Disassembly Procedure; How To Remove The Front Panel; How To Remove The Main Controller - Mitsubishi Electric EHST20C-VM6HB Service Manual

11

DISASSEMBLY PROCEDURE

<Preparation for the repair service>
● Prepare the proper tools.
● Prepare the proper protectors.
● Provide adequate ventilation.
● After stopping the operation of the cylinder and outdoor unit, turn off the power-supply breaker and remove the
power plug.
● Discharge the condenser before the work involving the electric parts.
● Allow parts to cool.
● Do not expose the electric parts to water.
● When replacing or servicing water circuit parts, drain system first.
EHST20C-VM6HB, EHST20C-YM9HB, EHST20C-VM6B, EHST20C-YM9B, EHST20C-VM6EB,
EHST20C-YM9EB, EHST20C-VM6SB, EHPT20X-VM2HB, EHPT20X-VM6HB,
EHPT20X-YM9HB, EHPT20X-VM6B, EHPT20X-YM9B
Check individual illustrations and positions of the parts by referring to the parts catalog included in this manual.
Some lead wires and pipes are bundled with bands. Cut the bands to undo the fastened pipes and lead wires if necessary.
When bundling the lead wires and pipes again, use new commercially available bands.
When removing the parts associated with water pipe work, drain the cylinder unit as necessary (Refer to "Draining the cylinder
unit" on page 32.
When draining the cylinder unit, keep water from splashing on the internal parts (mainly electric parts and insulations).
DISASSEMBLY PROCEDURE

1. How to remove the front panel

(1) Remove the 2 screws at the bottom of the cylinder unit. (Photo
1-1)
(2) Slightly lift and pull out the front panel from the cylinder unit. (Photo
1-1)
(3) Disconnect the relay connector connecting from the main
controller. (Photo 1-)
Photo 1-2

2. How to remove the main controller

(1) Remove the front panel. (Refer to Procedure 1).
(2) Turn the front panel over and remove the 4 screws retaining the
controller support. (Photo -1)
(3) Remove the main controller from the case while moving up the
claw at the top of the case. (Figure 2-1)
Figure 2-1
OCH531
Photo 1-1
Connector
Photo 2-1
69
PHOTOS & ILLUSTRATION
Front panel
Front panel fixing screws
Controller support
Screws
Main controller
Front panel