Panasonic CS-XE18HKD / CS-XE24HKD / CU-XE18HKD / CU-XE24HKD Service Manual ▷ View online
37
11.4.4.
CONNECT THE CABLE TO THE OUTDOOR UNIT
(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)
1. Remove the control board cover from the unit by
loosening the screw.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 4 x 1.5 mm
2
flexible cord, type designation 245 IEC 57 or heavier
cord.
cord.
3. Secure the cable onto the control board with the holder
(clamper).
4. Cable connection to the power supply through knife
switch (Disconnecting means).
• Connect the approved polychloroprene sheathed power
supply cable (3 x 2.5 mm
2
) XE18HKD, (3 x 4.0 mm
2
)
XE24HKD type designation 245 IEC 57 or heavier cord
to the terminal board, and connect the other end of the
cable to knife switch (Disconnecting means).
to the terminal board, and connect the other end of the
cable to knife switch (Disconnecting means).
5. Select required direction and apply protective bushing
provided in accessories to protect cables from sharp
edges.
edges.
6. Once all wiring work has been completed, tie the wires
and cord together with the binding strap so that they do
not touch other parts such as the compressor and pipes.
not touch other parts such as the compressor and pipes.
Note: Knife switch (Disconnecting means) should have
minimum 3.5 mm contact gap.
minimum 3.5 mm contact gap.
• Secure the cable onto the control board with the holder
(clamper).
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12 Operation and Control
12.1. Basic Function
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
12.1.1.
Internal Setting Temperature
Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
12.1.2.
Cooling Operation
12.1.2.1. Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5
qC.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
12.1.3.
Soft Dry Operation
12.1.3.1. Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5
qC.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
12.1.4.
Heating Operation
12.1.4.1. Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0
qC.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF
point.
39
12.1.5.
Automatic Operation
• This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control
operation mode, indoor intake air temperature and outdoor air temperature.
• During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to
detect the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.
Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature, the value of T1 will
increase up to 10
increase up to 10
qC, T2 will decreased by 3qC and T3 will decreased up to 8qC.
The Auto Operation Mode shifting will take place whenever operation mode changed from Cooling/Soft Dry to Heating or vice
versa.
versa.
12.2. Indoor Fan Motor Operation
A. Basic Rotation Speed (rpm)
i. Manual Fan Speed
[Cooling, Dry]
i. Manual Fan Speed
[Cooling, Dry]
• Fan motor’s number of rotation is determined according to remote control setting.
[Heating]
• Fan motor’s number of rotation is determined according to remote control setting.
ii. Auto Fan Speed
[Cooling, Dry]
[Cooling, Dry]
• According to room temperature and setting temperature, indoor fan speed is determined automatically.
• The indoor fan will operate according to pattern below.
• The indoor fan will operate according to pattern below.
Remote Control
O
O
O
O
O
Tab (rpm)
Hi
Me+
Me
Me-
Lo
Remote Control
O
O
O
O
O
Tab (rpm)
Shi
Me+
Me
Me-
Lo
40
[Heating]
• According to indoor pipe temperature, automatic heating fan speed is determined as follows.
B. Feedback control
• Immediately after the fan motor started, feedback control is performed once every second.
• During fan motor on, if fan motor feedback 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter
increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan motor error is detected.
Operation stops and cannot on back.
Operation stops and cannot on back.
12.3.
Outdoor Fan Motor Operation
Outdoor fan motor is operated with one fan speed only. It starts when compressor starts operation and it stops 30 seconds after
compressor stops operation.
compressor stops operation.
12.4. Airflow Direction
1. There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes).
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger
temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).
12.4.1.
Vertical Airflow
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1
below. When the air conditioner is stopped using remote control, the vane will shift to close position.
below. When the air conditioner is stopped using remote control, the vane will shift to close position.
2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions
of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close
position.
position.
Operation Mode
Airflow Direction
Vane Angle (
q)
1
2
3
4
5
Heating
Auto with Heat Exchanger
Temperature
Temperature
A
0
B
45
C
0
D
0
Manual
12
25
37
49
60
Cooling and e-ion
Auto
10 ~ 32
Manual
12
18
25
31
37
Soft Dry
Auto
10 ~ 32
Manual
12
18
25
31
37
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