Panasonic CU-4E27PBD / CU-5E34PBD Service Manual ▷ View online
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10.5 Connect The Cable To The Outdoor Unit
1. Remove the particular plate from the unit by
loosening two screws.
2. Cable connection to the power supply through
isolating Devices (Disconnecting means).
o
Connect approved type polychloroprene
sheathed power supply cord
CU-4E27***(3 x 2.5 mm²), CU-5E34***
(3 x 4.0 mm²) 245 IEC 57 type
designation or heavier cord to the
terminal board, and connect the others
end of the cord to Isolating Devices
(Disconnecting means).
sheathed power supply cord
CU-4E27***(3 x 2.5 mm²), CU-5E34***
(3 x 4.0 mm²) 245 IEC 57 type
designation or heavier cord to the
terminal board, and connect the others
end of the cord to Isolating Devices
(Disconnecting means).
3. Connection cable between indoor unit and
outdoor unit shall be approved
polychloroprene sheathed 4 x 1.5 mm
polychloroprene sheathed 4 x 1.5 mm
2
flexible
cord, type designation 245 IEC 57 or heavier
cord. Allowable connection cable length of
each indoor unit shall be 30 m or less.
cord. Allowable connection cable length of
each indoor unit shall be 30 m or less.
4. Connect the power supply cord and
connection cable between indoor unit and
outdoor unit according to the diagram as
shown.
outdoor unit according to the diagram as
shown.
Remarks:
It is the responsibility of the installer or user of the equipment to ensure, by consultation with the suitable
distribution/supply network operator if necessary, that the equipment should be connected only to a supply with,
Short-circuit
It is the responsibility of the installer or user of the equipment to ensure, by consultation with the suitable
distribution/supply network operator if necessary, that the equipment should be connected only to a supply with,
Short-circuit
power
Ssc
1150kW
Service
current
capacity
100A per phase
The equipment complies with IEC/EN 61000-3-11 and IEC/EN 61000-3-12. Please liaise with supply authority to
ensure that the above items at the interface point are sufficient for the installation of the equipment.
ensure that the above items at the interface point are sufficient for the installation of the equipment.
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5. For wire stripping and connection requirement, refer to the diagram below.
6. Secure the power supply cord and connecting cables onto the control board with the holder.
7. Attach the control board cover back to the original position with screw.
6. Secure the power supply cord and connecting cables onto the control board with the holder.
7. Attach the control board cover back to the original position with screw.
10.6 Heat Insulation
Use a material with good heat-resistant properties as the heat insulation for the
pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are
not adequately insulated, condensation or water leakages may occur.
pipes. Be sure to insulate both the gas-side and liquid-side pipes. If the pipes are
not adequately insulated, condensation or water leakages may occur.
Liquid-side pipes Material shall
withstand
120°C or higher
120°C or higher
Gas-side pipes
10.7 Disposal Of Outdoor Unit Drain Water
If a drain elbow is used, the unit should be placed on a stand which is taller than 5 cm.
If the unit is used in an area where temperature falls below 0°C for 2 or 3 days in succession, it is recommended
not to use a drain elbow, for the drain water freezes and the fan will not rotate.
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11. Operation
Control
11.1 Cooling Operation
11.1.1 Outdoor fan control
When cooling operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below:
11.1.2 Annual Cooling control
This control is to enable cooling operation when outdoor ambient temperature is low.
Control start conditions:
o
Cooling operation is activated with compressor ON.
o
Outdoor ambient temperature is less than 15°C.
Control
contents:
o
When the above conditions are fulfilled, based on outdoor pipe temperature, the outdoor fan motor will
operate according to figure below:
To improve the judgment accuracy during annual cooling control, outdoor ambient temperature sampling for
2 minutes will be activated every 35 minutes under designated fan speed.
Control
stop
conditions:
o
When either one of the start conditions are not complied.
11.1.3 Cooling
Powerful Operation 1
During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabled
indoor unit by temporary stop the capability supply to low load demand indoor units.
Operation start condition:
o
Powerful operation ON for targeted indoor unit
Operation
content:
o
If other indoor units (where Powerful operation are OFF) achieve setting temperature continuously for
1 minute after received powerful command from indoor unit, then capability supply to other indoor units are
stopped for minimum 3 minutes.
Capability supply stop period follows powerful operation period.
stopped for minimum 3 minutes.
Capability supply stop period follows powerful operation period.
Operation stops when comply either one of the following conditions:
o
When other indoor units (where Powerful operation are OFF) is demand for capacity.
o
When the powerful operation is OFF for all indoor units.
o
When Quiet operation received from 1 indoor unit.
o
When protection control starts.
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11.2 Heating Operation
11.2.1 Outdoor fan control
When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted
according to figure below for Heating overload control:
11.2.2 Heating Room Temp Sampling Control
To improve the judgment accuracy, indoor room temperature sampling starts when any indoor unit has stopped
capability supplied (heating thermo-off) during heating operation with compressor ON, outdoor unit will send
signal to all thermo-off indoor units to ON fan motor and get room temperature sample.
signal to all thermo-off indoor units to ON fan motor and get room temperature sample.
To prevent discharge temperature drop at indoor units which is ON when sampling the room temperature of
heating thermo-off units, the compressor frequency is increased accordingly.
However, if indoor room temperature is much higher compare to remote control setting temperature, before
thermo-off, sampling of corresponding indoor unit will be cancelled.
11.2.3 Powerful Operation 2
During cooling / heating operation, this control is to provide fast cooling / heating operation compare to normal
operation.
Operation start if all condition below are complied:
o
Powerful operation ON for indoor unit.
o
Not under Annual Cooling control.
Operation
content:
o
Outdoor fan speed will adjust automatically.
o
Compressor
frequency
will adjust automatically.
Operation stop when comply either one of the follow conditions:
o
When the powerful operation is OFF for all indoor units.
o
When annual cooling control activated.
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