Mitsubishi Electric EHST20C-VM2C.UK Service Manual page 62

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 contac-
tors 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.
OCH570
PHOTOS
Photo 3-1
Control box
Controller
board
Screw
* The photos shown are of the EHST20C-VM6C model
with optional immersion heater.
Photo 3-2
Board supports
62
Earth leakage circuit
breakers (ECB1, ECB2)
Contactors
Terminal block (TB1)
Board supports
Controller
board