Mitsubishi Electric M Series Manual page 502

MULTI SYSTEM Inverter Heat Pump
PAC-AK50BC PAC-AK30BC
BRANCH BOX
Note : " PAC - AK30 . 50BC " is only for R410A.
SYMBOL
B.C Branch box controller board
F1 <B.C> Fuse 250V 6.3A
SW1<B.C> Switch for service
CNM<B.C> Connector
LED1~5< B.C> Light emitting diode
LEV - A~E
Linear expansion valve
TH - A~E
Thermistor
Pipe temp.detection/Gas
(0 /15k , 25
TB2B Terminal block/To outdoor unit
Terminal block/To indoor unit - A
TB3A
Terminal block/To indoor unit - B
TB3B
Terminal block/To indoor unit - C
TB3C
Terminal block/To indoor unit - D
TB3D
Terminal block/To indoor unit - E
TB3E
Note
1. At servicing for outdoor unit, always follow the wiring diagram of Outdoor unit.
2. Symbols used in wiring diagram above are,
(Combination of indoor units)
Fill out the location of combined indoor units with model name in each
blank below because it is necessary for service and maintenance.
Indoor unit - A Indoor unit - B Indoor unit - C Indoor unit - D Indoor unit - E
Setup of SW1
Make it the same setup as former
one when exchanging PCB.
(PAC - AK50BC only)
TB3E
S1
TO INDOOR
S2
UNIT - E
S3
(PAC-AK50BC only) TB3D
S1
TO INDOOR
S2
UNIT - D
S3
TB3C
S1
TO INDOOR
S2
UNIT - C
S3
TB3B
S1
TO INDOOR
S2
UNIT - B
S3
TB3A
S1
TO INDOOR
S2
UNIT - A
S3
TB2B
S1
TO OUTDOOR
S2
UNIT
S3
C-500
NAME
/5.4k )
: terminal block,
ON
OFF
SW1
YLW
5
ORN TB3E
3
(GRN)
BRN
1
YLW
5
ORN TB3D
3
(BLK)
BRN
1
YLW
5
TB3C
ORN
3
(BLU)
BRN
1
YLW
5
TB3B
ORN
3
(RED)
BRN
1
YLW
5
TB3A
ORN
3
(WHT)
BRN
1
YLW
ORN
1
CN3C
BRN
(BLU)
3
3 F1
CND
(ORN)
1
TB1
: connector.
LED1 LED2 LED3 LED4 LED5
1 2 3 4 5 6 7 TH-A
(WHT)
8 9 10 11 12 13 14
CNM
TH-B
(RED)
TH-C
(BLU)
TH-D
(BLK)
TH-E
(GRN)
LEV-A
(WHT)
LEV-B
(RED)
LEV-C
(BLU)
LEV-D
(BLK)
LEV-E
(GRN)
M series
B.C
1
TH - A
2
1
TH - B
2
1
TH - C
2
1
TH - D
2
PAC - AK50BC only )
(
1
TH - E
2
LEV - A
6
1
6
LEV - B
6
1
6
LEV - C
6
1
6
LEV - D
6
1
6
(PAC - AK50BC only)
LEV - E
6
1
6