Panasonic CS-F24DTE5 User manual

1 Service Information 3
1.1. Example of trouble at test operation 3
1.2. Caution of test operation 3
1.3. Caution during automatic address setting 3
1.4. Operation range 4
2 Features 5
2.1. New design 5
2.2. Such quietness! 5
2.3. Easy installation 6
© 2004 Panasonic HA Air-Conditioning (M) Sdn Bhd
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-F24DTE5 CU-L24DBE5
CS-F28DTE5 CU-L28DBE5
2.4. Piping 6
2.5. Easy maintenance 6
2.6. Auto fan mode (indoor unit) 6
2.7. Low-noise outdoor units 7
2.8. Improved workability 8
2.9. A brand-new control method 9
2.10. Wired Remote Control 10
2.11. Wireless Remote Control 10
2.12. Group Control Equipment 11
Air Conditioner
CONTENTS
Page Page
Order No. MAC0412075C2

3 Specification 12
3.1. Product Specification 12
4 Dimensions 14
4.1. CS-F24DTE5 CS-F28DTE5 14
4.2. CU-L24DBE5 CU-L28DBE5 15
5 Refrigeration Cycle 16
6 Block Diagram 17
6.1. CS-F24DTE5 CS-F28DTE5 17
6.2. CU-L24DBE5 CU-L28DBE5 18
7 Wiring Diagram 19
7.1. CS-F24DTE5 CS-F28DTE5 19
7.2. CU-L24DBE5 CU-L28DBE5 20
8 Operation Details 21
8.1. Wired Remote Control (Optional part) 21
8.2. Wireless Remote Control (Optional part) 22
9 OPERATION CONTROL 23
9.1. Operation Mode 23
9.2. Compressor Start Control 23
9.3. Cooling Operation 23
9.4. Heating Mode Operation 26
9.5. Louver Control 29
9.6. Odour Removing Operation 31
9.7. Energy Save Operation 32
9.8. Outdoor Fan Remaining Heat Removal Control 32
9.9. Crank Case Heater Control 32
9.10. Valve Error 32
9.11. Pump Down Operation 33
9.12. Indoor Air Volume Up Control (DC Fan Motor Type Only)
33
10 Installation Instruction 34
10.1. Pipe length 34
10.2. Refrigerant additional charge 35
10.3. Position of the centre gravity 35
10.4. Indoor unit installation 36
10.5. Outdoor unit installation 45
10.6. Wired remote control installation 56
10.7. Wireless remote control installation manual 63
10.8. Twin and triple 70
11 Installation and Servicing Air Conditioner Using R410A 71
11.1. Outline 71
11.2. Tools for installing/servicing refrigerant piping 72
11.3. Refrigerant piping work 76
11.4. Installation, transferring, servicing 78
12 Troubleshooting Guide 82
12.1. Self-diagnosis error code table 82
13 Replacement Parts 84
13.1. Indoor unit 84
13.2. Outdoor unit 88
14 Electronic Circuit Diagram 92
14.1. Indoor unit 92
14.2. Outdoor unit 96
14.3. Wired remote control 103
14.4. Wireless remote control 104
14.5. Print pattern 105
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

1 Service Information
Notice of Address setting for NEW Ceiling / NEW Outdoor Unit.
The new Ceiling / New Outdoor models are possible to have address setting for twin / triple control or group control by
automatic when main power supply is switched on.
(Manual address setting is also possible by using Dip switch on Indoor unit P.C. board.) However, this address setting is only
possible when made proper wiring connection and also Indoor unit should be original virgin unit.
1.1. Example of trouble at test operation
If found out as following phenomenon at test operation on site, it may have possibility of wrong address setting.
Therefore, please ensure of the address setting.
1. LCD display of wired remote control had not illuminate although the main power supply switch is ‘on’.
2. LCD display had indicated as normal illumination when power supply switch is ‘on’, however outdoor unit cannot be operated.
(But, it is necessary to take 3 to 5 minutes for outdoor unit to start from the timing of remote control ON/OFF switch is ‘on’.)
3. P.C. board had memorized wrong setting information.
a. If main power supply is switched ‘on’ with the wrong connection.
b. When changing the connection or combination of units due to re-installation etc.
• • •
• When changing the system from twin to triple (triple to twin).
• • •
• When changing the system from group control to normal one to one system.
• • •
• When making the replacement of units as master and slave etc.
1.2. Caution of test operation
Do not touch the remote control switch and do not change any wirings for one minute when the main power supply switch is ‘on’.
(Because the unit is having automatic address setting during the first one minute.)
1.3. Caution during automatic address setting
When main power supply switch is ‘on’, the P.C. board will automatically memorized the connecting system.
Consequently, when initial power supply is ‘on’, there will not be interchangeability of units even of the same type and same
capacity unit. Therefore unable to connect the unit to another system.
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

1.4. Operation range
1.4.1. Power Supply
The applicable voltage range for each unit is given in the following table. The working voltage among the three phases must be
balanced within a 3% deviation from each voltage at the compressor terminals. The starting voltage must be higher than 85% of
the rated voltage.
MODEL Unit Main Power Applicable Voltage
CU- Phase, Volts Hz Max Min
L24DBE5 1~240 50 264 216
L28DBE5 1~220 50 242 198
1~230 50 253 207
1.4.2. Indoor and Outdoor Temperature
• • •
• Model 50Hz CU-L24DBE5, CU-L28DBE5
Operating Hz Indoor Temp. (D.B./W.B.) (°C) Outdoor Temp. (D.B./W.B.) (°C)
Max Min Max Min
Cooling 50 32/23 21/15 43/- -15/-
Heating 50 27/- 16/- 24/18 -20/-
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

2.1. New design
2.1.1. Gentle curved styling
• • •
• The base has gentle curves which express a functional
beauty. It spreads the air quietly over a wide area.
2.2. Such quietness!
2.2.1. Several new mechanism add up to
low 43 dB noise (L24BT - High Fan
Speed)
1. Delta throat fan
A delta throat (projection) has been attached to the fan
outlet to suppress the generation of vortexes. This helps
maintain air flow sped even at lower fan speeds and is
effective in reducing noise.
2. Reflux orifice
The orifice at the intake port is equipped with an air flow
guide which minimizes the flow disturbances which occur at
the orifice and inside the impeller.
This reduces pressure losses inside the casing and also
helps reduce noise.
3. Adoption of wing-shaped vanes
• • •
• The vanes of the fan have been changed to
“aerodynamic” shaped vanes, so that the air flow more
smoothly over the vane surfaces and noise is thus
suppressed.
• • •
• Side filters have been adopted in the pipe partitions.
These allow the air intake space to be increased and
also further reduce noise.
2.2.2. Automatic swinging louvre
• • •
• The horizontal air flow angle is a wide 100 degrees
(manual). The louvre can swing automatically (through 70
degrees vertically) using the remote control. This increases
the area of comfortable air flow and warms the air even to
floor level.
2.2.3. Newly-shaped louvre
• • •
• The newly-shaped louvre and air outlet effectively distribute
the air flow. During cooling, this stops warm air from
collecting near the louvre, and prevents freezing.
2 Features
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

2.3. Easy installation
2.3.1. Easy suspension
• • •
• A suspension bolt fixing bracket with 4-point support is
attached to the main unit, which increases the space
available for installation.
2.3.2. Two installation methods :
standard and wall
• • •
• In addition to the standard (1) ceiling installation, a wall (2)
installation method (using a wall-hanging bracket) is
available for cases where the ceiling is too high for the main
unit to be suspended.
2.4. Piping
2.4.1. 3-direction pipe lead-out
• • •
• The refrigerant piping can lead out in one of three directions
(right, rear-right and top-right), and the drain pipe direction
can be selected from four directions (right, rear-right, left
and rear-left).
2.5. Easy maintenance
2.5.1. Long life filter (standard
equipment)
• • •
• In general office environments, cleaning (maintenance) is
not required until after approximately 2,500 hours of
operation, thus reducing maintenance work.
• • •
• For optimum comfort, it is recommended to clean the air
filter every 1-1/2 months.
2.5.2. Maintenance is possible from
underneath the unit.
• • •
• If the bottom panel is detached, the drain pan can then be
removed and installed from underneath the unit, and
inspection and servicing of component such as the control
panel also becomes easier.
2.6. Auto fan mode (indoor unit)
• • •
• Auto fan mode is added besides high, medium and low. It
automatically adjusts the fan speed according to the indoor
unit’s temperature.
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

[Product features]
2.7. Low-noise outdoor units
2.7.1. Low-noise design improves in surrounding areas
1. The noise-suppressing winglet fan is a result of new research into vane design theory. The unique curved shape suppresses
the generation of vortexes, thus reduces air flow noise.
2. The adoption of double-orifice rings reduces air passage resistance.
3. Strengthening of the noise insulation materials in the compressor and the sealing-in of mechanical noise allows vibration noise
to be greatly enclosed and suppressed.
4. The heat exchanger has an L-shaped design to allow air to flow more smoothly.
5. Noise is automatically reduced further during night time operation with lower outdoor air temperatures.
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

2.8.1. Pipes that are one size larger can
also be connected for renewal
• • •
• If renewing the system, existing refrigerant pipes can be
utilized so that only the indoor units need to be replaced.
• • •
• For example, liquid and gas pipes from 10 years ago can be
connected to current pipes with the same size for one size
larger. Effective utilization of materials reduces working
time and trouble. (Adaptor sockets are not supplied.)
2.8.3. Drain water dripping-prevention
structure
• • •
• The base of the outdoor unit is provided with a single drain
hole in order to prevent drain water from leaking out of the
unit. Body connecting a drain elbow and a discharge pipe,
water leakages can be prevented even when the unit is
installed against a wall.
2.8. Improved workability
2.8.2. Additional refrigerant charging
• • •
• All models do not require any additional charging of refrigerant for 30m of pipe length. This makes installation much easier.
2.8.4. Space saving design allows units to be installed side by side continuously
• • •
• Servicing after installation can be carried-out by removing the front covers.
2.8.5. Easy test operation
• • •
• Test operation can be carried out for both indoor and outdoor units.
2.8.6. Long pipe design
• • •
• Maximum piping length of 50m.
2.8.7. Internal pipe connection
• • •
• Pipes are connected inside the units (inside the side covers), making the final appearance more attractive.
• • •
• Pipes can be diverted outward in any of four directions (forward, right, down, rear).
• • •
• Small liquid pipe diameters of 9.53mm, making installation work much easier.
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

2.8.8. Centralized draining method
• • •
• Even when multiple outdoor units are installed to a wall, the
drain outlets can be concentrated into a single drain pipe.
This makes installation easier and also improve
appearance.
2.9. A brand-new control method
1.
Easier power supply wiring connection
Power supply wiring and other wiring tasks can be carried out more easily.
• • •
• Twin non-polar wires used to connect indoor and outdoor units.
• • •
• Adoption of connection error prevention circuits for drive wires and signal wires. If a connection error is made, the relay does
not operate and current does not flow to the circuit boards.
2.
Twin and Triple operation
• • •
• Simultaneous air conditioning of wide spaces and corners is possible. Indoor units of different horsepowers can even be
used in combination.
• • •
• Master unit and slave-units can be set automatically in twin and triple systems. No address setting is necessary.
• • •
• Multiple indoor units can be operated simultaneously with a single remote control. Note that individual operation is not
possible.
3.
Separate indoor/outdoor unit power supplies
The power supply can be connected to (1) just the outdoor units, or (2) to both the indoor and outdoor units.
4.
Easy test operation
Test operation can be carried out for both indoor and outdoor units.
5.
Automatic setting initialization function (Remote control and Indoor unit)
In accordance with the indoor and outdoor units connected and the connection methods, conditions such as the connection
configuration (twin or triple format) and remote-control functions such as automatic louvre operation and cooling or heating
mode are automatically detected and set instantly.
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5

2.10. Wired Remote Control
1. The new design includes an easily-visible red pilot lamp. The power can be turned on and off at a single touch, without opening
the cover.
2. Has a build-in thermistor, allowing indoor temperature detection in accordance with indoor conditions by switching with main unit
thermistor.
3. Twin non-polar wires make installation work easy. (10 m cable supplied as accessory.)
2.11. Wireless Remote Control
1. New design with compact size. (Operation range within approximately 8 m.)
2. Built-in timer with OFF/ON timer setting (within 24 hours)
Wired Wireless
CZ-RD513C CZ-RL513T
NOTE: Both of the above remote control is packed separately from the indoor unit.
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CS-F24DTE5 CU-L24DBE5 / CS-F28DTE5 CU-L28DBE5