Printed Circuit Boards For Rcd Indoor Units - Hitachi RCI-1.0FSN3 Service Manual

5 Control system

5.1.4 Printed circuit boards for RCD indoor units

C A U T I O N
Turn off the power supply before setting the DIP switches. If not, the settings will not be valid.
N O T E
• The symbol "■" indicates the position of the DIP switches. The figures show the setting before transmission
or after selection.
If the ■ mark is not displayed, this indicates that the position of the pin is not affected.
•
The indoor unit PCB operates with five types of DIP switches and two rotary switches. The position is as follows:
LED1
LED3
LED4
PCN201
PCN202
PCN203
188
SMGB0077 rev.0 - 01/2013
LED indicator
Red
Yellow
Red
Connector indication
PCN1
PCN5
PCN6
PCN7
THM1
THM2
THM3
THM4
THM5
CN1
CN2
CN3
CN4
CN7
This LED indicates the transmission status between the indoor unit
and the remote control.
This LED indicates the transmission status between the indoor unit
and the outdoor unit.
PCB power supply
220 V transformer
Electric heater for dew protection
Drain pump motor
Power supply (1-R, 3-S)
Power supply (1-R, 3-S)
Power supply (1-R, 3-S)
DC motor control
Air inlet thermistor
Air outlet thermistor
Liquid pipe thermistor
Remote thermistor
Gas pipe thermistor
Transformer (pins 1-2: 17.3 V/pins 3-4: 20.8 V)
Outdoor unit H-LINK II control circuit
Optional input functions
Optional output functions
Not used