Hitachi UTOPIA RAS-4HVRP2E Service Manual page 196

9 Servicing
RAS-(4-6)H(V)(R/N)(C/P)2E
i. Braze the connection -4- to the Discharge Pipe -2- until the sensor is properly installed.
j. Allow the brazing to cool down for a few minutes.
k. Remove all used protections and wet cloths.
l. Move the cables until they are the same as they were originally.
m. Install the wire of the new sensor as it was originally and connect the PCB1 according to the item
Removing electrical box".
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Pressure switch for control on Suction Pipe
a. Disconnect the Faston terminals -1-.
b. Move all cables and remove the necessary components to leave the working area free.
c. Protect the 4-way valve -5- with a wet cloth.
d. Protect the check valve with a wet cloth.
e. Heat the brazing joint -3- between the Pressure Switch for control -2- and the Suction Pipe -4- until the switch is
released.
f. Remove the Pressure Switch for control -2- and install the new one.
g. Protect the new Pressure Switch for control -2- with a wet cloth.
h. Braze the connection -3- to the Suction Pipe -4- until the switch is properly installed.
i. Allow the brazing to cool down for a few minutes.
j. Remove all used protections and wet cloths.
k. Move the cables until they are the same as they were originally.
l. Connect the Faston terminals to the switch.
4 Charge new refrigerant according to the item "3.4 Refrigerant charge".
5 Assembly the bottom service cover and rear cover according to the item
rear cover".
6 Assembly the service cover according to the item "9.3.1 Removing service cover".
194 SMGB0136 rev.0 - 07/2021
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2
5 4
3
1 2
3 4
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"9.3.4 Removing bottom service cover and
"9.3.6