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11.4. Wiring of main power supply and equipment capacity
Schematic Drawing of Wiring (Example)
[Fig. 11.4.1] (P.13)
A Switch (Breakers for wiring and current leakage)
D Pull box
Thickness of wire for main power supply, capacities of the switch and system impedance
Model
PQHY-P72THMU-A
Heat source unit
PQHY-P96THMU-A
[PQHY-P·THMU-A]
PQHY-P120THMU-A
PQHY-P72YHMU-A
Heat source unit
PQHY-P96YHMU-A
[PQHY-P·YHMU-A]
PQHY-P120YHMU-A
PQRY-P72THMU-A
Heat source unit
PQRY-P96THMU-A
[PQRY-P·THMU-A]
PQRY-P120THMU-A
PQRY-P72YHMU-A
Heat source unit
PQRY-P96YHMU-A
[PQRY-P·YHMU-A]
PQRY-P120YHMU-A
Indoor unit
1. Use dedicated power supplies for the heat source unit and indoor unit. Ensure OC and OS are wired individually.
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. If the voltage drops, use a wire that is one rank thicker in diameter.
Make sure the power-supply voltage does not drop more than 10%.
4. Speci¿ c wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for heat source use shall not be lighter than polychloroprene sheathed À exible cord (design 245 IEC57).
6. A switch with at least 3 mm contact separation in each pole shall be provided by the Air Conditioner installer.
Warning:
•
Be sure to use speci¿ ed wires for connections and ensure no external force is imparted to terminal connections. If connections are not ¿ xed ¿ rmly,
heating or ¿ re may result.
•
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 sites may require attachment of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of
electric shock.
•
Do not use anything other than a breaker and fuse with the correct capacity. Using a fuse or wire of too large capacity may cause malfunction or ¿ re.
12. Test run
12.1. The following phenomena do not represent faults.
Phenomenon
Indoor unit does not perform cooling
(heating) operation.
The auto vane rotates and begins to blow air
horizontally.
Fan setting changes during heating.
Fan does not stop while operation has been
stopped.
No setting of fan while start SW has been
turned on.
Indoor unit remote controller shows "H0"
or "PLEASE WAIT" indicator for about ¿ ve
minutes when turning ON universal power
supply.
Drain pump does not stop when unit is
stopped.
Drain pump continues to operate while unit
has been stopped.
Indoor unit emits noise when switching from
heating to cooling and vice versa.
Immediately after startup, the indoor unit
emits the sound of the refrigerant À ow.
Warm air comes from an indoor unit that is
not performing a heating operation.
B Breakers for current leakage
E Indoor unit
Minimum wire thickness
Unit
2
(mm
[AWG])
combination
Main cable
Branch
Ground
-
12.0 [3.3]
-
12.0 [3.3]
-
10.0 [5.3]
-
10.0 [5.3]
-
8.0 [8.4]
-
8.0 [8.4]
-
14.0 [2.1]
-
14.0 [2.1]
-
14.0 [2.1]
-
14.0 [2.1]
-
12.0 [3.3]
-
12.0 [3.3]
-
12.0 [3.3]
-
12.0 [3.3]
-
10.0 [5.3]
-
10.0 [5.3]
-
8.0 [8.4]
-
8.0 [8.4]
-
14.0 [2.1]
-
14.0 [2.1]
-
14.0 [2.1]
-
14.0 [2.1]
-
12.0 [3.3]
-
12.0 [3.3]
0.41 [22]
0.41 [22]
0.41 [22]
Display of remote controller
"Cooling (heating)" À ashes
Normal display
Normal display
No lighting
Heat ready
"H0" or "PLEASE WAIT" À ashes
Light out
Normal display
Normal display
Normal display
C Heat source unit
F BC controller (standard or main)
F' BC controller (sub)
Breker
Switch (A)
for wiring
Breaker for current leakage
Capacity
Fuse
(NFB) (A)
20.0
25.0
20.0
20A 30mA or 100mA 0.1sec. or less
30.0
30.0
30.0
30A 30mA or 100mA 0.1sec. or less
40.0
50.0
40.0
40A 100mA 0.1sec. or less
15.0
15.0
15.0
15A 30mA or 100mA 0.1sec. or less
15.0
15.0
15.0
15A 30mA or 100mA 0.1sec. or less
20.0
20.0
20.0
20A 30mA or 100mA 0.1sec. or less
20.0
25.0
20.0
20A 30mA or 100mA 0.1sec. or less
30.0
40.0
30.0
30A 30mA or 100mA 0.1sec. or less
40.0
50.0
40.0
40A 100mA 0.1sec. or less
15.0
15.0
15.0
15A 30mA or 100mA 0.1sec. or less
15.0
15.0
15.0
15A 30mA or 100mA 0.1sec. or less
20.0
20.0
20.0
20A 30mA or 100mA 0.1sec. or less
15.0
15.0
15.0
20A 30mA or 100mA 0.1sec. or less
Cause
When another indoor unit is performing the heating (cooling) operation, the
cooling (heating) operation is not performed.
If air has been blowing downward for 1 hour during cooling, the unit may
automatically change to horizontal blowing with the control operation of the
auto vane. During defrosting or immediately after heating start-up/shut-down,
the auto vane automatically rotates to blow air horizontally for a short period
of time.
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 set 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).
The system is being started up.
Operate remote controller again after "H0" or "PLEASE WAIT" disappears.
After cooling operation stops, the unit continues to operate drain pump for
three minutes and then stops it.
Unit continues to operate drain pump if drainage is generated, even after the
unit has been stopped.
This is a switching sound of the refrigerant circuit and does not imply a
problem.
Unstable À ow of the refrigerant emits a sound. This is temporary and does not
imply a problem.
The LEV is slightly open to prevent refrigerant, of the indoor unit that is not
performing the heating operation, from being lique¿ ed. This does not imply a
problem.
Maximum
Currennt
(A)
18.8
26.9
35.4
8.5
12.1
16.0
19.3
27.6
36.4
8.8
12.5
16.5
-
27
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