Hitachi RASC-10HNPE, Руководство по обслуживанию, Страница: 172 / 306

9 Servicing
Removing components
SMGB0091 rev.2 - 11/2015 162
9.3.11 Replacement of the pressure protection devices
1 In order to access to the unit’s internal parts, remove the following covers and panels depending on access
restrictions:
a. If upper cover can be removed, remove it as described in section “9.3.6 Removing upper cover” and access to the
unit’s internal parts from the upper side.
b. If upper cover can be removed, remove the cycle service cover as described in section “9.3.1 Removing cycle
service cover” .
2 Collect the refrigerant as explained in section “3.4.4
Pump down refrigerant” .
High pressure switch (PSH)
Pressure sensor for
discharge pressure
control (Pd)
Low pressure switch (PSL)
3 To remove the pressure protection devices, proceed as follows
High pressure switch (PSH) and Low pressure switch (PSL)
a.
Disconnect the Faston terminals from the high
pressure switch.
b. Using a burner, cut the high pressure switch from
the brazing neck of discharge pipe (for PSH) and
suction pipe (for PSL).
Brazing part
Faston terminals
Pressure sensor for discharge pressure control (Pd)
a. Cut de pressure sensor from the brazing neck of
discharge pipe
b. Disconnect the pressure sensor connector from
CN100 of RASC PCB1, and then, remove the
pressure sensor.
Pressure sensor for discharge
pressure control (PD)
Brazing part
4 When reassembling, perform the procedure in the reverse order of removing.
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N O T E
Fix the wires by plastic bands to the original position.