Mitsubishi Electric PLFY-P-VLMD-E Service Manual download pdf (Page 27)

8-4.Thermistor

OPERATING PROCEDURE

1. Remove the service panel and filter with the pro-

cedure explained in section 8-1.

2. Remove the decorative panel frame.

(1) Loosen the four stepped screws fixing the panel,

and suspend the panel frame. (Fig. 4-1)

(2) When the panel frame is pressed (or pulled) in the

longitudinal direction, the stepped screws will

come out of the key holes provided on the panel

frame, and the panel frame will come off.

3. Remove the bell-mouth with the procedure

explained in section 8-3 .

4. Remove the control box.

(1) Remove the control box cover with the procedure

explained in section 8-2.

(2) Disconnect the following lead wire connectors

from the control box. (Photograph 4-1)

• Power supply lead wire (CND, 5P: red)

• Drain pump lead wire (CNP, 3P: blue)

• Drain sensor lead wire (CN31, 3P: white)

• LEV lead wire (CN60, 6P: white)

• Vane motor lead wire for panel (CN7V, 7P: white)

• M-NET transmission lead wire (CN2M, 2P: blue)

• MA remote controller transmission lead wire

(CN3A, 3P: blue)

• Fan motor lead wire (CN90, 9P: blue)

•

Fluid piping temperature sensor lead wire (CN21, 2P: white)

•

Gas piping temperature sensor lead wire (CN29, 2P, black)

(3) Loosen the two screw fixing the control box, and

remove the control box.

5. Remove the drain pan. (Photograph 4-2)

(1) Remove the two drain pan fixing plates B.

(One screw/plate)

(2) Remove the two drain pan fixing plates C.

(Three screws/plate)

(3) Remove the side frame reinforcement plate.

(One screw)

(4) Loosen the rubber plug on the drain pan's

drainage socket, and drain out all water from the

drain pan.

Note: Before removing the rubber plug, prepare a

bucket, etc., so that the drainage will be

caught. The desk or floor should be covered

with a sheet, etc., so that water will not get

on it inadvertently.

(5) Pull down the drain pan.

Note: Pull the drain pan out gradually by shifting

the front and back to the left and right. The

drain pan is made of styrofoam, so take care

not to break it.

6. Remove the thermistor from the thermistor holder

on the copper piping (fluid piping ... thin piping,

gas piping ... thick piping). (Photograph 4-3)

Note: Each thermistor has a notch on the tube to

drain out any water condensed in the piping

tube. That section comes to the very bottom. A

trap is provided so that the water will drip into

the drain pan. Thus, when replacing the thermis-

tor, always set the trap at the original position.

(Fig.4-1)

(Photo.4-1)

(Photo.4-2)

(Photo.4.3)

PHOTOS&ILLUSTRATIONS

Panel frame

Control box

Fixing screw

Fixing plate B

Fixing plate C

Thermistor

Side frame reinforcement plate

Be careful removing heavy parts.

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Mitsubishi Electric PLFY-P-VLMD-E Service Manual Page 27

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