Hitachi UTOPIA RAS-4HVRP2E - Removing 4-Way Valve; Removing Solenoid Valve Coil (SVA)

9 Servicing
RAS-(4-6)H(V)(R/N)(C/P)2E
SMGB0136 rev.0 - 07/2021
196
11 Assembly the rear cover according to the item “9.3.4Removingbottomservicecoverandrearcover”.
12 Assembly the service cover according to the item “9.3.1Removingservicecover”.
9.3.11 Removing solenoid valve coil (SVA)
1 Disassembly the service cover according to the item “9.3.1Removingservicecover”.
2 Disconnect the PCN7 connector on the control PCB1 of the electrical box.
3 Cut the necessary plastic ties to remove the solenoid valve coil wire.
4 Remove 1 xing screw -2- to the valve -3- and disassembly the solenoid valve coil -1-.
5 Remove the solenoid valve coil -1- with his wire and install the new one.
6 Mount the xing screw -2-.
2
1
3
7 Connect the PCN7 (SVA) connector on the control PCB1 of the electrical box.
8 Fix the valve coil wire with plastic ties as it was originally.
9 Assembly the service cover according to the item “9.3.1Removingservicecover”.
9.3.12 Removing 4-way valve
1 Disassembly the service cover according to the item “9.3.1Removingservicecover”.
2 Disassembly the rear cover according to the item ““9.3.4Removingbottomservicecoverandrearcover”.
3 Collect the refrigerant according to the item ““3.4Refrigerantcharge”.
4 Disassembly the reversing valve coil -3- according to the item “9.3.9Removing4-wayvalvecoil”.
5 Disassembly the electrical box according to the item “9.3.6Removingelectricalbox”.
6 Move all cables and remove the necessary components to leave the working area free.
7 Protect all the elements located around the reversing valve and the brazing area with a wet cloth.
8 Charge the stop valve for liquid with nitrogen and rell the reverse valve piping.
9 Heat the brazed connection -2- and -4- between the reversing valve -1- and the piping with a brazing unit until the
brazing is undone.