Mitsubishi Heavy Industries FDC224KXZPE1 Service Manual Download

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135

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'14 • KX-SM-221

※

Use a shielded cable.

The communication protocol can be choosen from following two types. One of them is the conventional Superlink (hereinafter previous SL) and the other is the new Superlink

Ⅱ

(hereinafter new SL) . These two communication protocols have the following advantages and restrictions, so choose a desirable one meeting your installation conditions such as

connected indoor units and centralized control. When signal cables are connected into a network involving outdoor units, indoor units or centralized control equipment that do not

support new SL, select communications in the previous SL mode, even if the refrigerant system is separated from theirs.

(1) When one outdoor unit is used.

(3) The signal lines can also be connected using the method shown below.

○

Indoor and outdoor signal lines do not have a polarity.

Any of the connections in the following illustration can be made.

(2) When plural outdoor units are used

Outdoor unit

Signal line

Refrigerant pipe

Network connector

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor signal line

terminal block

Indoor signal line

terminal block

○

Loop wiring prohibited.

The signal lines cannot form a
loop, so the wirings shown as .......
in the diagram are prohibited.

Important

●

Connect the signal line between indoor unit and outdoor unit to A1 and B1.

●

Connect the signal line between outdoor units to A2 and B2.

●

Use a shielded cable for a signal line and connect a shielding earth at all the indoor units and outdoor units.

Ａ

1 B1

A1・B1 A2・B2

ＡＢ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

A1・B1 A2・B2

●

Address setting methods

The following address setting methods can be used. The procedure for automatic address setting is different from the conventional one.

Use the automatic address setting function after reading this manual carefully.

This control system controls the controls of more than one air-conditioner's outdoor unit, indoor unit and remote control unit through communication control, using the microcomputers built in
the respective controls. Address setting needs to be done for both outdoor and indoor units. Turn on power in the order of the outdoor units and then the indoor units.

Give a one-minute or longer interval for them.

The communication protocol can be chosen from following two types. One of them is the conventional communication protocol (previous SL) and the other is the new communication protocol (new
SL). These two communication protocols have their own features and restrictions as shown by Table 6-3. Select them according the indoor units and the centralized control to be connected.
When signal cables are connected into a network involving outdoor units, indoor units or centralized control equipment that do not support new SL, select communications in the previous SL mode,
even if the refrigerant system is separated from theirs.

When communication is established after setting addresses, check the communication protocol with the 7 segment display panel of the outdoor unit.

Signal line

CASE 1

CASE 2

CASE 3

CASE 4

Refrigerant pipe

Network connector

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Indoor unit address setting

000

〜

127[47]

000

〜

31[47]

Indoor unit address setting

〜

31[47]

〜

Outdoor unit address setting

〜

Outdoor unit address setting

0 1

●

Address No. setting

Set SW1 ~ 4 and SW5-2 provided on the PCB and SW1 & 2 provided on the outdoor unit PCB as shown in the drawings below.

※

1 Do not connect the signal line between outdoor units to A1 and B1. This may interrupt proper address setting. (Case 3)

Do not connect the signal line between indoor unit and outdoor unit to A2 and B2. This may interrupt proper address setting. (Case 4)

※

2 In Case 2, automatic address setting is not available. Set addresses manually.

A1・B1 A2・B2

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

A1・B1 A2・B2

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

A1・B1 A2・B2

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

A1・B1 A2・B2

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

Ｂ

Ａ

A1・B1 A2・B2

●

Do not set numbers other than those shown in the table, or an error may be generated.

Note: When units supporting new SL are added to a network using previous SL such as one involving FD

○

△△

KXE4 series units, choose previous SL for the communication protocol and set addresses manually.

Since the models FDT224 and 280 have 2 PCBs per unit, set different indoor unit No. and SW on each PCB.

●

An outdoor unit No., which is used to identify which outdoor unit and indoor units are connected in a refrigerant system, is set on outdoor unit PCB and indoor unit PCB. Give the same outdoor unit

No. to all outdoor unit and indoor units connected in same refrigerant system.

●

An indoor unit No. is used to identify individual indoor units. Assign a unique number that is not assigned to any other indoor units on the network.

Incorrect cable connection

(The signal line between outdoor units is connected to A1 and B1)

Incorrect cable connection

(The signal line between indoor unit and outdoor units is connected to A2 and B2)

Manual address setting

(previous SL/new SL)

Units supporting new SL

Units NOT supporting new SL

SW1 (SW3)

SW2 (SW4)

For ten’s place

For one’s place

(precision screw driver) into this

groove and turn the arrow to

point a desired number.

Indoor PCB

Outdoor PCB

SW1, 2 (blue)

SW3, 4 (green)

SW5-2

SW1, 2 (green)

For setting indoor No. (The ten’s and one’s)
For setting outdoor No. (The ten’s and one’s)
Indoor No. switch (The hundred’s Place) [OFF : 0, ON : 1]
For setting outdoor No. (The ten’s and one’s)

Automatic address setting for

multiple refrigerant systems installation

(with new SL only)

Automatic address setting for

single refrigerant system installation

(previous SL/new SL)

Indoor No. switch

Outdoor No. switch

Indoor No. switch

Outdoor No. switch

(1) In the case of a single refrigerant system installation

①

Outdoor unit address setting

Set as follows before you turn on power.
Make sure that the

Outdoor Unit No. switch

is set to

49 (factory setting)

②

Indoor unit address setting

Set as follows before you turn on power.
Make sure that the

Indoor Unit No. switch

is set to

000 [in the case of previous SL: 49] (factory setting)

Make sure that the

Outdoor Unit No. switch

is set to

49 (factory setting)

③

Turn on power in order from the outdoor unit to indoor units. Give a one-minute or longer interval for them. Unlike the procedure set out in (2) below, you need not change settings from the 7

segment display panel.

④

Make sure that the number of indoor units indicated on the 7 segment display panel agrees with the number of the indoor units that are actually connected to the refrigerant system.

(2) In the case of a multiple refrigerant systems installation

(Applicable to new SL only. In the case of previous SL, set addresses by manual setting.)

(This option is available when the interconnection wiring among refrigerant systems is on the outdoor side and new SL is chosen as the communication protocol.)

Address setting procedure

(perform these steps for each outdoor unit)

[STEP1]

(Items set before turning on power)

①

Outdoor unit address setting

Set as follows before you turn on power.
Set the

Outdoor Unit No. switch

to a number

00 - 31

. Set a unique number by avoiding the numbers assigned to other outdoor units on the network.

②

Indoor unit address setting

Set as follows before you turn on power.
Make sure that the

Indoor Unit No. switch

is set to

000 (factory setting)

Make sure that the

Outdoor Unit No. switch

is set to

49 (factory setting)

③

Isolate the present refrigerant system from the network.

Disengage the

network connectors (white 2P)

of the outdoor units. (Turning on power without isolating each refrigerant system will result in erroneous address setting.)

[STEP2]

(Power on and automatic address setting)

④

Turn on power to the outdoor unit

Turn on power in order from the outdoor unit to indoor units. Give a one-minute or longer interval for them.

⑤

Select and enter “1” in P31 on the 7 segment display panel of each outdoor unit to input “Automatic address start.”

⑥

Input a starting address and the number of connected indoor units.

Input a starting address in P32 on the 7 segment display panel of each outdoor unit.

⑦

When a starting address is entered, the display indication will switch back to the “Number of Connected Indoor Units Input” screen.

Input the number of connected indoor units from the 7 segment display panel of each outdoor unit. Input the number of connected indoor units for each outdoor unit. (You can input it from P33
on the 7 segment display panel.)When the number of connected indoor units is entered, the 7 segment display panel indication will switch to “AUX” and start blinking.

[STEP3]

(Automatic address setting completion check)

⑧

Indoor unit address determination

When the indoor unit addresses are all set, the 7 segment display panel indication will switch to “AUE” and start blinking.
If an error is detected in this process, the display will show “A

○○

.”

Check the 7 segment display panel of each outdoor unit.
Depending on the number of connected indoor units, it may take

about 10 minutes

before the indoor unit addresses are all set.

[STEP4]

⑨

Network connection

engage the network connectors

again.

⑩

Network polarity setting

After you have made sure that the network connectors are engaged

, select and enter “1” in P34 on the 7 segment display panel of

any outdoor unit (on only 1 unit)

to specify

network polarity.

⑪

Network setting completion check

ion is made from the 7 segment display panel or

3 minutes after.

①

Outdoor unit address setting

Set as follows before you turn on power. Upon turning on power, the outdoor unit address is registered.
Set

the Outdoor Unit No. switch to a number 00 - 31 [in the case of previous SL: 00 - 47]

Set a unique number by avoiding the numbers assigned to other outdoor units on the network.

②

Indoor unit address setting

Set as follows before you turn on power. Upon turning on power, the indoor unit address is registered.
Set

the Indoor Unit No. switch to a number 000 - 127 [in the case of previous SL: 00 - 47]

Set

the Outdoor Unit No. switch

to the outdoor unit No. of the associated outdoor unit within the range of

00 - 31 [in the case of previous SL: 00 - 47].

Set a unique number by avoiding the numbers assigned to other indoor units on the network.

③

Turn on power in order from the outdoor unit to indoor units. Give a one-minute or longer interval for them.

* When there are some units not supporting new SL connected in the network, set SW5-5 to ON to choose the previous SL communication mode.
In the case of previous SL, the maximum number of indoor units connectable in a network is 48.

Unless stated otherwise, the following procedures apply, when new SL is chosen for the communication protocol.

With new SL, you can set indoor unit addresses automatically even for an installation involving multiple refrigerant systems connected with same network, in addition to the conventional automatic
address setting of a single refrigerant system installation.
However, an installation must satisfy some additional requirements such as for wiring methods, so read this manual carefully before you carry out automatic address setting.

②

OFF

①

OFF

②

indoor000/outdoor 49

(

factory setting

)

①

01,02(Ex

）

③

Disconnect(each outdoor unit)

STEP1

STEP2

STEP3

STEP4

ー
ー

ー

ー
⑨

Connect(each outdoor unit)

ー

⑩

Set in P34 on the 7 segment display

panel of any outdoor unit.

⑪「

End

」

ー
ー

ー

ー
ー

ー

⑧

“AUE”(blinking), or “A

○○

” in error events.

Indoor unit power source
Outdoor unit power source
Indoor unit
(indoor/outdoor No.SW)

Outdoor unit (outdoor No.SW)
Network connectors

Start automatic address setting

Set starting address

Set the number of indoor unit

Polarity setting

7 segment display

④

⑦

outdoor 01:

｢

｣

(Ex)

outdoor 02:

｢

｣

(Ex)

⑥

outdoor 01:

｢

｣

(Ex)

outdoor 02:

｢

｣

(Ex)

⑤

Select “Automatic Address Start”

on each outdoor unit.

⑦［

AUX

］

(blinking

）

ー

●

Signal cables are for DC 5 V. Never connect wires for 220/240 V or 380/415 V.

Protective fuse on the PCB will trip.

①

②

Before turning the power on, check the resistance on the signal cable terminal block. If it is less than 100Ω, power source cables may be connected to the signal cable

terminal block.
When units of FD

○△△

KXE6 Series, FD

○△△

KXZ series are connected:

Standard resistance value=5,100/Number of connected units.

When units of FD

○

△△

KXE4 and 5 Series only are connected:

Standard resistance value=9,200/Number of connected units.

When units of FD

○△△

KXE6 Series, FD

○△△

KXZ series and units of FD

○

△△

KXE4 and 5 Series are connected in a mixture:

Standard resistance value=46,000/[(Number of connected FD

○

△△

KXE4 and 5 Series units x 5) + (Number of connected FD

○△△

KXE6 and KXZ Series units x 9)]

The number of connected units includes those of indoor units, outdoor units and SL devices..
If the resistance value is less than 100Ω, disconnect the signal cables temporarily to divide to more than one network, to reduce the number of indoor units on the same
network, and check each network.

Outdoor unit setting (SW5-5)
No. of connectable indoor units
No. of connectable outdoor units in a network
Signal cable (total length)

Signal cable (furthest length)
Connectable units to a network

ON
Max. 48
Max. 48
Up to 1000m

Up to 1000m
Units not supporting new SL (FD

○

△△

KXE4.5

series)

Units supporting new SL (FD

○△△

KXE6

series, FD

○△△

KXZ

series)

Can be used together.

OFF (Factory default)
Max. 128
Max. 32
Up to 1,500 m for 0.75 mm

shielding wire (MVVS)

Up to 1,000 m for 1.25 mm

shielding wire (MVVS)

Up to 1000m
Units supporting new SL (FD

○△△

KXE6

series, FD

○△△

KXZ

series)

Conventional communication protocol (previous SL)

Communication protocol

New communication protocol (new SL)

Note: For FDT224 and 280 models, calculate the number of units taking 1 indoor unit as 2 units for the sake of communication.

Grounding terminal

Power souce, signal line and ground terminal block

12.5 mm or less

7 mm or less

7-1. Unit address setting

Communication protocol

Address setting method

※

new SL

previous SL

Automatic Manual Automatic Manual

7. CONTROL SETTINGS

Case 1

Case 2

When signal lines linking plural refrigerant systems are provided between outdoor units.

(When the network connector is disconnected, refrigerant systems are separated each other)

When signal lines linking plural refrigerant systems are provided between indoor units.

When only one refrigerant system is involved (signal lines do not link plural refrigerant systems)

Indoor and outdoor units signal cables

Power cable and signal cable connection

Request

●

When connecting to the power source terminal block,

use the crimp terminals for M5 as shown at right.

●

When connecting to the signal terminal block, use

the crimp terminals for M3.5 as shown at right.

When plural refrigerant systems

are linked with signal lines

(e.g., to implement centralized

control)

Model

224KXZPE1

280KXZPE1

Power source

Three-phase

380/415V 50Hz

380V 60Hz

Cable size for

power source (mm

)

5.5

Rated current

Switch capacity

Earth leakage breaker

Size (mm

)

Screw type

Moulded-case circuit breaker (A)

Earth wire

Wire length

(m)

30A, 30mA

less than 0.1 sec

Signal line (mm

)

20A, 30mA

less than 0.1 sec

3.5

5.5

30A, 30mA

less than 0.1 sec

2 core

0.75

※

Rated current Switch capacity

Moulded-case circuit breaker (A)

Earth leakage breaker

outdoor-indoor indoor-indoor

Combined total capacity

of indoor units

Cable size for

power source(mm

) Wire length(m)

less than 7A

less than 11A

less than 12A

less than 16A

●

Do not connect to the grounding wire from another unit, but install a

dedicated wire up to the grounding wire from the distribution board.

●

As like the refrigerant pipe, it can be let out in any of the following

direction: right, front, rear and downward.

Wiring clamp

Wiring diagram

●

It is attached on the back side of the service panel.

Outgoing cable direction

6-3. How to connect signal cables

(Outdoor unit is another power source)

Note:

a) The method of laying cables has been determined pursuant to

the Japanese indoor wiring regulations (JEAC8001). (Please

adapt it to the regulations in effect in each country)

b) Wire length in the table left is the value for when the indoor unit

is connect to the power cable in series also the wire size and

minimum length when the power drop is less than 2% are

shown. If the current exceeds the value in the table above,

change the wire size according to the indoor wiring regulations.

(Please adapt it to the regulations in effect in each country)

c) For details, refer to the installation manual supplied with the

indoor unit.

d) Wires connected to indoor units are allowed up to 5.5 mm

. For

8 mm

or more, use a dedicated pull box and branch to indoor

units with 5.5 mm

or less.

(1)

A standard remote control wire is 0.3mm

x 2 cores (FD

○△△

KXE6 indoor unit), 0.3mm

x 3 cores (FD

○

△△

KXE4.5 indoor unit).

It can be

extended

up to 600m. For a remote control wire exceeding 100m,

upgrade wire size

100 to 200

To 300
To 400
To 600

0.5mm

2 cores

0.75mm

2 cores

1.25mm

2 cores

Length (m)

Wire size

○△△

KXE6 indoor unit

(2) When the remote control wire runs parallel to another power source wire or when it is subject to outside noise, such as from a high-frequency device, use

shielded wire. (Be sure to ground only one end of the shielded wire.)

power cable (220-240V)

Indoor unit

In addition to a possible wiring error between indoor and outdoor units, there are other possibilities of erroneous wiring as illustrated below.

It will result in a blown signal line fuse (CNK).

①

Wrong wiring between signaling wires and

remote control wires.

②

Connecting power cables to the signaling wire

terminal block.

For remote control