Rsw, Dsws And Leds Functions Ras-(4-6)Hv(R/N)(C/P)2E; Location Of Print Circuit Boards (Pcbs); Purpose - Hitachi UTOPIA RAS-4HVRP2E Service Manual

10 Troubleshooting
Checking procedure for main parts

10.4.2 RSW, DSWs and LEDs functions RAS-(4-6)HV(R/N)(C/P)2E

10.4.2.1 Location of print circuit boards (PCBs)

3
2
1

10.4.2.2 Purpose

Symbol PCB
Control and
PCB1
Inverter PCB
PCB2 DSW-PCB
PCB3 Fan PCB
DCL Reactor
316 SMGB0136 rev.0 - 07/2021
1
PCB3
TB PCB2
1. Transmission between the indoor and outdoor units.
2. Processing for sensor input.
3. Processing for dip switch input.
4. Operation control for parts 1 to 3. Compressor operating control, control of the bypass
valve, fan control and overcurrent control.
5. Processing of the safety device input.
6. Processing of the relay output.
7. Detection of reverse phase for power source.
1. 7-segment display indication.
2. Transmission dip switch input to PCB1.
Drive Fan1 Motor.
Used for the Power Factor Correction.
2
DCL
Purpose
3
PCB1