Hitachi RAS-(4-12)HRNM(2)(E) - Removing the High Pressure Switch and Pressure Switch for Control

10 Servicing
415
SMGB0064 rev.0 - 08/2011
10
8 Remove the suction pipe and discharge pipe from the compressor.
• Be sure to separate the blazing burner ame sufciently from the wires and electrical components around the
brazed part in order to avoid burning.
9 Remove two (2) nuts which x the compressor and remove the compressor. Lift the compressor and remove from the
unit body.
N O T E
• To remove the compressor the liquid stop valve pipe should be moved (bent) to the right side hand. PAY
CLOSE ATTENTION not to crush to break the pipe.
10 When brazing the replaced compressor braze quickly cooling the pipes on the compressor side with wet cloth to avoid
the ller metal entering into the compressor.
• PAY CLOSE ATTENTION not to let the ller metal enter into the compressor which may result in compressor da-
mage.
a. Check if the Faston terminal has any abnormality. (Ensure the pull out force greater than 20 Nm) If the Faston ter-
minal is identied faulty replace with a new one.
b. Ensure the xture of the lead wires.
1
2
3
4
5
6
7
1. Suction pipe.
2. Discharge pipe.
3. Cover pipes with wet cloth.
4. See compressor position table below.
5. Vibration-Proof rubber 2.
6. Nut and washer.
7. Vibration-Proof rubber 1.
Fixation of the compressor to the bottom plate
Compressor position 1 2 3 4
Vibration-proof rubber 1 x x x x
Vibration-proof rubber 2 x x — —
Nut x x — —

Removing the high pressure switch and pressure switch for control
1 Remove the service cover bottom service cover and rear cover following Removing service cover, see on page 408 and
Removing bottom service cover and rear cover, see on page 410.
2 Collect the refrigerant from the check joint according to Removing the compressor, see on page 413 in this chapter.
3 Remove the soundproof cover on the compressor.
4 Disconnect the Faston Terminals.
Remove the high pressure switch and the pressure switch for control from the brazed part of discharge piping.