Disassembly Procedure - Mitsubishi Electric PAC-AK50BC Technical & Service Manual

8

DISASSEMBLY PROCEDURE

PAC-AK50BC
PAC-AK30BC
Note:
1. Before disassembling/servicing the branch box, be sure to power off the outdoor unit.
2. Be careful of dropping of the panel or controller board during the service.
3. When servicing the parts associated with refrigerant, recover refrigerant in advance.
4. Be sure to practice non-oxidation welding.
OPERATING PROCEDURE
1. Removing the controller cover and under panel
(1) Remove 3 controller cover fixing screws (4 o 10) to detach
the cover. (See Photo 1.)
(2) Remove 6 under panel fixing screws (4 o 10) to remove
the panel. (See Photo 1.)
2. Removing the drain pan
(1) Remove the under panel. (See Photo 1.)
(2) Remove the drain hose.
(3) Incline the side of the drain pan that faces the piping to
remove the pan.
* When removing the drain pan, be careful with
remaining water on the pan.
Also, be careful not to make cracks on the pan.
3. Removing the thermistors (TH-A–E)
(1) Remove the controller cover. (See Photo 1.)
(2) Remove the under panel. (See Photo 1.)
(3) Pull out the thermistors, TH-A–E, from the sensor holders
mounted on the gas pipe. (See Photo 3.)
(4) Pull out those thermistors through the U-shaped hole to
the board side.
(5) Loosen the side clamps of the board and disconnect the
connectors on the board.
OCH508A
PAC-AK51BC
PAC-AK31BC
PAC-AK52BC
PAC-AK32BC
Photo 1
Controller cover fixing screws
Photo 2
Photo 3
23
PAC-AK53BC
PHOTOS
Under panel fixing screws
Drain pan
Sensor holder
U-shaped hole