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(8) Remove the cable holder and
connect the cables.
(9) Fix the cable sheath with the
cable holder and the screw.
(10) Double-check that the cable is
securely in place.
(11) Attach the side cover and the
cable cover.
Caution:
• Be very careful not to confuse the terminal
connections. Wrong cabling may damage
the internal control circuit.
• Be sure to connect the cable to match the
markings on the outdoor unit's terminal
board and those of the indoor unit.
• Be sure to put the cable leads deep into the
terminal board and tighten up the screws.
Poor contact can cause overheating or fi re,
or malfunction.
• Be sure to use a disconnect switch. Follow
the local and state electrical codes.
5
POWER CABLING
Prepare a dedicated power supply circuit.
For the connections, see below.
Supply power
Guaranteed voltage
Max. Fuse
Min. Circuit Ampacity
6
WIRE CHECK
Miswiring of connecting cable will be self-corrected by the wire check operation.
(1) Turn the circuit breaker on.
(2) Check that all LED(LED1A, LED1B, LED1C, LED1D) on the display board
are fl ashing simultaneously.
If one or more of the LED is/are kept lit, check for mismatching terminal
markings(L1, L2, 2,
(3) To start the wire check, press the WIRE CHECK button(SW2) for 5
seconds or more.
The operation lamp on the indoor unit will fl ash, and three BEEP will
be emitted.
All LED will fl ash rapidly.
(4) When wire check is completed normally, all LED will fl ash
simultaneously and the operation will stop. (Wire check time: 10 - 20
minutes)
When self-correction can not done, all LED will indicate triple fl ash for
eight times and the operation will stop. Check and correct following
points.
• Check all pipings are connected.
• Check the stop valves are open.
After correction, repeat the wire check again. If error is still detected,
or other types of LED signal should be indicated, please contact
a service technician. (Refer to wiring diagram attached inside the
outdoor unit for self diagnosis signal.)
Note:
• For two and three indoor units, the LED for the indoor unit which is not
connected will keep lighting.
• Wire check may not be performed when the outdoor temperature is below
41 °F (5°C).
IM_A3AEX4M3PU(B434)_EN+FR+ES.indb EN-4
IM_A3AEX4M3PU(B434)_EN+FR+ES.indb EN-4
Indoor unit A
L1 L2 2
L1 L2 2
A
208/230 V, single-phase
187-253 V
35 A
23 A
) and correct them.
A
L1 L2 2
B
L1 L2
2
Earth wire
Cable holder
A
B
Connecting cable
Indoor unit B
Indoor unit C
L1 L2 2
L1 L2 2
L1 L2 2
L1 L2 2
B
C
Outdoor unit
• Fit a disconnect switch, having a contact separation of at least
0.12 inch (3 mm) in all poles, to the electricity power line.
EN-4
C
L1 L2 2
Earth wire
D
L1 L2
2
L1L2
0.2 inch
(5 mm)
C
D
Power supply cable
Indoor unit D
Disconnect switch
L1 L2 2
Power supply
208/230V 60Hz
Ground
L1 L2 2
L1 L2
D
SELECT
DSW1
LED1A
1
2
OFF
ON
LED1B
PUMP DOWN
SW1
LED1C
WIRE CHECK
LED1D
SW2
WIRE CHECK button (SW2)
2/7/13 11:05:30 AM
2/7/13 11:05:30 AM
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