Mitsubishi Electric PUZ-WZ50VAA Service Manual page 78

OPERATING PROCEDURE
6. Removing the thermistors
(1) Remove the service panel and cover panel. (See Photo 1-1)
(2) Remove the side panel (R). (See Photo 5-1, 5-2)
(3) Remove the lid of the soundproof cover.*1 (See Photo 6-1)
(4) Remove the thermistors.*2 (See Photo 6-2, 6-3, 6-4)
• Thermistor <Liquid> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Ambient/ 2-Phase pipe> (TH7/6)
• Thermistor <Comp. Surface> (TH33)
• Thermistor <Plate Hex Liquid> (TH34)
(5) Remove the cable traps. (See Photo 6-4)
(6) Remove the relay connector .(See Photo 2-2)
Note 1: When replacing the soundproof lid, fit the lid to the
wrapped cover without making a gap.
Note 2: All thermistors must be replaced at the same time as
they are combined by the relay connector.
7. Removing the 4-way valve coil with wiring of H.P. Switch,
LEV coil (LEV-A, LEV-B), Thermal protector
(1) Remove the service panel. (See Photo 1-1)
[Removing the 4-way valve coil with wiring of H.P. Switch]
(2) Remove the 4-way valve coil fixing screw (1 for front/ M5) to
remove the 4-way valve coil. (See Photo 7-1)
(3) Slide the 4-way valve coil forward to remove it.
(4) Disconnect the wiring of H.P.SWITCH (63H). (See Photo 7-1)
(5) Remove the two relay connectors. (for thermal protector, for
the set of 4 way valve coil and high pressure switches) (See
Photo 2-2, 7-1)
[Removing the LEV coil]
(2) Remove the band of LEV coil. (See Photo 7-2)
(3) Remove the relay connector of LEV coil. (See Photo 2-2)
[Removing the thermal protector]
(2) Remove the relay connector of thermal protector. (See Photo
7-1)
(3) Loosen the two clamps for the lead wire of the thermal pro-
tector. (See Photo 2-3)
(4) Remove the lid of the soundproof cover. *1 (See Photo 6-1)
(5) Remove the nut of terminal cover, then open the terminal
cover. (See Photo 7-3)
(6) Remove thermal protector. (See Photo 7-4)
*1 When replacing the soundproof lid, fit the lid to the
wrapped cover without making a gap.
OCH816
PHOTOS/FIGURES
Photo 6-1
Soundproof cover
of INV. COMP.
Lid
Photo 6-3
Thermistor
<Liquid> (TH3)
Photo 6-4
Cable traps for
thermistors
Photo 7-1
Relay connector
(Thermal protector)
4-way valve coil
H.P.SWITCH
fixing screw
(63H)
Band and rubber tube
Photo 7-3
Terminal cover
Nut of the terminal cover
78
Photo 6-2
Thermistor
<Discharge> (TH4)
Thermistor
<Comp. Surface> (TH33)
Thermistor
<Plate Hex Liquid> (TH34)
Thermistor
<Ambient> (TH7)
Thermistor
<2-Phase pipe> (TH6)
Photo 7-2
Band of LEV Band of LEV
coil A coil B
Bands and rubber mounts
Photo 7-4
Thermal protector