Indoor Unit Pcb; Printed Circuit Board Layout (Except Rpk) - Hitachi FSG1 Series Technical Catalogue

CONTROL SYSTEM
9
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9.2.

INDOOR UNIT PCB

9.2.1.

PRINTED CIRCUIT BOARD LAYOUT (EXCEPT RPK)

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PCB drawing
The PCB in the Indoor Unit is operating with 4 types of
DIP Switches, 1 sliding Switch and 1 Rotary Switch. The
location is as follows:
CONNECTOR INDICATION
PCN1 Transformer (220V)
PCN2 Internal Thermostat Indoor Fan Motor
PCN3 Electric Heater
Electric Heater for dew protection
PCN5
((SR Heater) RPC & Panel)
PCN6 Drain Pump Motor (RCI/RPI)
PCN7 Power Source (1-R, 2-S, 3-N, 4-E)
PCN8 Capacitor
PCN10 Fan Motor Power
PCN11 Fan Motor Speeds control
THM1 Inlet Air
THM2 Outlet Air
THM3 Liquid Pipe
THM4 Remote Thermistor (THM-R2 AE)
THM5 Gas Pipe
LED's INDICATION
LED1 Green
LED2 Yellow
LED3 Red
CONNECTOR INDICATION
CN1 Transformer (pin 1-2: 17.3V / pin 3-4: 20.8V)
CN2 Control Circuit for OUTDOOR UNIT H-Link
CN3 Input optional functions (only 2)
CN7 Output optional functions (only 2)
CN8 Output optional functions (#1 #2, only 1)
CN11 Expansion Valve Control
CN12 Remote control Bridge connector for multiple units
CN13 Remote control SW
CN14 Float Switch (RCI/RPI)
CN17 Swing Louver Motor
DSW3 Capacity Code
DSW5 REF. Cycle Nº
DSW6 Model Code
DSW7 Fuse Recover and Remote Control Selector
RSW Setting of indoor unit number
SSW Selector SW (PC-2H2/PC-P1HE)
Power Source for PCB
This LED indicates the
transmission state between
Indoor Unit and RCS
This LED indicates the
transmission state between
the indoor unit and outdoor
unit