How To Remove The Electrical Parts; Contactor; Terminal Block; Controller Board - Mitsubishi Electric EHST17D-VM2D Service Manual

DISASSEMBLY PROCEDURE

3. How to remove the electrical parts

(Step (1) is applied to all the following parts.)
(1) Remove the front panel. (Refer to Procedure 1.)
<Earth leakage circuit breaker> (Photo 3-1)
(2) Disconnect all the lead wires from the earth leakage cir-
cuit breaker.
(3) Remove the 2 screws on the earth leakage circuit breaker.
Note:
To avoid dropping of the breaker, hold the breaker by hand
when removing the last screws.
<Contactor> (Photo 3-1)
(2) Disconnect all the lead wires from the contactors.
(3) Remove the 2 screws on each contactor.
Note:
To avoid dropping of the contactors, hold the contactors by
hand when removing the last screws.
To prevent an electrical shock, wait until all the LED lamps
on the FTC control board are turned off.
<Terminal block> (Photo 3-1)
(2) Disconnect all the lead wires from the terminal block. (To
disconnect the S1, S2 and S3 lead wires, disengage the
locks by pressing on the claws.)
(3) Remove the screw on the terminal block.
Note:
To avoid dropping of the terminal block, hold the terminal
block by hand when removing the screw.
<Controller board> (Photo 3-2)
(2) Disconnect all the lead wires from the controller board.
(3) Remove the controller board from the 4 board supports.
OCH714A
PHOTOS/ FIGURES
Photo 3-1

Controller board

Screw
Terminal block (TB1)
Note: The photos shown are of the EHST20C-YM9D model.
Photo 3-2
Board supports
66
Earth leakage circuit
Control box
breaker (ECB1)
Screws
Contactors
Board supports
Controller
board