Mitsubishi Electronics PUHY-YMC Control box and connecting posi- tion of wiring, J B F, C D A E

11.2.Control box and connecting posi- tion of wiring

a. Variable capacity unit

1.Remove the total of six screws at the top and bottom, and remove the service panel by pulling it forward. (see the figure below.)

A

A Service panel

2.Remove the two screws on the left and right-hand of the base of the control box and pull the overall cover downwards to detach it. (a dia- gram with the control box cover removed is shown below.)

J

B

F

LD1

C D A

E

L1 L2 L3 N

TB1 M1 M2 M1 M2 S

TB3 TB7

G H I

AINV board

BMAIN board

CTen position

DOne position

EAddress

FFANCON board

GPower source

HEarth screw

ITransmission line

JRELAY board

3.Connect indoor and outdoor units through the terminal block for trans- mission lines (TB3). Outdoor units and connections to central control systems go through the terminal block for centralized control (TB7). When making an indoor/outdoor connection with shielded wiring, con-

nect the shield ground to the earth screw (). When making a cen- tral control system connection with shielded wiring, use the terminal

block for centralized control (TB7).

When the CN41 power supply connector of an outdoor unit has been replaced with a CN40, the shield terminal (S) for centralized control (TB7) should also be connected to the earth screw ().

4.How to use the conduit mounting plate

(1)Conduit mounting plates (ø46, ø53, ø62) are being provided.

Select conduit mounting plate based on the outside diameter of con- duit to be used and mount it as shown in the figure.

(2)Fix power source wiring to control box by using buffer bushing for tensile force (PG connection or the like)

A

B

C

D

E

A B

G

knockout hole

FTo prevent external tensile force from applying to the wiring connection section of power source terminal block, use buffer bushing like PG connection or the like.

Aø 46 mounting hole

Bø 53 mounting hole

Cø 62 knockout hole

DFor the connection of conduit at bottom

Eø 62 mounting hole

FFor the connection of conduit at front

G The front of outdoor unit

b.Constant capacity unit

1.The service panel is removed by removing the six screws at the top and bottom and pulling it forward. (see figure below.)

Service panel

ENGLISH

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