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Conduit
Connector
Expansion
(Commercially
available)
Valve Angle
less than 3/8 in.
(10mm)
Lock nut
(Commercially
available)
Hook
Insert the cable into Cable Holder
IMPORTANT:
• Improper cabling may damage the internal control circuit.
Make sure to match the markings of the indoor and
outdoor terminal boards when connecting cables.
• Make sure to insert the cable leads deep into the terminal
board and tighten up the screws. Poor contact can cause
overheating, spark, and/or malfunction.
• Make 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
Operating voltage Range
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) on the display board are
blinking simultaneously.
If one or more of the LED is / are kept lit, check for mismatching
terminal markings (
, L1, L2, 2) and correct them.
(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 blink, and three BEEP will
be emitted.
• All LED will blink rapidly.
(4) When wire check is completed normally, all LED will blink
simultaneously and the operation will stop. (Wire check time: 5-10
minutes)
(5) When self-correction can not done, all LED will indicate triple blink 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.)
Wire Conduit
(Commercially
available)
Fig.3
Fig.5
Disconnect
208 / 230 V, single-phase
187 - 253 V
25 A
17 A
12.5 in. (318mm)
15 in. (380mm)
UNIT A
UNIT B
Indoor unit A
Indoor unit B Indoor unit C
switch
A
• Fit a disconnect switch, having a contact separation
of at least 0.12 in. (3 mm) in all poles, to the electricity
power line.
Note:
• Wire check may not be performed
when the outdoor temperature is
below 41 °F (5°C).
EN-4
Power supply Cable
Connection Cable
Fig.4
UNIT C
Power
supply
Fig.6
Power Supply
208/230V 60Hz
B
C
Outdoor unit
PUMP DOWN button
WIRE CHECK button
Ground
(SW1)
(SW2)
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