Maintenance Procedures For The Heat Exchanger - Mitsubishi Electric PUHY-P250YNW-A Service Handbook

[8-12 Parts Replacement Instructions ]
8-12-7

Maintenance Procedures for the Heat Exchanger

1. S-module
Front of the unit
(1) Remove the front panel from the unit by unscrewing the 8 screws. (See Figure 2.)
(2) Remove the fin guard by unscrewing the 6 screws. (See Figure 2.)
(3) Remove the drain cover by unscrewing the screw and cutting the cable tie. (See Figures 3 and 4.)
When re-placing the drain pan cover, 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.
(4) Remove the drain pan by unscrewing the 2 screws. (See Figure 2.)
Be sure to remove the two rod holders holding the check joints to the drain pan. (See Figure 4.)
Fin guard
Drain pan cover
Figure 2
(5) Remove the top attachment that connects the main control box to the inverter control box by unscrewing the 2 screws.
(See Figure 5.)
(6) Remove the cover from the inverter control box by unscrewing the 3 screws. (See Figure 5.)
(7) Remove the cable straps holding motor wiring. (See Figure 6.)
Main control box
Figure 5
BS_08_C
Rear heat exchanger
Front heat exchanger
Figure 1
Drain pan
Drain pan cover
Figure 3
Top attachment
Inverter control box
Rod holder
Defrost pipe
Silicon tube
Figure 4
Cable strap
Figure 6
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