Disassembly Procedure; Operating Procedure - Mitsubishi Electric PAC-LMA30BC Service Manual

8

DISASSEMBLY PROCEDURE

: Indicates the visible parts in the photos/figures.

OPERATING PROCEDURE

1. Removing the controller cover and under panel
(1) Remove 3 controller cover fixing screws (4 ᵡ 10) to detach
the controller cover. (See Photo 1)
(2) Remove 4 under panel fixing screws (4 ᵡ 10) to remove
the under panel. (See Photo 1)
2. Removing the thermistor (TH-A to E*)
If the main unit is not equipped with the thermistors, this
step is not necessary. Make sure that SW4-9 is on.
(1) Remove the controller cover. (See Photo 1)
(2) Remove the under panel. (See Photo 1)
(3) Remove 8 insulations, then remove 9 pipe box (under) fix-
ing screws (4 ᵡ 10). (See Photo 2-1)
(4) Pull out the thermistor(s), TH-A to E, from the sensor hold-
ers mounted on the gas pipe. (See Photo 2-2)
(5) Loosen the insulation sheet which bundles the thermistor
connectors.
(6) Loosen the side clamps, then disconnect the connector(s)
on the controller board.
(7) Pull out the lead wire(s) through the hole to the controller
board side.
*TH-D, E for PAC-LMA50BC. (See Photo 2-3)
Notes:
1. Attach the insulation sheet to the thermistor(s) and the
lead wire(s) of LEV coil after replacing thermistor(s).
2. Install the pipe box not to twine the lead wire(s) and the
pipe cover around the pipe box.
Photo 2-3
Sensor holders
Header assy
LEV assy
hole
Insulation sheet
OCH853A
Photo 1
Photo 2-1
Pipe box
(under)
Photo 2-2
LEV assy
Rubber mount
Header assy
Band
29
PHOTO: PAC-LMA/LMC50BC
PHOTOS/FIGURES
Under panel fixing screws
Under panel
Controller cover
fixing screws
Pipe box (under) fixing screws
Insulations
Screw
(15 x 15 x 46)
Sensor holders
hole
Controller cover
fixing screw
Controller cover
Screws
Insulations
(15 x 12 x 45)
Rubber mount
Band
Insulation sheet