Removing Solenoid Valve Coil (Sva); Removing 4-Way Valve - Hitachi UTOPIA RAS-4HVRP2E Service Manual

9 Servicing
RAS-(4-6)H(V)(R/N)(C/P)2E
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 fixing 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 fixing 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 refill 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.
196 SMGB0136 rev.0 - 07/2021