Mitsubishi Electric Mr. SLIM PCA-A GA Series Installation Manual page 9

6. Electrical work
6.1.3. K-control application
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
<For heat pump models>
C
L1
A B H B
L2
GR
S1
S2
S3
D
Set the DIP switch of the indoor
unit control board.
SW5
1
2 3
SW5–1 : ON SW5–2, 3 : OFF
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
To change to K-control, set the DIP switch (SW5) of the indoor unit control board as
shown in the above figure and change the electric wiring of the indoor unit as shown
in the right figure.
Set up Dip switch after turning off Power supply switch.
Be careful that setting the DIP switch (SW5) of the indoor unit control board varies
between the heat pump models and cooling models of the outdoor unit.
DIP switch (SW5)
OFF
SW5–1 A–CONTROL
SW5–2 heat pump models
SW5–3 MAIN
* There are three types of labels (labels A, B, and C). Affix the
appropriate labels to the units according to the wiring method.
Indoor unit model
Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit
Indoor unit earth
Remote controller-Indoor unit
Indoor unit L1-L2
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S1-S3
Remote controller-Indoor unit
*1. Max. 50 m, 165 ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 500 m, 1500 ft
*3. The figures are NOT always against the ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Use copper supply wires.
3. Use wires rated 300V or more for the power supply cables.
4. Install an earth longer than other cables.
<For cooling only models>
F
L1
A
L2
GR
S1
S2
S3
1
E
2
ON
K–CONTROL
} Dip switch SW 5-2 and SW 5-3 is effective
cooling only models
only when Dip switch 5-1 (K-CONTROL) is
SUB
ON.
*1
*2
*3
*3
*3
*3
1:1 System
G
C
L1 L1
B H B
L2
L2
GR
GR
S1 S1
S2
S2
D
S3 S3
1
E
2
Set the DIP switch of the indoor
unit control board.
SW5
1 2
3
SW5–1, 2 : ON SW5–3 : OFF
PCA
Single 208/230 V, 60 Hz
1 A
15A
2 × Min. AWG16
1 × Min. AWG16
H/P: 3 × AWG22 (polar)
C/O: 2 × AWG22 (polar)
–
2 × AWG22 (Non-polar)
AC 208/230 V
DC12 V
DC12 V
DC12 V
A Outdoor unit power supply
B Wiring circuit breaker or isolating switch
C Outdoor unit
D Indoor unit/outdoor unit connecting cords
E Remote controller
F Indoor unit <For heat pump models>
G Indoor unit <For cooling only models>
H Indoor unit power supply
L1
Connectors
L2
GR
ORANGE
CND
S1
S2
INDOOR UNIT
S3
CONTROL BOARD
BLUE
CN3C
BLACK
CN30
To change to the K-control,
make sure to change the
L1
connectors as shown in the
L2
figure.
GR
ORANGE
CND
S1
S2
S3 INDOOR UNIT
CONTROL BOARD
BLUE
CN3C
BLACK
CN30
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