13
GB
D
F
I
NL
E
P
GR
RU
TR
•
Remote controller cable length:
r
1
,
r
2
=
10 m (0.3 to 1.25 mm
2
)
If the length exceeds 10 m, use 1.25 mm
2
shielded cable and calculate the length of that portion (L
4
and L
7
) as within the total extended
length and the longest remote length.
9.4. Wiring of main power supply and equipment capacity
Schematic Drawing of Wiring (Example)
[Fig. 9.4.1]
(P.5)
A
Switch (Breakers for Wiring and Current Leakage)
B
Outdoor Unit
C
BC Controller (master)
C
' BC Controller (slave)
D
Pull Box
E
Indoor Unit
Thickness of Wire for Main Power Supply and On/Off Capacities
1. Use a separate power supply for the outdoor unit and indoor unit.
2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker with consideration of voltage drops.
Make sure the power-supply voltage does not drop more than 10 %.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 245 IEC57).
6. A switch with at least 3 mm contact separation in each pole shall be provided by the Air conditioner installation.
Warning:
•
Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly, it may cause
heating or fire.
•
Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
Caution:
•
Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric shock.
•
Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a malfunction
of unit or fire.
10. Test run
10.1. The following phenomena do not represent trouble (emergency)
Display of remote controller
Normal display
“Cooling (heating)” flashes
Normal display
Normal display
Defrost display
No lighting
Heat ready
Normal display
“HO” flashes
Light out
Cause
This is not a trouble as it is just a selecting sound.
When multiple indoor units (max. 3) are connected to the same branch of the BC
controller, the heating (cooling) operation cannot be performed while another
indoor unit is performing a cooling (heating) operation.
Because of the control operation of auto vane, it may change over to horizontal
blow automatically from the downward blow in cooling in case the downward
blow operation has been continued for 1 hour. At defrosting in heating, hot adjust-
ing and thermostat OFF, it automatically changes over to horizontal blow.
Ultra-low speed operation is commenced at thermostat OFF.
Light air automatically changes over to set value by time or piping temperature at
thermostat ON.
The fan is to stop during defrosting.
Fan is to run for 1 minute after stopping to exhaust residual heat (only in heating).
Ultra low-speed operation for 5 minutes after SW ON or until piping temperature
becomes 35
°
C, low speed operation for 2 minutes thereafter, and then set notch
is commenced. (Hot adjust control)
When power to the outdoor unit is turned on and the refrigerant is resting, warm-
ing up operation is performed for at least 35 minutes to warm the compressor.
During this time, only the fan operates.
The system is initializing.
Operate remote controller again after “HO” disappear.
After a stop of cooling operation, unit continues to operate drain pump for three
minutes and then stops it.
Unit continues to operate drain pump if drainage is generated, even during a
stop.
Phenomenon
Indoor unit and BC controller generate sound
at the cooling/heating change over sometime.
Indoor unit does not the perform cooling (heat-
ing) operation.
The auto vane runs freely.
Fan setting changes during heating.
Fan stops during heating operation.
Fan does not stop while operation has been
stopped.
No setting of fan while start SW has been
turned on.
Outdoor unit does not operate by turning
switch on.
Indoor unit remote controller shows “HO” in-
dicator for about two minutes when turning
ON universal power supply.
Drain pump does not stop while unit has been
stopped.
Drain pump continues to operate while unit
has been stopped.
75A 100mA 0.1sec. or less
75A 100mA 0.1sec. or less
20A 30mA 0.1sec. or less
30A 30mA 0.1sec. or less
40A 30mA 0.1sec. or less
Breaker for Current Leakage
Model
Outdoor
Unit
P400
P500
Main cable
Switch (A)
Minimum wire thickness (mm
2
)
Branch
Capacity
Fuse
Breaker for
wiring (NFB)
Ground
75A
75A
20A
30A
40A
63
63
16
25
32
63
63
16
25
32
10.0
16.0
1.5
1.5
4.0
10.0
16.0
1.5
2.5
4.0
–
–
1.5
1.5
4.0
Total operating current of
the indoor units and BC
controller
16 A or less
25 A or less
32 A or less
