Panasonic Cs A18ekh Cs A24ekh Cu A18ekh Cu A24ekh Repair Manual

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10 Installation Instruction
INDOOR UNIT
• There should not be any heat source or steam near the unit.
• There should not be any obstacles blocking the air
circulation.
• A place where air circulation in the room is good.
• A place where drainage can be easily done.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling,
fence or other obstacles.
• Recommended installation height for...

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10.1. Indoor Unit
10.1.1. HOW TO FIX INSTALLATION PLATE
The mounting wall is strong and solid enough to prevent it from
the vibration.
The centre of installation plate should be at more than 550 mm
at right and left of the wall.
The distance from installation plate edge to ceiling should more
than 67 mm.
From installation plate left edge to unit’s left side is 47 mm.
From installation plate right edge to unit’s right is 73 mm.
B: For left side piping, piping connection for liquid should
be about 126...

23 3.For the embedded piping
(This can be used for left rear piping and left bottom piping also.) 

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10.1.4. CONNECT THE CABLE TO THE INDOOR UNIT
1. The inside and outside connecting cable can be
connected without removing the front grille.
2. Connecting cable between indoor unit and outdoor unit
shall be approved polychloroprene sheathed 3 × 2.5 mm
2
(C18EK, C24EK, RS/RU-C18/24EK) or 5 × 2.5 mm2
(A18EK, A24EK) flexible cord, type designation 245 IEC
57 or heavier cord.
• Ensure the colour of wires of outdoor unit and the
terminal Nos. are the same to the indoor’s respectively.
• Earth lead wire...

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10.2. Outdoor Unit
10.2.1. INSTALL THE OUTDOOR UNIT
• After selecting the best location, start installation according
to Indoor/Outdoor Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame firmly and
horizontally by bolt nut (ø10 mm).
2. When installing at roof, please consider strong wind and
earthquake. Please fasten the installation stand firmly
with bolt or nails.
10.2.2. CONNECTING THE PIPING
Connecting The Piping To Indoor Unit
Please make flare after inserting flare nut (locate...

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1) Measure the pressure.
2) Keep it for 5-10 minutes
•Ensure if the pressure indicated on the gauge is as same as that of measured at first time.
2) Air purging
The air remaining in the Refrigeration cycle which contains
moisture may cause malfunction on the Compressor.
1. To purge the air, push the pin on the Gas side 3-way
valve for three seconds with a Hexagonal wrench and set
it free for one minute.
• Repeat this for three times.
2. To balance the refrigerant, close the low pressure side
valve on...

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11 Operation and Control
11.1. Heating Operation
• Heating operation can be set using remote control.
• This operation is applied to warm the room temperature reaches the setting temperature set on the remote control.
• The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to
30°C.
• During heating operation, the compressor will stop running and restart as shown in below figure.
11.1.1. Heating Operation Time Diagram 

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11.2. Cooling Operation
• Cooling operation can be set using remote control.
• This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control.
• The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C to
30°C.
• During cooling operation, the compressor will stop running and restart as shown in below figure.
11.2.1. Cooling Operation Time Diagram 

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11.3. Soft Dry Operation
• Soft Dry operation can be set using remote control.
• Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room.
• This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
• When operation begins, Soft Dry will be switched “ON” for a maximum 10 minutes, then Soft Dry operation will be turned “OFF”
for a minimum 6 minutes. After that, the Soft Dry operation will be “ON” and “OFF” based on...

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11.4. Automatic Operation
• Automatic operation can be set using remote control.
• This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature.
• After judged the temperature, the operation mode is determined by referring to the below standard.
• Then, the unit start to operate at determined operation mode, until it is switched off using remote control, with the setting
temperature as shown in below table.
• Operation mode will be determine again...