Mitsubishi Electric PUHZ-P100VHA2 Service Manual page 135

OPERATING PROCEDURE
10. Removing bypass valve coil (SV) and bypass valve
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 right side panel fixing screws (5 × 12) in the
rear of the unit and remove the right side panel.
(4) Remove the bypass valve coil fixing screw (M5 × 6).
(5) Remove the bypass valve by sliding the coil upward.
(6) Disconnect the connector SV2 (blue) on the controller
circuit board in the electrical parts box.
(7) Recover refrigerant.
(8) Remove the welded part of bypass valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
11. Removing the high pressure switch (63H)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 right side panel fixing screws (5 × 12) in the
rear of the unit and remove the right side panel.
(4) Pull out the lead wire of high pressure switch.
(5) Recover refrigerant.
(6) Remove the welded part of high pressure switch.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the high pressure switch, cover it
with a wet cloth to prevent it from heating (100°C
or more), then braze the pipes so that the inside
of pipes are not oxidized.
12. Removing the reactor (DCL) (P125/140V)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
<Removing the reactor>
(4) Remove 4 reactor fixing screws (4 × 10) and remove the
reactor.
* The reactor is attached to the rear of the electrical parts box.
OCH415F
Photo 9
Lead wire of high
pressure switch
High pressure switch
Bypass valve
coil (SV)
Bypass
valve coil
fixing screw
Photo 10 (PUHZ-P125/140VHA2.UK)
Reactor fixing screw
135
PHOTOS
LEV
LEV coil (LEV A)
4-way valve coil
(21S4)
4-way valve coil
fixing screw
Electrical parts box
Reactor fixing screws
4-way valve
Reactor
(DCL)