Mitsubishi Electric City Multi CMH-WM250V-A, Service Handbook

Page: 326 / 436

[8-13 Parts Replacement Instructions ]
BS_08_E chapter 8 -
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8-13 Parts Replacement Instructions
8-13-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant
Circuit Parts)
1. S-module
Take the following procedures to ensure sufficient maintenance space and good visibility.
Figure 1
Drain pan
Figure 2
Drain pan cover
Figure 4
Top attachment
Bottom attachment
Main control box
Inverter control box
Figure 5
Figure 6
cable tie
Cable strap
Cable strap
cable tie
Figure 7
cable tie
Figure 3
Rod holder
Drain pan cover
Silicon tube
Defrost pipe
(1) Remove the front panel from the unit by unscrewing the eight screws. (See Figure 1.) *Figure 1 shows the unit without the
front panel.
(2) Remove the drain pan cover by unscrewing the screw and cutting the cable tie. (See Figures 2 and 3.)
When re-placing the drain pan cover after the completion of maintenance work, make sure that the silicon tube is properly placed
on the defrost pipe, and then fix the drain pan cover in place with a cable tie. (Figures 2 and 3 show the cable ties to be cut.)
(3) Remove the drain pan by unscrewing the two screws. (See Figure 2.)
Be sure to remove the two rod holders holding the check joints to the drain pan. (See Figure 3.)
(4) Remove the top attachment connecting the main control box and the inverter control box by unscrewing the two screws.
(See Figure 4.)
(5) Remove the bottom attachment connecting the main control box and the inverter control box by unscrewing the two screws.
(See Figure 4.)
(6) Remove the cover from the main control box by unscrewing the three screws. (See Figure 5.)
(7) Cut the two cable ties holding the weak electrical wiring inside the main control box in place, and loosen the four cable
straps holding the weak and strong electrical wirings. (See Figure 6.)
(8) Cut the two cable ties holding the rubber bush at the bottom of the main control box. (See Figure 6.)
(9) Cut the three cable ties and loosen the two cable straps holding the weak electrical wiring outside the main control box.
(See Figure 7.)
Cable strap for
holding weak
electrical wiring
(front)
Cut the cable tie. Cut the cable tie.
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