Hitachi RAS-4-HNCE - Opening Electrical Box (P-Mounting Plate); Removing High Pressure Switch and Pressure Switch for Control

10. Servicing
367
SMGB0079 rev.0 - 01/2013
10
10.3.3.8 Removing High pressure switch and pressure switch for control
1 Remove the service cover following Removing service cover in this chapter.
2 Collect the refrigerant from the check joint according to Removing the compressor, in this chapter.
High pressure switch and pressure switch for control
1 Disconnect the Faston Terminals of High Pressure Switch and Pressure sensor for PD control.
2 Remove the high pressure switch and the pressure switch for control from the brazed part of discharge piping.
N O T E
Theprocedure(1)isnotrequiredwhenremovingthepressuresensorforPDcontrol.However,checktoensure
thattheconnector(CN100)onO.U.PCB1isdisconnected.
Low pressure switch
1 Disconnect the Faston Terminals of Low Pressure Switch.
2 Remove the low pressure switch from the brazed part of suction piping.
Discharge pipe
Brazing part
Brazing part
High pressure
switch
Pressure sen-
sor for
control
Brazing part
Low pressure switch
P view
Suction pipe
10.3.3.9 Opening electrical box (P-Mounting Plate)
1 Remove the service cover following Removing service cover in this chapter.
2 Remove 6 screws which x the electrical box and open the P plate turning counter clockwise approximately 90°.
• Check that the LED201 (red) on the inverter PCB (PCB2) is OFF when opening P-mounting plate.
2 xing
screws
Power plate
Upper cover
2 xing
screws
2 xing
screws
D A N G E R
DONOTtouchelectricalcomponentswhiletheLED201(Red)orLED1(Red)areONtoavoidelectricalshock.Wait
untiltheLEDsturnoff.