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5 Control system
Printed circuit board for RPI-(8.0-20.0)FSN3(P)E(-f) units
SMGB0099 rev.0 - 12/2016
192
5.7 Printed circuit board for RPI-(8.0-20.0)FSN3(P)E(-f) units
The indoor unit PCB operates with four types of DIP switches, a slide switch and a rotary switch. The position is as
follows:
LED indicator
LED1
Red
This LED indicates the transmission status between the indoor unit and the remote control.
LED3
Yellow
This LED indicates the transmission status between the indoor unit and the outdoor unit.
LED4
Green
PCB power supply
Connector indication
PCN1
220 V transformer
PCN2
Indoor fan motor internal thermostat
PCN3
Fan stoppage alarm signal
PCN6
Drain pump motor (RPI)
PCN7
Power supply (1-R, 2-S, 3-N, 4-E)
THM1
Air inlet thermistor
THM2
Air outlet thermistor
THM3
Liquid pipe thermistor
THM4
Remote thermistor (THM-R2 AE)
THM5
Gas pipe thermistor
EFR1
Fuse
EF4
Fuse
CN1
Transformer (pins 1-2: 17.3 V/pins 3-4: 20.8 V)
CN2
Outdoor unit H-LINK control circuit
CN3
Optional input functions (only 2)
CN7
Optional output functions (only 2)
CN8
Optional output functions (number 1, number 2, only 1)
CN11
Expansion valve control
CN14
Float switch (RPI)
CN17
Swing louver motor
Switch indication
DSW3
Capacity code
DSW4
Unit model code
DSW5, RSW2
Refrigerant cycle number
DSW7
Fuse recovery and remote control selector
DWS6, RSW1
Indoor unit number settings