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8
DISASSEMBLY PROCEDURE
BRANCH BOX: PAC-MK53BC
PAC-MK53BCB
OPERATING PROCEDURE
1. Removing the controller cover and under panel
(1) R emove 3 controller cover fixing screws (4 o 10) to
detach the controller cover. (See Photo 1)
(2) R emove 4 under panel fixing screws (4 o 10) to remove
the under panel. (See Photo 1)
2. Removing the thermistor (TH-A–E*)
(1) R emove the controller cover. (See Photo 1)
(2) R emove the under panel. (See Photo 1)
(3) R emove 8 insulations, then remove 9 pipe box (under)
fixing screws (4 o 10). (See Photo 2-1)
(4) P ull out the thermistor(s), TH-A–E, from the sensor hold-
ers mounted on the gas pipe. (See Photo 2-2)
(5) L oosen the insulation sheet which bundles the thermistor
connectors.
(6) L oosen the side clamps, then disconnect the connector(s)
on the controller board.
(7) P ull out the lead wire(s) through the hole to the controller
board side.
*TH-A–C for PAC-MK33BC(B). (See Photo 2-3)
Photo 2-2
Sensor holders
LEV assy
Header assy
Insulation sheet
hole
OCH664
PAC-MK33BC
PAC-MK33BCB
Rubber mount
Band
PHOTOS/FIGURES
Photo 1
Under panel fixing screws
Under panel
Controller cover
fixing screws
Photo 2-1
Pipe box (under) fixing screws
Pipe box
(under)
Screw
Insulations
(15 x 15 x 46)
Photo 2-3
Sensor holders
Header assy
LEV assy
hole
Insulation sheet
26
PHOTO: PAC-MK53BC
Controller cover
fixing screw
Controller cover
Screws
Insulations
(15 x 12 x 45)
Rubber mount
Band
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