Hitachi EV-1.5N1, Service Manual

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10. Servicing
382
SMGB0079 rev.0 - 01/2013
10.3.4.8 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
Electrical Box
Upper cover
High pressure switch
Pressure sensor for PD control
Brazing part
Rear cover
Brazing part
Suction pipe
Brazing part
Low pressure switch
Brazing part
Low pressure switch
Pressure sensor
for control High pressure switch
  
Opening electrical box (P-Mounting Plate)
1 Remove the service cover following Removing service cover in this chapter.
2
Remove 5 screws which fix 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 fixing
screws
Power plate
Upper cover
2 fixing
screws
1 fixing
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.