Order No. MAC0502037C2
Air Conditioner
CS-F50DB4E5 CU-L50DBE8
CONTENTS
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1 Service Information |
3 |
1.4. Operation range |
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1.1. Example of trouble at test operation |
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2 Features |
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1.2. Caution of test operation |
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2.1. Variety of excellent features |
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1.3. Caution during automatic address setting |
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2.2. Low-noise outdoor units |
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© 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd |
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(11969-T). All rights reserved. Unauthorized copying |
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and distribution is a violation of law. |
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CS-F50DB4E5 CU-L50DBE8
2.3.Improved workability
2.4.A brand-new control method
2.5.Wired Remote Control
2.6.Wireless Remote Control
2.7.Group Control Equipment
3Specification
3.1.Product Specification
4Dimensions
4.1.CS-F50DB4E5
4.2.CU-L50DBE8
5Refrigeration Cycle
6Block Diagram
6.1.CS-F50DB4E5
6.2.CU-L50DBE8
7Wiring Diagram
7.1.CS-F50DB4E5
7.2.CU-L50DBE8
8Operation Details
8.1.Wired Remote Control (Optional part)
8.2.Wireless Remote Control (Optional part)
9Operation Control
9.1.Operation Mode
9.2.Compressor Start Control
9.3.Cooling Operation
9.4.Heating Mode Operation
9.5.Louver Control
9.6.Odour Removing Operation
9.7.Energy Save Operation
9.8.Outdoor Fan Remaining Heat Removal Control
9.9.Crank Case Heater Control
9.10.Valve Error
8 |
9.11. Pump Down Operation |
32 |
9 |
9.12. Indoor Air Volume Up Control (DC Fan Motor Type Only) |
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32 |
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10 Installation Instruction |
33 |
11 |
10.1. Pipe length |
33 |
12 |
10.2. Refrigerant additional charge |
34 |
12 |
10.3. Position of the centre gravity |
34 |
13 |
10.4. Indoor unit installation |
35 |
13 |
10.5. Outdoor unit installation |
47 |
14 |
10.6. Wired remote control installation |
58 |
15 |
10.7. Wireless remote control installation manual |
65 |
16 |
10.8. Twin |
72 |
16 |
11 Installation and Servicing Air Conditioner Using R410A |
73 |
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11.1. Outline |
73 |
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11.2. Tools for installing/servicing refrigerant piping |
74 |
18 |
11.3. Refrigerant piping work |
78 |
19 |
11.4. Installation, transferring, servicing |
80 |
20 |
12 Troubleshooting Guide |
84 |
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12.1. Self-diagnosis error code table |
84 |
21 |
13 Servicing Information |
86 |
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13.1. Caution when servicing of fan and fan motor |
86 |
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14 Replacement Parts |
87 |
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14.1. Indoor unit |
87 |
22 |
14.2. Outdoor unit |
92 |
25 |
15 Electronic Circuit Diagram |
96 |
28 |
15.1. Indoor unit |
96 |
30 |
15.2. Outdoor unit |
100 |
31 |
15.3. Wired remote control |
105 |
31 |
15.4. Wireless remote control |
106 |
31 |
15.5. Print pattern |
107 |
31 |
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CS-F50DB4E5 CU-L50DBE8
1 Service Information
Notice of Address setting for NEW Cassette / NEW Outdoor Unit.
The new Cassette / New Outdoor models are possible to have address setting for twin 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 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-F50DB4E5 CU-L50DBE8
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 |
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Applicable Voltage |
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CU- |
Phase, Volts |
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Hz |
Max |
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Min |
L34DBE5 |
1~240 |
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50 |
264 |
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216 |
L43DBE5 |
1~220 |
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50 |
242 |
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198 |
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1~230 |
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50 |
253 |
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207 |
L50DBE8 |
3N~380 |
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50 |
418 |
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342 |
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3N~400 |
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50 |
440 |
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360 |
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3N~415 |
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50 |
457 |
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374 |
1.4.2.Indoor and Outdoor Temperature
• Model 50Hz CU-L34DBE5, CU-L43DBE5, CU-L50DBE8
Operating |
Hz |
Indoor Temp. (D.B./W.B.) (°C) |
Outdoor Temp. (D.B./W.B.) (°C) |
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Max |
Min |
Max |
Min |
Cooling |
50 |
32/23 |
21/15 |
43/- |
-15/- |
Heating |
50 |
27/- |
16/- |
24/18 |
-20/- |
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CS-F50DB4E5 CU-L50DBE8
2 Features
2.1.Variety of excellent features
2.1.1.Compact design
• The height is only 288 mm and can be installed even where the space is limited.
2.1.2. Automatic restart function
• When the electric power comes back after a power failure, the unit itself automatically restarts the operation in the pre-failure mode.
2.1.3. Auto fan mode (indoor unit)
•Auto fan mode is added besides Hi, Me and Lo.
It automatically adjusts the fan speed according to the indoor temperature.
2.1.4.Dry mode function
• Dry mode can make a comfortable indoor environment during wet season.
2.1.5. Quiet operation
• The sound level is as low as 42 dB (A) for model CS-F50DB4E5 and suitable for offices, shops, homes etc., where quiet operation is essential.
2.1.6. Auto Swing Louvre
• The air flow angle can be changed automatically (or manually) to an angle between 10° to 70° using the remote control.
2.1.7.Low ambient cooling operation
• Cooling operation is possible at outdoor temperature of -5°C.
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CS-F50DB4E5 CU-L50DBE8
2.1.8.Piping and drainage
• Built-in upward draining mechanism.
2.1.9. Automatic changeover function (heat pump models)
• The unit automatically switches between cooling and heating in accordance with operating load in order to maintain a comfortable indoor temperature.
2.1.10. Hot start system (heat pump models)
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CS-F50DB4E5 CU-L50DBE8
2.2.Low-noise outdoor units
[Product features]
2.2.1.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-F50DB4E5 CU-L50DBE8
2.3.Improved workability
2.3.1.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.)
2.3.2.Additional refrigerant charging
• All models do not require any additional charging of refrigerant for 30m of pipe length. This makes installation much easier.
2.3.3.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.
2.3.4. Space saving design allows units to be installed side by side continuously
• Servicing after installation can be carried-out by removing the front covers.
2.3.5.Easy test operation
• Test operation can be carried out for both indoor and outdoor units.
2.3.6.Long pipe design
• Maximum piping length of 50m.
2.3.7.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-F50DB4E5 CU-L50DBE8
2.3.8.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.
2.4.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 operation
•Simultaneous air conditioning of wide spaces and corners is possible. Indoor units of same horsepowers can even be used in combination.
•Master unit and slave-units can be set automatically in twin 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 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-F50DB4E5 CU-L50DBE8
2.5.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.)
2.6.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-RL513B |
NOTE: Both of the above remote control is packed separately from the indoor unit.
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CS-F50DB4E5 CU-L50DBE8
2.7.Group Control Equipment
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Group control by one remote |
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[Remote side] |
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control |
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Optional wired remote |
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All air conditioner units are |
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control CZ-RD513C |
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controlled as a whole by remote |
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control. |
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[Local side] |
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All indoor units operate in the |
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Not needed |
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same mode. |
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Wired |
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A maximum of 16 units can be |
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remote |
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connected together (sequental |
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control |
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starting) |
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Twin remote control separate |
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[Remote side] |
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control |
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Optional wired remote |
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Each indoor unit can be operated |
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control |
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by either one of the two remote |
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control. |
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[Local side] |
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Apart from timer setting time, |
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Optional wired remote |
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displays for two remote control are |
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control CZ-RD513C |
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identical. |
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Last button pressed has priority |
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(main or slave is set at remote |
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control unit). |
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Common |
Common control / group |
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Optional wired remote |
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Operation is possible using either |
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control and wireless |
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control |
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wired or wireless remote control |
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remote control |
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unit. |
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Wired CZ-RD513C |
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Last button pressed has priority. |
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Wireless CZ-RL513B |
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CS-F50DB4E5 CU-L50DBE8
3 Specification
3.1.Product Specification
3.1.1.CS-F50DB4E5 CU-L50DBE8
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ITEM / MODEL |
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Indoor Unit |
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Outdoor Unit |
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Main Body |
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CS-F50DB4E5 |
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CU-L50DBE8 |
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Panel |
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CZ-BT03P |
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Remote |
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CZ-RD513C (Wired) |
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Control |
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CZ-RL513B (Wireless) |
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Cooling Capacity |
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kW |
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14.0 |
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BTU/h |
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47,700 |
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Heating Capacity |
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kW |
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16.0 |
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BTU/h |
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54,600 |
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Refrigerant Charge-less |
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m |
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30 |
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Standard Air Volume for High, |
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m3/min |
Hi 32 |
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Me 29 |
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Lo 25 |
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Hi 98 |
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Medium and Low Speed |
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cfm |
1130 |
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970 |
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850 |
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3460 |
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Outside Dimension (H x W x D) |
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mm |
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288 x 840 x 840 |
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1340 x 900 x 320 |
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inch |
11-11/32 x 33-1/24 x 33-1/24 |
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52-7/8 x 35-7/16 x 12-19/32 |
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Net Weight |
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kg (lbs) |
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28.5 (63) |
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105 (231) |
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Piping |
Refrigerant |
Gas |
mm (inch) |
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O.D Ø 15.88 (5/8) Flared Type |
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Connection |
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Liquid |
mm (inch) |
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O.D Ø 9.53 (3/8) Flared Type |
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Drain |
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mm |
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O.D Ø 20 |
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I.D Ø 20 x 1 |
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Compressor |
Type, Number of Set |
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- |
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Hermetic - 2P (Rotary), 2 |
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Starting Method |
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- |
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DC-INV control |
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Motor |
Type |
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- |
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4-pole single phase brushless motor |
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Rated Output |
kW |
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- |
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3.8 |
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Fan |
Type, Number of Set |
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Turbo fan-1 |
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Propeller fan-1 |
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Motor |
Type |
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8-pole DC brushless motor |
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6-pole single phase induction motor |
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Rated Output |
kW |
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0.06 |
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0.07 x 2 |
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Air-heat Exchanger (Row x Stage x FPI) |
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Louver-fin type (2 x 12 x 21) |
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Corrugate-fin type (2 x 51 x 18) |
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Refrigerant Control |
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- |
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Exp. Value |
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Refrigerant Oil (Charged) |
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cm3 |
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- |
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FV50S (1200) |
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Refrigerant (Charged) R410A |
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kg (oz) |
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- |
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3.50 (123) |
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Running |
Control Switch |
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Wireless or Wired Remote Control |
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- |
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Adjustment |
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Room Temperature |
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Thermostat |
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Safety Devices |
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Internal protector for compressor, |
Internal thermostat for fan motor, |
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Crankcase heater, High pressure switch, Current transformer |
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Noise Level |
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dB (A) |
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Hi 47 Lo 42 |
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Cooling 54, Heating 56 |
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Power level dB |
Cooling : Hi 62 Lo 57 |
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Cooling 68, Heating 70 |
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Heating : Hi 62 Lo 57 |
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Moisture Removal |
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L/h |
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9.0 |
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EER |
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W/W |
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3.01 |
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COP |
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W/W |
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3.41 |
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1.Cooling capacities are based on indoor temperature of 27°C D.B. (80.6°F D.B.), 19.0°C W.B. (66.2°F W.B.) and outdoor air temperature of 35°C D.B. (95°F D.B.), 24°C W.B. (75.2°F W.B.)
2.Heating capacities are based on indoor temperature of 20°C D.B. (68°F D.B.) and outdoor air temperature of 7°C D.B. (44.6°F D.B.), 6°C W.B. (42.8°F W.B.)
ELECTRICAL DATA (50 Hz)
ITEM / MODEL |
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Condition by JIS-B8615 |
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Volts |
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V |
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380 |
400 |
415 |
Phase |
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3N |
3N |
3N |
Power Consumption |
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kW |
Cool |
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4.65 |
4.65 |
4.65 |
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Heat |
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4.69 |
4.69 |
4.69 |
Running Current |
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A |
Cool |
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7.30 |
7.1 |
7.0 |
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Heat |
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7.4 |
7.2 |
7.1 |
Starting Current |
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A |
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7.4 |
7.2 |
7.1 |
Power Factor |
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% |
Cool |
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97 |
95 |
92 |
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Heat |
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96 |
94 |
92 |
*Power Factor means total figure of compressor, indoor fan motor and outdoor fan motor. |
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Panasonic |
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Power source |
AC, 3N~380V, 400V, 415V 50Hz |
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CS-F50DB4E5 CU-L50DBE8
4 Dimensions
4.1.CS-F50DB4E5
13
CS-F50DB4E5 CU-L50DBE8
4.2.CU-L50DBE8
14
CS-F50DB4E5 CU-L50DBE8
5 Refrigeration Cycle
15
CS-F50DB4E5 CU-L50DBE8
6 Block Diagram
6.1.CS-F50DB4E5
16
CS-F50DB4E5 CU-L50DBE8
6.2.CU-L50DBE8
17
CS-F50DB4E5 CU-L50DBE8
7 Wiring Diagram
7.1.CS-F50DB4E5
18
CS-F50DB4E5 CU-L50DBE8
7.2.CU-L50DBE8
19
CS-F50DB4E5 CU-L50DBE8
8 Operation Details
8.1.Wired Remote Control (Optional part)
Name and function of each part
REMOTE
The OFF/ON button cannot be used.
LOCAL
All wired remote control buttons can be used.
Time/time setting display
Check display
Fan speed display
Operation mode selection display
FILTER RESET display
(Appears after the cumulative running time reaches approximately 2,500 hours of operation.)
Temperature setting display (16°C - 31°C)
Airflow direction setting display
NOTES
OFF/ON button
Used to start and stop the operation.
FAN SPEED button
Used to select the fan speed of high (HI), medium (MED), low (LO) or auto (AUTO).
MODE button
Used to select the operation of AUTO, HEAT, FAN, COOL, or DRY.
TEMP (UP/DOWN) buttons
Used to select the desired temperature.
AIR SWING (AUTO/MANUAL) buttons
Used to determined the air swing condition, either auto or manual.
FILTER RESET button
Press to reset the “FILTER RESET” display after washing the filter.
TEST RUN button*
VENTILATION button*
ECONOMY operation button
Provides Energy saving function
ODOUR WASH button
Provides deodorizing function.
CHECK button
Press this button if the check display is flashing.
TIMER/CLOCK SET buttons
Used to set the timer operation and the current time.
Operation indicator
Lights up when the unit in operation.
•Ensure that the correct button is pressed as simultaneous pressing of the multiple buttons will not make the setting correct.
•The illustration above is for explanatory purposes only. The appearance will be different during actual operation.
•Do not operate the remote control with wet hands. Otherwise, electric shock or malfunction may occur.
•Do not press the remote control buttons with sharp object as this may damage the remote control.
•Buttons marked with * are not needed for normal operation. If one of these buttons is pressed by mistake, press the same button once more to cancel the operation.
•When the power resumed after power failure, the unit will restart automatically with all the previous settings preserved by the memory function. (Auto restart function)
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CS-F50DB4E5 CU-L50DBE8
8.2.Wireless Remote Control (Optional part)
Name and function of each part
Transmitter
Transmits the remote control signal.
Airflow direction setting display
Fan speed display
Temperature setting display (16°C - 31°C)
Time/time setting display
Shows the timer operation setting time or the current time.
Address number display
Operation selection display
NOTES
OFF/ON button
Used to start and stop the operation.
ODOUR WASH button
FILTER RESET button
Press to cancel the “FILTER” indicator light on the control panel.
FAN SPEED button
Used to select the fan speed of high (HI), medium (MED), low (LO) or auto (AUTO).
SET button*
Local setting function.
ADDRESS SET button*
Used to change the address setting when using more than one indoor unit.
RESET button
Pressing this button will clear all the settings from memory. You will then need to make the settings again.
TIMER/CLOCK SET buttons
Used to set the timer operation and the current time.
AIR SWING (AUTO/MANUAL) buttons
Used to determine the air swing condition, either auto or manual.
MODE button
Used to select the operation of AUTO, HEAT, FAN, COOL or DRY.
TEMP (UP/DOWN) buttons
Used to select the desired temperature.
ECONOMY operation button
•Ensure that the correct button is pressed as simultaneous pressing of the multiple buttons will not make the setting correct.
•The illustration above is for explanatory purpose only. The appearance will be different during actual operation.
•If using the wireless remote control in conjunction with the wired remote control, the settings made from the wireless remote control will appear on the wired remote control display (except when making timer settings).
•Buttons marked with * are not needed for normal operation. If one of these buttons is pressed by mistake, press the same button once more to cancel the operation.
•When the power resumed after power failure, the unit will restart automatically with all previous settings preserved by the memory function. (Auto restart function)
21
CS-F50DB4E5 CU-L50DBE8
9 Operation Control
Description of basic control functions
9.1.Operation Mode
1.Thermostat control
2.Depend on differences between room temperature and setting temperature, Compressor running frequency will be decided and start operation.
Temperature differences become same as below table, then thermostat is off.
Temperature Differences
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Unit: °C |
Indoor type |
Cassette |
Ceiling |
Duct D2 |
Duct D3 |
Cool mode |
-1.5 |
-1.5 |
-2.0 |
-2.0 |
Dry mode |
-2.5 |
-2.5 |
-3.0 |
-3.0 |
Heat mode |
3.5 |
2.5 |
2.5 |
2.5 |
3.Select indoor temperature thermostat
When connected to wired remote controller, either indoor unit thermostat or remote controller thermostat is available, using remote control setting.
9.2.Compressor Start Control
•When the compressor start, compressor frequency will be fixed at lower level for certain time, to follow the below table, due to avoid the compressor oil discharge.
•Judging from compressor discharge temperature, decide the start condition to select either cool start control, or warm start control.
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Discharge temp. [°C] |
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>15°C |
15°C |
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Start control |
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Cool start |
Warm start |
Warm start : set 1 → |
*set 5 → |
normal control |
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Cool start : set 1 → |
set 2 → |
set 3 → set 4 → *set 5 → |
normal control |
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•Note
−Frequency at *set 5 = frequency calculated by normal control
−In case of frequency at set n excess the frequency at set 5 in cool condition, skip from set n to set 4 and transfer to set 5.
9.3.Cooling Operation
9.3.1.Cool indoor fan control
•Fan speed manual
Common control for unit using DC motor / unit using AC motor.
Operation start at hi speed, or medium speed, or low speed set by remote control.
•Fan speed auto
When operation start, or shifting to thermostat ON condition from thermostat OFF condition, odour cut operation (refer odour cut operation page for detail), after thermostat ON condition, indoor fan operate as below control.
22
CS-F50DB4E5 CU-L50DBE8
−Unit using DC motor
As follow the below figure, fan speed changing operation (program air). (rpm center B and 
is different if capacity rank is different)
−Unit using AC motor
When 1st thermostat on condition from operation start, fan speed is hi (same as manual fan speed), after 2nd thermostat on condition, fan speed change to medium speed (same as manual medium fan speed).
9.3.2.Odour cut control
• |
When cool or dry mode operation start, select odour cut mode or fan auto mode, by remote control, operation start at odour |
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wash mode when compressor start or shift to thermostat on from thermostat off. |
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• |
Odour cut operation is under below condition. |
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Operation mode |
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Cool or dry mode |
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Odour wash setting |
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Setting |
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No setting |
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Fan setting |
Auto |
Odour cut |
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Odour cut |
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Manual |
Odour cut |
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- |
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• Odour cut operation is to remove the odour generated at indoor heat exchanger to use the drain water come out from indoor heat exchanger.
Thermo & comp ON/OFF |
Thermostat ON & comp ON |
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Thermostat ON |
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Thermostat ON & comp ON |
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Time |
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40 [Sec] |
50 [Sec] |
- |
20 [Sec] |
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120 [Sec] |
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20 [Sec] |
40 [Sec] |
50 [Sec] |
- |
Cool |
Auto |
DC motor |
OFF |
SSLo |
Program air |
SSLo |
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OFF |
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SSLo |
OFF |
SSLo |
Program air |
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AC motor |
OFF |
Lo |
Hi |
Lo |
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OFF |
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Lo |
OFF |
Lo |
Me |
Dry |
Auto |
DC motor |
OFF |
SSLo |
SLo |
SSLo |
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OFF |
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SSLo |
OFF |
SSLo |
SLo |
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AC motor |
OFF |
Lo |
Lo |
Lo |
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OFF |
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Lo |
OFF |
Lo |
Lo |
9.3.3.Cool powerful operation
•When cool or dry mode operation start, temperature differences between room temperature and setting temperature is more than 5 K, setting temperature shift to 2 K down.
•(But when temperature after shifting is less than 16°C, setting temperature is 16°C = no change)
•Micro computer judge that required indoor load is bigger than calculation base from temperature differences between room temperature and setting temperature, then increase the compressor frequency compared to normal to cool down indoor side immediately.
•Those kind of operation complete after 30 minutes when cool mode operation start.
23
CS-F50DB4E5 CU-L50DBE8
9.3.4.Freezing prevention control
•During cool or dry mode operation, if indoor evaporator temperature is going down, freezing prevention control is operated.
•Detail of Freezing prevention control is as follows;
Indoor evaporator temperature area is divided into 5 zones, which consist of stop zone, down zone, no change zone, up zone, and recovery zone. When indoor evaporator temperature is going into each zone, compressor frequency change by following the below table.
Recovery zone |
Release freezing prevention operation |
Up zone |
Fan motor speed step up |
No change zone |
Operation no change |
Down zone |
Reduce the compressor frequency |
|
(check for 3 min, max 3 times) |
Stop zone |
If continue for 6 min, compressor stop |
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(for 3 min after stop, compressor can be started due to restart delay control) |
9.3.5.Dew form prevention control
•During cool or dry operation, if outdoor temperature is less than 30°C, and indoor fan speed is low or auto setting, indoor heat exchanger temperature become lower, dew form prevention control start to prevention dew form at indoor discharge grill.
•Indoor evaporator temperature area is divided into 4 zones, which consist of, down zone, no change zone, up zone, and recovery zone.
•When indoor evaporator temperature is going into each zone, change compressor frequency and louver angle by following the below table.
Recovery zone |
Release dew form prevention operation |
Up zone |
Fix the indoor louver angle |
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Cassette type : fix the manual 3rd position |
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Ceiling type : fix the manual 2nd position |
No change zone |
Continue check the indoor heat excahnger temperature |
Down zone |
Reduce the compressor frequency |
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(check for 3 min, max 3 times) |
24
CS-F50DB4E5 CU-L50DBE8
9.3.6.Drain pump control
•During cooling, dry, or defrost operation, drain pump operate by following the below table.
•When compressor start, drain pump operation start after 10 second of indoor fan starting.
•When operation stop or thermostat is off, drain pump continue operating for 6 minute to prevent the drain water from coming back.
9.3.7.Cooling low temperature protection control
•During cooling, or dry operation, if outdoor temperature is less than -15°C.
−And thermostat on condition continue for 15 min, compressor stop.
−After 3 min waiting (restart delay), if thermostat is on, compressor restart.
9.4.Heating Mode Operation
9.4.1.Heating indoor fan control
Fan speed manual
•Fan speed [Hi] [Me] [Lo] set by remote controller.
•However, when operation start, or during operation, fan speed control is limited to due to prevent a cold draft, for example, when heating operation start.
•(K10 = Indoor heat exchanger temperature, depend on indoor type)
25
CS-F50DB4E5 CU-L50DBE8
Fan speed auto
•When operation start, or during operation, fan speed control by detecting indoor heat exchanger as follows:
•(K10 = Indoor heat exchanger temperature, depend on indoor type)
9.4.2.Hot start control
•When heating operation start, hot start control carry out.
•During hot start operation, [PREHEAT] displayed at the wired remote controller.
•For wireless remote controller, [POWER LED] is blinking at the receiver of indoor unit. Indoor fan stop and louver angle fixed to upper side in spite of any setting of remote controller. When indoor heat exchanger temperature increase, or 4 minute past after operation start, hot start control finish and shift to normal fan control.
9.4.3.Heating indoor fan control at thermostat off heating mode operation
•During heating operation, if thermostat is off, indoor fan fixed low speed, Louver angle fixed upper side, even if remote control display shows any angle.
(cassette and ceiling model only)
9.4.4. Heating powerful operation
• When heating mode operation start, temperature differences between setting temperature and room temperature is more than 5 K, setting temperature increase 2 K and operation start.
(however, setting temperature after shifting is more than 31°C, setting temperature fixed 31°C.)
• Due to this control, micro computer judge indoor heat loss is big and increase compressor frequency compare to normal condition, then heat up indoor room quickly.
• This control will be finished after 60 min or thermostat is off.
9.4.5. Defrost control
•During heating operation at outdoor low temperature condition, defrost operation start timely to melt the ice formed on outdoor heat exchanger.
•When heating operation accumulated time is time up, and both outdoor temperature and outdoor unit heat exchanger temperature is less than setting temperature for 5 minute. When defrost temperature is more than setting temperature, defrost operation finish.
•During defrost operation, in spite of any change of remote controller, indoor fan stop and louver angle fixed at upper side. (for louver control : cassette and ceiling model only)
•During defrost operation, [DEFROST] is displayed at wired remote controller (when using wireless controller, POWER LED is blinking in receiver of indoor unit), hot start operate after defrost operation finish.
26
CS-F50DB4E5 CU-L50DBE8
9.4.6.Heating high temperature protection
•During heating operation, when outdoor temperature is more than 35°C for 15 minute, compressor stop to protect compressor.
•After 3 minute (re-start delat control) waiting, if thermostat on condition, outdoor unit re-start.
27
CS-F50DB4E5 CU-L50DBE8
9.5.Louver Control
9.5.1.Louver control for cassette type
•When power is on, at the same time, louver start initializing toward to close Direction.
•During operation, stopping, thermostat off condition, louver angle set manual or auto depend on remote controller setting.
−Louver manual setting
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Operation mode |
Display manual |
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Set 1 |
Set 2 |
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Set 3 |
Set 4 |
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Normal |
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20° |
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35° |
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50° |
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70° |
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Heating |
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Defrost |
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10° |
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Hot start |
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10° |
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Thermostat off |
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20° |
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Fan |
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20° |
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35° |
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50° |
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70° |
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Cooling |
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Normal |
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20° |
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35° |
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50° |
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70° |
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(fan) |
Dew control |
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50° |
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Thermostat off |
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20° |
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35° |
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50° |
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70° |
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Normal |
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30° |
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Dry |
Dew control |
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50° |
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Thermostat off |
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20° |
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35° |
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50° |
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70° |
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Operation mode judge |
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20° |
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35° |
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50° |
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70° |
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Stop mode |
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0° |
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− Louver auto setting |
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Operation |
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Display auto set |
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AUTO 1 |
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AUTO 2 |
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AUTO 3 |
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A |
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70° |
70° |
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70° |
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Normal |
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Sensor |
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B |
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20° - 70° |
20° - 50° |
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40° - 70° |
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Heating |
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C |
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20° |
20° |
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20° |
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Defrost |
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10° |
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Hot start |
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10° |
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Thermostat off |
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20° |
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Fan |
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20° - 70° |
20° - 50° |
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40° - 70° |
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Cooling |
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Normal |
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20° - 70° |
20° - 50° |
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40° - 70° |
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(Fan) |
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Dew control |
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50° |
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Thermostat off |
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20° - 70° |
20° - 50° |
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40° - 70° |
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Dry |
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Normal |
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30° |
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Dew control |
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50° |
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Thermostat off |
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20° - 70° |
20° - 50° |
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40° - 70° |
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Operation mode judge |
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20° |
20° |
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20° |
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Stop mode |
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0° |
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• Temperature range for louver control during heating operation is as follows; decide by indoor heat exchanger temperature.
AUTOBW1 |
AUTOBW2 |
AUTOBW3 |
AUTOBW4 |
60°C |
57°C |
30°C |
25°C |
28
CS-F50DB4E5 CU-L50DBE8
9.5.2.Ceiling type louver control
•When power is on, at the same time, louver initialize 2 times.
•During operation, stopping, thermostat is off condition, louver angle change as below table by manual setting or auto setting of remote controller.
Remote controller setting |
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Manual |
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Auto |
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Operation mode |
Display |
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Set 1 |
Set 2 |
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Set 3 |
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Set 4 |
Piping temp (heating) |
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A |
B |
C |
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Normal |
20° |
35° |
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50° |
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70° |
70° |
20° - 70° |
Set 1 |
Heating |
Defrost |
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20° |
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Hot start |
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20° |
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Thermostat off |
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20° |
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Fan |
20° |
35° |
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50° |
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70° |
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20° - 70° |
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Cooling |
Normal |
20° |
35° |
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50° |
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70° |
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20° - 70° |
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(fan) |
Dew control |
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35° |
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Thermostat off |
20° |
35° |
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50° |
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70° |
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20° - 70° |
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Dry |
Normal |
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35° |
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Dew control |
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35° |
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Thermostat off |
20° |
35° |
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50° |
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70° |
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20° - 70° |
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Operation mode |
judge |
20° |
35° |
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50° |
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70° |
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20° |
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Stop mode |
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70° |
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29
CS-F50DB4E5 CU-L50DBE8
9.6.Odour Removing Operation
•During stop condition, or cooling operation, when pushing the [ODOUR] button for 5 second, operation change to the odour removing operation.
•Operation detail is as follows;
Fan mode operation for 180 second, then refrigerant cycle change to heating mode for 720 second, to heat up (dry) the indoor unit. Compressor frequency and indoor fan controlled to maintain the indoor heat exchanger temperature 41°C.
•Indoor fan revolution is fixed (for DC motor type, fan speed is Slo, for AC motor type, fan speed is Lo), and indoor louver angle is fixed manual set no.1.
•After that, fan mode operation continue for 360 second, then odour removing operation finish.
•During odour removing operation, [ODOUR] sign is blinking at LCD display panel of wired remote controller ([ODOUR WASH] sign is not displayed for wireless remote controller), when pushing the operation button, or [ODOUR] button, odour removing operation finish and set the odour cut operation.
30
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