.
Option
5V
Temporary
Switch 1
Temporary Switch 2
C1
1
2
3
4
7
CN9
CN11A
5V
0V 0V
48
HA input
HA output
Micro computer
C2
M1
M2
R601
R602
C601
R701
33
Fig. 6-1
0V
Heat exchanger
temperature thermistor
0V
5V
Fig. 5-1
A
R307
C301
Micro computer
Heat
exchanger
temperature
input
R308
5
4
3
2
1
0
010
-10
Fig. 5-2
20 30 40
Voltage at
(V)A
61
To Next Page
Loading...
