Mitsubishi Electric PLFY-P05NFMU-E Technical & Service Manual page 30

OPERATING PROCEDURE
8. Removing the drain pump (DP) and float switch (FS)
(1) Remove the panel. (Refer to procedure 2)
(2) Remove the room temperature thermistor (TH21). (Refer to
procedure 4)
(3) Remove the control box cover. (Refer to procedure 3)
(4) Remove the drain pan. (Refer to procedure 5)
Drain pump (See Photo 11 and 12)
(5) Disconnect the drain pump connector from the CNP and
float switch connector from CN4F on the indoor controller
board.
(6) Loosen the clamp fixing the connectors on the side of the
control box.
(7) Cut the hose band and release the hose.
(8) Remove the 2 screws fixing the drain pump and float switch
to the inner cover.
( ) Slide the base plate of the drain pump and float switch as
indicated by the arrow 1 to remove.
(10) Cut the band. (See Photo 12)
(11) Remove the 3 drain pump fixing screws, then remove the
drain pump. (See Photo 12)
Notes:
1. When re-attaching the drain pump, make sure to use a band
to fix the connector to the base plate.
2. Do not give a shock to the float switch. Otherwise it can
cause damage or malfunction.
9. Removing the heat exchanger
(1) Remove the panel. (Refer to procedure 2)
(2) Remove the room temperature thermistor (TH21). (Refer to
procedure 4)
(3) Remove the drain pan. (Refer to procedure 5)
(4) Remove the turbo fan and fan motor. (Refer to procedure 7)
Heat exchanger (See Photo 13 and 14)
(5) Remove the 3 pipe cover fixing screws to remove the pipe
cover.
(6) Remove the 2 coil plate fixing screws.
(7) Remove the coil support fixing screw, then remove the coil
support.
(8) Remove the heat exchanger.
OCH604A
PHOTOS/FIGURES
Photo 11
Screw
1
Drain
pump (DP)
Hose
Hose band
Photo 12
Drain pump (DP)
Drain pump
fixing screws
Base plate
Photo 13
Pipe cover
Photo 14
Coil plate
Coil plate
fixing
screws
Heat
exchanger
30
Clamp
Inner cover
Screw
Float switch (FS)
Drain pump
fixing screws
Band
Float switch (FS)
Pipe cover fixing screws
Pipe cover fixing screw
Coil support Coil support
fixing screw