Mitsubishi Electric PAC-MK34BC, Technical & Service Manual

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10
OCH744
5 WIRING DIAGRAM
PAC-MK54BC PAC-MK34BC
<Note>
1. At servicing for outdoor unit,
always follow the wiring diagram
of outdoor unit.
2. When work to supply power
separately to Branch box and outdoor
units are applied, refer to Fig. 1.
However, when the Branch box is
connected to MXZ-6C/8C ∙ NAM1/XAM,
power must not be supplied separately.
3. For the connection method, please
refer to the installation manual of
Branch box for details.
<Combination of indoor units>
Enter the location of combined indoor units with model name in each
blank below because it is necessary for service and maintenance.
SYMBOL
B.C.
LEV-A~E
TH-A~E
TB2B
TB5
REACTOR BOX
F1
F2~F4
SW1
SW4
SW5
CNM
LED1,2
TB3A~E
SW11
SW12
TB2C
TB2D
Branch box controller board
Fuse <T6.3AL 250V>
Fuse <T10AL 250V> * 1
Switch for indoor unit connection * 2
Switch for function selection
*
3
Switch for function selection * 4
Connector <Connection for service>
Light emitting diode
*
5
Terminal block <To Indoor unit-A~E> * 6
Address Setting ones digit
Address Setting tens digit
Linear expansion valve
*
6
Thermistor <Gas pipe> * 6
Terminal block <To Power Supply>
Transmission line
Optional parts
Terminal block <To Power Supply>
Terminal block <To Branch box (TB2B)>
NAME
Indoor unit-A Indoor unit-B Indoor unit-C Indoor unit-D Indoor unit-E
<Symbols used in wiring diagram>
: Terminal block, : Connector
: Dip switch (■ (black square)
indicates a switch position)
After each indoor unit is connected to the outdoor unit, turn on
the switch corresponding to each indoor unit. For example,
when the indoor units are connected to INDOOR UNIT-A
and C, turn SW1-1 and SW1-3 to on.
*
3 SW4 setting
When the outdoor unit is cooling only system, turn
SW4-5 to on.
*
4 Refer to the installation manual of Branch box for details.
*
5 LED on Branch box controller board for service
* 6 D and E for PAC-MK54BC only
• start-up
Mark
LED 1
LED 2
Main power supply
Meaning
Main power supply (220/230/240V)
Power on → Lamps are lit
Function
Mark
LED 2 Total number of
indoor units
Meaning
Blink depend on the total number
<example> The total number is 2
1 Blink 2 times.
2 Turn off for 3 sec.
3 Repeat 1 to 2 .
LED 1 Main power supply Lamp is lit
Function
• normal operating
PAC-MK
54BC
only
BU BU
BK
WH RD
BU
BK
WH
TO OUTDOOR UNIT
LEV-E
LEV-D
LEV-C
LEV-B
LEV-A
TH-E
tº
TH-D
tº
TH-C
tº
TH-B
tº
TH-A
tº
1 2 3 4 5 6
SW5
ON
OFF
10s
DIGIT
1s
DIGIT
TO
INDOOR
UNIT-E
TO
INDOOR
UNIT-D
TO
INDOOR
UNIT-C
TO
INDOOR
UNIT-B
TO
INDOOR
UNIT-A
L
N
S3
S2
S1
S3
S2
S1
S3
S2
S1
S3
S2
S1
S3
S2
S1
M1
M2
S
TO OUTDOOR UNIT
DC24-30V
TB3E
TB3C
TB3A
TB3D
TB3B
TB1
F4
F3
F2
TB2B
L
N
L
N
TB5
(SHIELD)
(SHIELD)
CND
(BK)
F1
+ –
3
1
5
LEV-E
(GN)
1
5
LEV-D
(BK)
1
5
LEV-C
(BU)
1
5
LEV-B
(RD)
1
5
LEV-A
(WH)
1
2 TH-E
1 (GN)
2 TH-D
1 (BK)
2 TH-C
1 (BU)
2 TH-B
1 (RD)
2 TH-A
1 (WH)
M
M
M
M
M
(PAC-MK54BC only)
(PAC-MK54BC only)
0 1
2
3
45
6
7
8
9
SW12
0 1
2
3
45
6
7
8
9
SW11
ON
OFF
1 2 3 4 5 6 7 89 10
SW4
*
3
1 2 3 4 5 6
SW1 * 2
ON
OFF
LED1
LED2
CNM
(WH)
1
14
INDOOR UNIT-A
INDOOR UNIT-B
INDOOR UNIT-C
INDOOR UNIT-D
INDOOR UNIT-E
NO USE
SW1-1
SW1-2
SW1-3
SW1-4
SW1-5
SW1-6
NOT CONNECT
NOT CONNECT
NOT CONNECT
NOT CONNECT
NOT CONNECT
CONNECT
CONNECT
CONNECT
CONNECT
CONNECT
*
1 F4 for PAC-MK54BC only
*
2 SW1 setting
OFF ON
Cooling & Heating system
SW4-5
Cooling only system
OFF ON
B.C.
BU
BU
(PAC-MK54BC only)
TO ANOTHER
BRANCH BOX
TO ANOTHER BRANCH BOX or
M-NET CONTROL INDOOR UNIT
POWER SUPPLY
220/230/240V 50Hz
220/230V 60Hz
L
N
TB2B
TO ANOTHER
BRANCH BOX,
REACTOR BOX
(optional parts)
*
7
or M-NET
CONTROL
INDOOR UNIT
CIRCUIT
BREAKER
Fig. 1
PULL
BOX
M-NET
CN3M
(BU) 1
3
PULL
BOX
REACTOR BOX (optional parts)
*
7
L
N
L
N
* 7 Depending on which
indoor unit is combined
with which outdoor unit,
reactor box should be
installed.
Refer to the installation
manual of Branch box or
that of outdoor unit for
details.
REACTOR BOX
(optional parts)
*
7
TB2D TB2C
TB2D TB2C