Panasonic CS-F50DD2E5 Service Manual

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ORDER NO. MAC0502040C2

Air Conditioner

CS-F50DD2E5 CU-L50DBE8

CONTENTS

Page Page

1 SERVICE INFORMATION 3

1.1. Example of trouble at test operation

1.2. Caution of test operation

1.3. Caution during automatic address setting

1.4. Operation Range

2 FEATURES

2.1. Variety of excellent features

2.2. New low-noise outdoor units

2.3. Greatly improved workability increases system renewal

capability

2.4. A brand-new control method using the latest in technology

3 SPECIFICATION

3.1. CS-F50DD2E5 CU-L50DBE8

4 DIMENSIONS

4.1. CS-F50DD2E5

4.2. CU-L50DBE8

5 REFRIGERATION CYCLE

6 BLOCK DIAGRAM

6.1. CS-F50DD2E5

CS-F50DD2E5 CU-L50DBE8

6.2. CU-L50DBE8 14

7 WIRING DIAGRAM

7.1. CS-F50DD2E5

7.2. CU-L50DBE8

8 OPERATION DETAILS

8.1. Wired Remote Control (Optional part)

9 OPERATION 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

9.11. Pump Down Operation

9.12. Indoor Air Volume Up Control (DC Fan Motor Type Only)

10 INSTALLATION INSTRUCTION

10.1. Pipe Length

10.2. Indoor unit installation

10.3. Outdoor unit installation

10.4. Wired remote controller installation

11 INSTALLATION & SERVICING AIR CONDITIONER

11.1. Outline

11.2. Tools for installing/servicing refrigerant piping

11.3. Refrigerant piping work

11.4. Installation, transferring, servicing

12 TROUBLE SHOOTING GUIDE

12.1. Self-diagnosis

13 REPLACEMENT PARTS

13.1. INDOOR UNIT

13.2. OUTDOOR UNIT

14 ELECTRONIC CIRCUIT DIAGRAM

14.1. Indoor unit

14.2. Outdoor unit

14.3. Wired remote control

14.4. Print pattern

CS-F50DD2E5 CU-L50DBE8

1 SERVICE INFORMATION

Notice of Address setting for NEW Duct / NEW Outdoor Unit.

The new Duct Type / 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,

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 followin g 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.

• •

this address setting is only

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.

1.4. Operation Range

The applicable voltage range for each unit is given in “the following table”. The working voltage among the three phases must be balanced within 3% deviation from each voltage at the compressor terminals. The starting voltage must be higher than 85% of the rated voltage.

1.4.1. Power Supply

Model

CU-

L34DBE5 L43DBE5

L50DBE8 3N~380 50 418 342

Unit Main Power Applicable Voltage

Phase, Volts Hz Maximum Minimum

1~220 50 242 198 1~230 50 253 207 1~240 50 264 216

3N~400 50 440 360 3N~415 50 457 374

1.4.2. Indoor and Outdoor Temperature

Model 50Hz ... L34DBE5, L43DBE5, L50DBE8

Operating Hz Indoor Temp. (D.B./W.B.) (°C) Outdoor Temp. (D.B./W.B.) (°C)

Maximum Minimum Maximum Minimum Cooling 50 32/23 21/15 43/- -15/Heating 50 27/- 16/- 24/18 -20/-

CS-F50DD2E5 CU-L50DBE8

2 FEATURES

2.1. Variety of excellent features

2.1.1. Compact design, height 36 cm

•

The height has been reduced to 36 cm, the equipment can

• •

be installed in limited spaces.

2.1.2. Versatile installation

•

The indoor unit is designed in order that air will also enter

• •

from below, for easier installation under differen t conditions.

2.1.5. Quiet operation

•

The sound level is as low as 45db (A) for 6 HP. The models

• •

is ideal for installation in offices, shop and houses where quiet operation is important.

2.1.6. Auto fan mode operation (indoor unit)

•

Auto fan mode is added to existing modes Hi, Me and Lo.

• •

It automatically adjusts the fan speed according to the indoor temperature.

2.1.7. Dry mode function

•

Dry mode can make a comfortable indoor environment

• •

during wet season.

2.1.8. Automatic changeover function (heat pump models)

•

The unit automatically switches between cooling and

• •

heating in accordance with operating load in order to maintain a confortable indoor temperature.

2.1.9. Common design for Indoor unit and Remote Control

•

The equipment has two drain outlets on the right and left

• •

side for adoption to the installation conditions in the building.

2.1.3. Easy maintenance

•

Equipped with a filter as standard. The filter can be

• •

removed in three directions for easier maintenance.

•

The indoor unit and the wired remote control are design as

• •

a common specification between Cooling only and Heat Pump models.

2.1.10. Wired Remote Control

•

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.

•

A built-in thermistor, allowing indoor temperature detection

• •

in accordance with indoor conditions by switching with main unit thermistor.

•

Twin non-polar wires make installation work easy (10 m

• •

cable supplied as accessories).

2.1.4. Static pressure selection

•

The static pressure is selectable; 5mmAq or 7mmAq. The

• •

static pressure can be selected according to the condition of the duct.

2.2. New low-noise outdoor units

CS-F50DD2E5 CU-L50DBE8

[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.

2.2.2. Automatic restart function

When the electric power resumes after a power failure, the unit will automatically restarts the operation in the pre-failure mode.

2.2.3. Low ambient cooling operation

Cooling operation is possible at outdoor temperature of -5°C.

CS-F50DD2E5 CU-L50DBE8

2.3. Greatly improved workability increases system renewal capability

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 and outdoor 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 unnecessary for 30 m

•

All models do not require any additional charging of

• •

refrigerant for 30 m 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 50 m.

• •

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 9.52mm, making installation

• •

work much easier.

CS-F50DD2E5 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 using the latest in technology

2.4.1. Power supply wiring is also easier

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 drives

• •

wires and signal wires. If a connection error is made, the relay does not operate and current does not flow to the circuit boards.

2.4.2. Separate indoor/outdoor unit power supplies

The power supply can be connected to (1) just the outdoor units, or (2) to both indoor and outdoor units.

2.4.3. 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 configuration (twin or triple format) and remote-control functions such as cooling only or heat pump model are automatically detected and set instantly.

2.4.4. Group control equipment

2.4.5. Twin operation

•

Simultaneous air conditioning of wide spaces and corners is

• •

possible. Indoor units of same horsepowers and models 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.

CS-F50DD2E5 CU-L50DBE8

3 SPECIFICATION

3.1. CS-F50DD2E5 CU-L50DBE8

ITEM / MODEL Indoor Unit Outdoor Unit

Main Body CS-F50DD2E5 CU-L50DBE8

Cooling Capacity kW 14.0

BTU/h 47,700

Heating Capacity kW 16.0

BTU/h 54,600 Refrigerant Charge-less m 30 Standard Air Volume for High Speed m3/min Cooling; 30, Heating; 38 -

cfm Cooling; 1059, Heating; 1342 -

External Static Pressure Pa Hi 98 -

mmAq Hi 10.0 Outside Dimension (H x W x D) mm 360 x 1000 x 650 1340 x 900 x 320

inch 14-3/16 x 39-3/8 x 25-19/32 52-7/8 x 35-7/16 x 12-19/32 Net Weight kg (lbs) 48 (106) 105 (231) Piping

Connection

Compressor Type, Number of Set - Hermetic - 1 (Rotary), 1

Fan Type, Number of Set Sirocco Fan Propeller fan-1

Air-heat Exchanger (Row x Stage x FPI) Slit-fin type (2 x 10 x 20) Louvre-fin type (2 x 36 x 19) Refrigerant Control Capillary tube Refrigerant Oil (Charged) cm Refrigerant (Charged) R410A kg (oz) - 3.50 (123) Running

Adjustment

Safety Devices Internal protector for compressor, Internal thermostat for fan motor,

Noise Level dB (A) Cooling : Hi 49 Lo 45 Cooling 54, Heating 56

Moisture Removal L/h 9.0 EER W/W 2.77 COP W/W 3.30

Refrigerant Gas mm (inch) O.D Ø 15.88 (5/8) Flared Type

Liquid mm (inch) O.D Ø 9.53 (3/8) Flared Type

Drain mm Female screw RC1 (PT1) I.D Ø 20 x 1

Starting Method - Direct on-line starting Motor Type - 4-pole single phase brushless motor

Rated Output kW - 3.8

Motor Type 4-pole single phase induction motor 6-pole single phase induction motor

Rated Output kW 0.27 0.07 x 2

Control Switch Wired Remote Control Room Temperature Thermostat -

Crankcase heater, High pressure switch, Current transformer

Heating : Hi 47 Lo 44

Power level dB Cooling : Hi 64 Lo 60

Heating : Hi 62 Lo 59

- FV50S (1200)

Cooling 68, Heating 70

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 Condition by JIS-B8615 Volts V 380 400 415 Phase 3N 3N 3N Power Consumption kW Cool 5.06 5.06 5.06

Heat 4.85 4.85 4.85

Running Current A Cool 8.0 7.7 7.4

Heat 7.7 7.4 7.2 Starting Current A 8.0 7.7 7.4 Power Factor % Cool 96 95 95

Heat 96 95 94 *Power Factor means total figure of compressor, indoor fan motor and outdoor fan motor. Panasonic Power source AC, 3N~380V, 400V, 415V 50Hz

CS-F50DD2E5 CU-L50DBE8

4 DIMENSIONS

4.1. CS-F50DD2E5

4.2. CU-L50DBE8

CS-F50DD2E5 CU-L50DBE8

5 REFRIGERATION CYCLE

6 BLOCK DIAGRAM

6.1. CS-F50DD2E5

CS-F50DD2E5 CU-L50DBE8

6.2. CU-L50DBE8

7 WIRING DIAGRAM

7.1. CS-F50DD2E5

CS-F50DD2E5 CU-L50DBE8

7.2. CU-L50DBE8

8 OPERATION DETAILS

8.1. Wired Remote Control (Optional part)

CS-F50DD2E5 CU-L50DBE8

8.1.1. 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

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.

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

TIMER/CLOCK SET buttons

Used to set the timer operation and the current time.

Operation indicator

Lights up when the unit in operation.

NOTES

•

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 malfun ction 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)

•

Buttons marked with

• •

are not available for operation. If one of these buttons is pressed function will not be available.

CS-F50DD2E5 CU-L50DBE8

8.1.2. Remote Control - Display

8.1.3. Remote Control - Panel

CS-F50DD2E5 CU-L50DBE8

8.1.4. Setting Current Time

•

The current time needs to be set when you turn on the power for the first time or after a long time has elapsed since the power

• •

was last turned on.

•

The current time becomes the standard time for all the Timer operations.

• •

•

Set the current time and day accurately.

• •

•

Example : Current Day is Wednesday and Current Time is 8:00.

• •

Note:

•

Press “UP button” to increase or “DOWN button” to decrease (interval 1 minute) or hold the button to change the time faster.

• •

•

If the “UP or DOWN button” is not pressed for 30 seconds during the day or time setting or if the “SELECT button” is

• •

pressed, the setting at that moment is confirmed and setting will end.

8.1.5. How To Select The Timer

•

2 types of Timer mode can be selected on the remote control.

• •

−

Daily Timer

− −

−

Weekly Timer

− −

•

These timers cannot be operated simultaneously.

• •

•

Select one of these Timers for your convenience.

• •

How to Change the Display

•

Press once to change the display from CLOCK to Timer or vice-versa.

• •

•

Press more than 3 seconds to change the display from Daily Timer to Weekly Timer or vice-versa.

• •

CLOCK Display (To set current Day and Time)

Note:

•

The above display is shown if no valid timer setting is made.

• •

•

If valid timer setting is made.

• •

−

Timer

− −

−

If you want to check the current time and day, press “MODE button” once.

− −

and setting will be displayed.

(However, after a few seconds, the display will change back to Timer

CS-F50DD2E5 CU-L50DBE8

and the setting)

8.1.6. Daily Timer Setting

•

Display

• •

•

How to Set Daily Timer

• •

−

You can set only “ON” or only “OFF” or “ON” and “OFF” in a day.

− −

1. Change Display

Press “MODE button” to change the display to daily timer.

2. ON-Timer, OFF-Timer and select Time

Press “SELECT button”; ON-Timer setting will be displayed.

Press “UP or DOWN button” to select the desired time, (Example: ON 9:00), then press “SET button” to confirm the selected desired time.

Or press “CANCEL button” if you do not want any setting for ON-Timer.

Then OFF-Timer setting will be displayed.

Press “UP or DOWN button” to select the desired time, (Example: OFF 18:30), then press “SET button” to confirm the selected desired time.

Or press “CANCEL button” if you do not want any setting for OFF-Timer.

Note:

•

The setting timer will be activated everyday.

• •

•

Timer nearer to the current time will be activated first.

• •

CS-F50DD2E5 CU-L50DBE8

Final Display of Daily Timer:

8.1.7. Weekly Timer Setting

•

Display

• •

•

How to Set Weekly Timer

• •

−

You can set the Timer for 1 week (Monday to Sunday ) with 6 programs per day.

− −

−

ON-Timer can be set together with your desired temperature. However, this temperature will be used continuously.

− −

−

Cannot set 2 programs with same time setting in a day.

− −

−

You also may select Collective - many days with same time setting or Individual

− −

−

single/one day setting.

− −

1. Change Display

Press “MODE button” to change the display to weekly timer.

2. Select Day (please refer to next page for example of setting)

You may select Collective or Individual day setting.

•

Collective day setting.

• •

Press “SELECT button”: display will show day selection setting.

Press “UP or DOWN button” to select the day. Then press “SET button” to delete triangle mark (deselect) or add triangle mark (select).

(Triangle mark on top of each day indicates the day to be selected).

Repeat these steps if you want to deselect or select many days.

To confirm the selected days, press the “SELECT button”.

•

Individual day setting.

• •

Press “UP or DOWN button” to select the day.

Then press “SELECT button”.

3. Select Time (please refer to next page for example of setting)

For 1st program setting.

Press “UP or DOWN button” to select ON or OFF.

Then press “SET button” to confirm.

Press “UP or DOWN button” again to select the desired time.

(If you want to set them together with your desired temperature, press “TEMP UP/DOWN button” to select the temperature).

Then press “SET button” to confirm.

Or press “CANCEL button” if you do not want to set any time.

For 2nd ~ 6th program you may refer to the above step.

For example , if you want to set:

A - Monday to Friday: Same time, 1st program ON 9:00 & 2nd program OFF 16:00.

B - Only Wednesday: Additional 3rd program OFF 12:30 & 4th program ON 13:30.

C - Only Saturday: 1st program ON 10:00 with 20°C & 2nd program OFF 14:00.

D - Sunday: Holiday. No need to set any Timer.

•

To set A (Monday to Friday - Collective day setting)

• •

Press “SELECT button”

To select Monday to Friday, deselect Saturday and Sunday by pressing “UP or DOWN button” to Saturday, press “SET button” (triangle mark on top of Saturday will disappear)

Follow the same step to deselect Sunday.

Ensure triangle mark appears on top of Monday ~ Friday.

−

To confirm the selected days, press “SELECT button”.

− −

To set the time, please refer to step 3. Select time at page 23.

−

1st program - select ON and desired time to 9:00.

− −

2nd program - select OFF and desired time to 16:00.

3rd ~ 6th program - press “CANCEL button”.

•

To set B (Wednesday - Individual day setting)

• •

−

Press “UP or DOWN button” to select WED (Wednesday).

− −

Then press “SELECT button”.

To set the time, please refer to step 3. Select time at page 23.

−

1st program - press “SET button” twice (confirm ON and 9:00)

− −

2nd program - also press “SET button” twice. (Confirm OFF and 16:00)

3rd program - select OFF and desired time to 12:30

4th program - select ON and desired time to 13:30

5th ~6th program - press “CANCEL button”

CS-F50DD2E5 CU-L50DBE8

•

To set C (Saturday - Individual day setting)

• •

−

Follow the same step as above.

− −

To set the time, please refer to step 3. Select time at page 23.

−

1st program - select ON, desired time to 10:00 and desired temperature to 20°C.

− −

2nd program - select OFF and desired time to 14:00.

3rd ~ 6th program - press “CANCEL button”.

−

Final Display for Weekly timer may show as:

− −

(Display is showing, 9:00 ON - Timer on Wednesday will be activated next because it is nearest the current day/time.)

Note:

•

Timer that has setting nearest to current time and day will be activated first.

• •

•

To check the setting timer, press “SELECT button”, then “UP or DOWN button” to select day. The display will show each

• •

program for the selected day.

•

To reset the setting for all, press “SELECT button”, then ensure all day setting with triangle mark. Then press “CANCEL

• •

button” for all the programs.

CS-F50DD2E5 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

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.

Discharge temp. [°C] >15°C 15°C

Start control Cool start Warm start

Warm start : set 1→*set 5→normal control

Cool start : set 1→set 2→set 3→set 4→*set 5→normal control

•

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.

CS-F50DD2E5 CU-L50DBE8

−

Unit using DC motor

− −

As follow the below figure, fan speed changing operation (program air).

(rpm center B and

−

Unit using AC motor

− −

is differen t if capacity rank is different)

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

• •

wash mode when compressor start or shift to thermostat on from thermostat off.

•

Odour cut operation is under below condition.

• •

Operation mode Cool or dry mode Odour wash setting Setting No setting

Fan setting Auto Odour cut Odour cut

Manual Odour cut -

•

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 Thermostat ON Thermostat ON & comp ON

Time 40 [Sec] 50 [Sec] - 20 [Sec] 120 [Sec] 20 [Sec] 40 [Sec] 50 [Sec] -

Cool Auto DC motor OFF SSLo Program air SSLo OFF SSLo OFF SSLo Program air

AC motor OFF Lo Hi Lo OFF Lo OFF Lo Me

Dry Auto DC motor OFF SSLo SLo SSLo OFF SSLo OFF SSLo SLo

AC motor OFF Lo Lo Lo OFF 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.

• •

CS-F50DD2E5 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

Stop zone If continue for 6 min, compressor stop

(check for 3 min, max 3 times)

(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

No change zone Continue check the indoor heat excahnger temperature Down zone Reduce the compressor frequency

Cassette type : fix the manual 3rd position Ceiling type : fix the manual 2nd position

(check for 3 min, max 3 times)

CS-F50DD2E5 CU-L50DBE8

9.3.6. Drain pump control

•

During cooling, dry, or defrost operation, drain pump operate by followin g 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)

• •

CS-F50DD2E5 CU-L50DBE8

Fan speed auto

•

When operation start, or during operation, fan speed control by detecting indoor heat exchan ger 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.

CS-F50DD2E5 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.

• •

CS-F50DD2E5 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

− −

Operation mode Display manual

Set 1 Set 2 Set 3 Set 4

Normal 20° 35° 50° 70°

Heating Defrost 10°

Hot start 10°

Thermostat off 20°

Fan 20° 35° 50° 70°

Cooling Normal 20° 35° 50° 70°

(fan) Dew control 50°

Thermostat off 20° 35° 50° 70°

Normal 30°

Dry Dew control 50°

Thermostat off 20° 35° 50° 70°

Operation mode judge 20° 35° 50° 70°

Stop mode 0°

−

Louver auto setting

− −

Operation Display auto set

AUTO 1 AUTO 2 AUTO 3

A 70° 70° 70°

Normal Sensor B 20° - 70° 20° - 50° 40° - 70°

Heating C 20° 20° 20°

Defrost 10°

Hot start 10°

Thermostat off 20°

Fan 20° - 70° 20° - 50° 40° - 70°

Cooling Normal 20° - 70° 20° - 50° 40° - 70°

(Fan) Dew control 50°

Thermostat off 20° - 70° 20° - 50° 40° - 70°

Normal 30°

Dry Dew control 50°

Thermostat off 20° - 70° 20° - 50° 40° - 70° Operation mode judge 20° 20° 20° Stop mode 0°

•

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

CS-F50DD2E5 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 Manual Auto

Operation mode Display

Set 1 Set 2 Set 3 Set 4 Piping temp (heating)

A B C

Normal 20° 35° 50° 70° 70° 20° - 70° Set 1

Heating Defrost 20°

Hot start 20°

Thermostat off 20°

Fan 20° 35° 50° 70° 20° - 70°

Cooling Normal 20° 35° 50° 70° 20° - 70°

(fan) Dew control 35°

Thermostat off 20° 35° 50° 70° 20° - 70°

Normal 35°

Dry Dew control 35°

Thermostat off 20° 35° 50° 70° 20° - 70° Operation mode judge 20° 35° 50° 70° 20° Stop mode 70°

CS-F50DD2E5 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.

CS-F50DD2E5 CU-L50DBE8

9.7. Energy Save Operation

•

During cooling operation, or heating operation, when pushing the [ECONOMY] button in the wired remote controller, energy

• •

save operation start and [ECO] sign is displayed at LCD display panel of wired remote controller ([ECONOMY] sign is displayed at LCD display panel of wireless remote controller).

•

When energy save operation start and temperature differences is +1K (=indoor suction temperature - setting temperature) for

• •

cooling operation, or -1K for heating operation for 30 minute, thermostat OFF point shift to 0.5K.

(This means thermostat OFF point shift up +0.5K for cooling, thermostat OFF point shift down -0.5K for heating)

From this control, it is judged that indoor side heat loss is small, then reduce compressor frequency. This means energy save operation.

•

Those kind of operation continue maximum 4 times. If temperature is out of range (thermostat off +1K for cooling, thermostat

• •

off -1K for heating), operation release from energy save control. But energy save control cannot be released by pushing ON/OFF button of remote controller, but still effective. When pushing [ECONOMY] button once again, energy save control released.

9.8. Outdoor Fan Remaining Heat Removal Control

•

When compressor stop, outdoor fan operate for 1 minute to remove the remaining heat.

• •

9.9. Crank Case Heater Control

•

Crank case heater power is on to prevent the refrigerant solving into compressor oil inside of the compressor shell at cold

• •

condition.

•

When below conditions are satisfied, crank case heater power on.

• •

−

Compressor stop

− −

−

Outdoor temperature

− −

−

Compressor discharge temperature

− −

15°C

9.10. Valve Error

•

When install the air conditio ner unit and try to start forced operation (cooling mode) after completion the installation, in case of

• •

3 way valve close, valve error displayed at the wired remote controller to protect the compressor.

•

This error can be detected to satisfy below conditio n, when power is on at first time and within 7 minute from compressor start.

• •

(However, it is judged that power on is the first time until compressor start operating continuosly for 7 minute)

−

Indoor heat exchanger temperature when compressor start - 3K < current indoor heat exchanger temperature for 5 minute

− −

−

Indoor suction temperature - 3K < current heat exchanger temperature for 5 minute.

− −

CS-F50DD2E5 CU-L50DBE8

9.11. Pump Down Operation

•

When pushing the [PUMP DOWN] button on the outdoor PCB for 1 second, pump down operation start. Detail of pump down

• •

operation is shown at below table.

•

During pump down operation, push the [PUMP DOWN] button once again for 1 second, pump down operation stop.

• •

•

After 600[Sec] past, pump down operation stop.

• •

9.12. Indoor Air Volume Up Control (DC Fan Motor Type Only)

•

Indoor air volume up control set by local setting mode of wired or wireless remote controller.

• •

(item 01, 00: standard / 01: Air volume up mode)

(only for DC motor type)

•

Due to air volume up control, indoor fan revolution increase in case of Hi speed setting only.

• •

•

This control is memorized in the micro computer, it cannot be reset by power off.

• •

10 INSTALLATION INSTRUCTION

10.1. Pipe Length

10.1.1. Correction of cooling and heating capacities

CS-F50DD2E5 CU-L50DBE8

Correction of cooling and heating capacities according to the connec ting pipe length. The data of cooling capacities (marked on the name plate) are based on 7.5 metres connecting pipe and horizontal installation. (Cooling)

For other pipe length of other installation multiply by the following correction factor to determine the revised cooling capacity.

(Heating)

Equivalent Length = actual pipe length + number of elbow x ELE + number of oil trap x ELO

ELE : equivalent length of elbow. ELO : equivalent length of oil trap.

10.1.2. Refrigerant additional charge

•

The piping length exceeds 30 metres.

• •

APPLICABLE FOR ALL MODELS

Before shipment, this air conditioner is filled with the rated amount of refrigerant subject to 30m piping length. (The rated amount of refrigerant is indicated on the name plate.) But when the piping length exceeds 30m, additional charge is required according to the following table.

Outer diameter of gas

side pipe mm (inch)

9.52 0.18

12.7 (1/2) 0.20

15.88 (5/8) 0.25

19.05 (3/4) 0.35

Model Ref. Charge

2.5~6HP 50g per 1m

Example :

CS-F50DD2E5 In case of 31m long pipe (one-way), the amount of refrigerant to be replenished is: (31 - 30) x 50 = 50g

CS-F50DD2E5 CU-L50DBE8

10.2. Indoor unit installation

DUCT TYPE AIR CONDITIONERS INSTALLATION INSTRUCTIONS

Precautions in terms of safety

Carry out installation work with reliability after thorough reading of this “Precautions in terms of safety”.

•

Precautions shown here are differen tiated between

• •

leading to significant result such as fatality or serious injury if wrong installation would have been carried out are listed compiling them especially into the column of

Warnings .

Warnings and Caution s . Those that have much chances for

However, even in the case of items which are listed in the column of

Cautions , such items also have a chance for leading

to significant result depending on the situations.

In either case, important descriptions regarding the safety are listed, then observe them without fail.

•

As to indications with illustration

• •

This mark means “Caution” or “Warning”. This mark means “Earth”.

•

After installation work has been completed, do not only make sure that the unit is free from any abnormal condition through the

• •

execution of trial run but also explain how to use and how to perform maintenance of this unit to the customer according to the instruction manual.

In addition, request the customer to keep this manual for installation work together with the instruction manual.

Warnings

The appliance must be installed by technician, who takes into account the requirements given by ISO5149 or eventual equivalent requirements.

As to installation, request the distributor or vendor to perform it. Imperfection in installation caused by that having been carried out by the customer himself may lead to water leakage, electric shock, fire, etc.

Carry out the installation work with reliability according to this manual for installation work. Imperfection in installation leads to water leakage, electric shock, fire, etc.

Carry out the installation work with reliability on the place that can bear the weight of this unit sufficiently. Insufficient strength leads to injury due to falling of the unit.

Carry out predetermined installation work in preparation for strong wind such as typhoon, earthquake. Imperfection in installation work may lead to accidents arisen from overturn, etc.

The unit must be installed in accordance with applicable national and local regulations. Any electrical work should only be carried out by qualified technician and use exclusive circuits without fail. Presence of insufficient capacity in power circuit or imperfection in execution leads to electric shock, fire, etc.

If installing inside a small room, measures should be taken to prevent refrigerant levels from building up to critical concentrations in the event of a refrigerant leak occurring. Please discuss with the place of purchase for advice on what measures may be necessary to prevent critical concentrations being exceeded. If the refrigerant leaks and reaches critical concentration levels, there is the danger that death from suffocation may result.

Securely attach the protective covers for the outdoor unit connection cables and power cord so that they do not lift up after installation. If the covers are not properly attached and installed, the terminal connections may overheat, and fire or electric shock may result.

Switch off all supplies before accessing any electrical part.

If refrigerant gas escapes during installation, ventilate the affected area. If the refrigerant gas comes into contact with sparks or naked flames, it will cause toxic gases to be generated.

Once installation work is completed, check that there are no refrigerant gas in the room that can come into contact with sparks or flames from a fan heater, stove or kitchen range, which will cause toxic gases to be generated.

When performing piping work do not mix air except for specified refrigerant (R410A) in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension inside the refrigerant cycle.

Warnings

Wiring shall be connected securely using specified cables and fix them securely so that external force of the cables may not transfer to the terminal connection section. Imperfect connection and fixing leads to fire, etc.

Cautions

Carry out Earthing work. Do not connect the Earth return to the gas pipe, water line pipe, lightning rod and telephone lines. Imperfection in Earth return may lead to electric shock.

Do not install the unit at the place where the possibility of inflammable gas leakage exists. If such gas leakage should arise and the gas builds up around the unit, such situation may lead to ignition.

Mounting of the earth leakage circuit breaker is required. Omission in mounting of the earth leakage circuit breaker may lead to electric shock.

Drain piping should be made to ensure secure drainage according to the manual for installation work and carry out the thermal insulation to prevent the occurrence of condensation. Imperfection in piping work leads to water leakage and may cause the house and property, etc. to become wet

Position the indoor unit, outdoor unit, power cords and indoor/outdoor unit connection cables in a way so that they are at least 1 meter away from televisions and radios. This is to avoid problem such as interference with picture and/or sound. (However, note that depending on the electromagnetic wave conditions, interference may still occur even if the separation distance is more than 1 meter.)

10.2.1. Accessories packed in the indoor unit container

CS-F50DD2E5 CU-L50DBE8

NO. Parts name Q’ty

1 Thermal insulator for refrigerant pipe 2 2 Hose clip for thermal insulator 5 3 M10 Flange washer 4 4 M10 Flat washer 4 5 Thermal insulator for drainage hole 1 6 Flexible hose 1

10.2.2. Selecting the location for the indoor unit

Provide a check port on the piping side ceiling for repair and maintenance.

•

Install the indoor unit once the following conditions are satisfied and after receiving the customer approval.

• •

1. The indoor unit must be within a maintenance space.

2. The indoor unit must be free from any obstacles in path of the air inlet and outlet, and must allow spreading of air throughout the room.

*If the height from the floor to ceiling exceeds three meters, air flow distribution deteriorates and the effect is decreased.

3. The installation position must be able to support a load four times the indoor unit weight.

Warnings

4. The indoor unit must be away from heat and steam sources, but avoid installing it near an entrance.

5. The indoor unit must allow easy draining.

6. The indoor unit must allow easy connection to the outdoor unit.

7. Place the indoor unit easy water drainage. (Suitable dimension “H” is necessary to get slop to drain as figure.)

8. The indoor unit must be from at least 3m away from any noise-generating equipment. The electrical wiring must be shielded with a steel conduit.

CS-F50DD2E5 CU-L50DBE8

9. If the power supply is subject to noise generation, add a suppressor.

10. Do not install the indoor unit in a laundry. Electric shocks may result.

Note

•

Thoroughly study the following installation locations.

• •

1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction, sprayin g, dispersing of water drops, drain pump malfunction, etc.

In these cases, take the followin g actions:

−

Make sure that the ventilation fan for smoke-collecting hood on a cooking table has suffcient capacity so that it draws

− −

oily steam which should not flow into the suction of the air conditioner.

−

Make enough distance from the cooking room to install the air conditioner in such place where it may not suck in oily

− −

steam.

2. Avoid installing the air conditioner in such circumstances where cutting oil mist or iron powder exist especia lly in factories, etc.

3. Avoid places where inflammable gas is generated, flows-in, contaminated, or leaked.

4. Avoid places where sulphurous acid gas or corrosive gas can be generated.

5. Avoid places near high frequency generators.

10.2.3. Installation of indoor unit

POSITION OF SUPENSION BOLT

•

Apply a joint-canvas between the unit and duct to absorb unnecessary vibration.

• •

•

Install the unit learning to a drainage hole side as a figure for easy water drainage.

• •

CS-F50DD2E5 CU-L50DBE8

10.2.4. Refrigerant piping

•

Refrigerant is charged to the outdoor unit. For details, see the manual for installation work of outdoor unit. (Additional charging,

• •

etc.)

1. Brazing for piping.

a. Execute brazing before tightening the flare nut.

b. Brazing must be executed while blowing nitrogen gas.

(This prevents generation of oxidized scale in copper pipe.)

2. When there is a lot of brazings for long piping, install a strainer midway of the piping. (The strainer is locally supplied.)

3. Use clean copper pipe with inner wall surface free from mist and dust. Blow nitrogen gas or air to blow off dust in the pipe before connection.

4. Form the piping according to its routing. Avoid bending and bending back the same piping point more than three times. (This will result in hardening of the pipe).

5. After deforming the pipe, align centers of the union fitting of the indoor unit and the piping, and tighten them firmly with wrenches.

6. Connect pipe to the service valve or ball valve which is located below the outdoor unit.

7. After completed the piping connection, be sure to check if there is gas leakage in indoor and outdoor connection.

Vacuum drying

After completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit.

The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves.

CAUTION Use two wrenches and tighten with regular torque.

•

Confirm the red mark of the union (thin side) is always at

• •

lower direction after connecting piping.

Flare nut fastening torque N.m (kgf.cm) ø6.35 mm 18 (180) ø12.7 mm 55 (560) ø19.05 mm 100 (1020) ø9.52 mm 42 (430) ø15.88 mm 65 (660)

10.2.5. Indoor unit drain piping

•

The unit has two drainage holes at both side.

• •

The drainage hole without connection needs seal and thermal insulation with accessories.

•

Always lay the drain with downward inclination (1/50 to 1/100).

• •

Prevent any upward flow or reverse flow in any part.

•

5mm or thicker formed thermal insulator shall always be

• •

provided for the drain pipe.

Liquid side piping Gas side piping

ø9.52 mm ø15.88 mm

CS-F50DD2E5 CU-L50DBE8

10.2.6. Heat Insulation

Caution Be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads to water leakage.

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C).

2. Precautions in high humidity circumstance.

This air conditioner has been tested according to the “JIS Standard Conditions with Mist” and have been confirmed that there are no faults. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 23°C), water drops are liable to fall. In this case, add heat insulation material according to the following procedure:

•

Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20mm.

• •

•

Stick glass wool on all air conditioners that are located in ceiling atmosphere.

• •

•

In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick piping) and drain

• •

piping, add a further of 10mm to 30mm thickness material.

Wall seal

•

When the outdoor unit is installed on a higher position than the indoor unit, install the trap so as not to instill rain water into

• •

the wall by transmitting in piping.

•

Stuff the space among piping, the electric wire, and the drain hose with “Putty” and seal the penetration wall hole.

• •

Make sure that rain water do not instill into the wall.

*Put the incision at the trap part of the heat insulator (for water drain)

10.2.7. Electrical wiring

As to main power source and cable size of outdoor unit, read the installation manual attached to the outdoor unit.

The units must be installed in accordance with applicable national and local regulations.

Warning The units installed by a professional installer must be supplied from a dedicated electrical circuit.

All electrical work must be carried out by a qualified technician according to proper technical standards for electrical work and according to installation manual for installation work.

If circuit with insufficient capacity are used, or if electrical work is not carried out properly, electric shocks or fire may result.

Caution Be sure to install a current leakage breaker or circuit breaker to the main power supply, otherwise electric shocks may result. Caution Be sure to connect the unit to secure earth connection. (with an earth resistance of 100Ωor less)

If the earthing work is not carried out properly, electric shocks may result.

Warning Wiring shall be connected securely using specified cables and fix them securely so that external force of the cables may not

transfer to the terminal connection section. Imperfect connection and fixing leads to fire, etc.

1. Select a power source that is capable of supplying the current required by the air conditioner.

2. Feed the power source to the unit via a distribution switch board designed for this purpose, the switch should disconnected all poles with a contact separation of at least 3 mm.

CS-F50DD2E5 CU-L50DBE8

3. Always ground the air conditio ner with a grounding wire and screw to meet the LOCAL REGULATIONS.

4. Be sure to connect the wires correctly to terminal board with connecting the crimp type ring terminal to the wires.

5. Be sure to turn off the main power before installing and connecting the remote controller.

Note If momentarily turning on the power supply for both the indoor and outdoor units, do not turn the power off after at least 1 minute has

•

Use the standard power cord for Europe (such as H05RN-F or H07RN-F which conforms to CENELEC (HAR) rating

• •

passed. (For the system’s automatic setting.) Turning off the power supply on the way may cause an abnormal operation.

specifications) or use the cables based on IEC standard. (245IEC57, 245IEC66)

CONNECTING THE WIRES TO THE CONTROL BOX

•

Remove two screws

• •

,remove the control box cover, and then connect the wires by following the procedure given in the illustration.

•

Remove the control box for electrical connection between

• •

the indoor and outdoor unit. (Remove two screws

•

Use the cord clamper to fix the cord.

• •

Caution

Make sure that screws of the terminal are free from Looseness. Fastening torque

M4... 118N.cm (12kgf.cm) M5... 196N.cm (20kgf.cm)

CS-F50DD2E5 CU-L50DBE8

10.2.8. Settings

*Do not operate the remote controller within 1 minute after turning on the power of the indoor unit.

*When using group control with the standard type, at least 1 unit must be set at No.1 at the indoor unit.

*Check the settings of the indoor unit in a case where there are no display at remote controller. If there is no problem to the settings, either group control or standard type should be set at No.16 at the indoor unit before turning the power on again.

•

All sets in the group which uses the same remote controller thermistor settings can be controlled by the same remote controller

• •

thermistor.

•

Up to a maximum of 16 indoor units can be connected at the time of group control. (Do not connect heat pump unit with cooling

• •

only unit.)

•

Indoor unit No. will be set automatically at the time of group control. However, which indoor unit uses which number is unknown.

• •

Indoor unit No. is also possible to be set manually with DIP switches. Since manual address setting has priority to automatic address setting. To perform automatic address setting after doing manual setting, turn off all DIP switches from No.1 to No.4, and then stop the operation. Then press three switches such as [AIR SWING AUTO]

(Do not use manual address setting and automatic address setting together.)

•

Centralized control is possible for master unit and slave unit at the time of group control.

• •

[MODE] [A/C No.] at the same time.

(Remote Controller address setting) (Refer to the Installation Manual which is provided with the remote controller for details.)

•

Two remote controllers (including the wireless remote controller) can be connected. However, remote control thermistor setting is not

• •

possible.

•

As for [master/slave] setting of remote controller, the automatic setting and manual setting are possible. Since manual setting is priority.

• •

•

Two remote controllers, which both are wireless, cannot be connected.

• •

10.2.9. As for timer output

•

Connect the timer cord to connector (CN-TIMER) on print circuit board.

• •

CS-F50DD2E5 CU-L50DBE8

10.2.10. Precautions in test run

•

The initial power supply must provide at least 90% of the rated voltage. Otherwise, the air conditioner may not operate.

• •

•

Test operation can be carried out using the remote control unit or at the outdoor unit. (If carrying out test operation at the

• •

outdoor unit, refer to “TEST OPERATION” in the outdoor unit installation manual.)

•

If using the remote control unit to carry out test operation, follow the procedure given below.

• •

•

First, press the OFF/ON (

• •

•

Then press the TEST RUN button within 1 minute of pressing the OFF/ON (

• •

•

Next, select the operation modes.

• •

•

The temperature of the indoor unit pipes will be shown on the temperature setting display. (At the start of the test

• •

operation, it may take up to 1 minute for air conditioner number, switching time and other displays to appear.)

•

After operation modes have been selected, stop the compressor for a moment.

• •

•

Press the OFF/ON (

• •

) button.

) button of the TEST RUN button once more to cancel test operation mode.

NOTE 1 These units are equipped with connection error prevention circuits. If the units do not operate, it is possible that the connection

NOTE 2 Do not short the remote control unit wires to each other. (The protection circuit will be activated and the units will not operate.)

NOTE 3 When running the units in heating mode during test operation, be sure to run the units in cooling mode first before selecting

NOTE 4 Test operation should be carried out for a minimum of 5 minutes. (Test operation will be cancelled automatically after 30

NOTE 5 Test operation mode should always be cancelled once test operation itself has been completed.

error prevention circuits have been operated. In such cases, check that the Indoor/outdoor unit connection wire (connected to terminals should then commence.

Once the cause of the short is eliminated, normal operation will then be possible.

this mode. If heating mode is selected first, it may cause problems with operation of the compressor. (Heat pump model only.)

minutes.)

, and ) is connected correctly. If they are connected incorrectly, connect them correctly. Normal operation

10.2.11. Check the following items when installation is complete

•

After completing work, be sure to measure and record trial run properties, and store measuring data, etc.

• •

•

Measuring items are room temperature, outside temperature, suction temperature, blow out temperature, wind velocity, wind

• •

volume, voltage, current, presence of abnormal vibration and noise, operating pressure, piping temperature, compressive pressure, airtight pressure.

•

As to the structure and appearance, check the following items.

• •

Is circulation of air adequate? Is draining smooth? Is heat insulation complete (refrigerant and drain piping)? Is there any leakage of refrigerant?

Is remote controller switch operated? Is there any faulty wiring? Are the terminal screws loosened?

M3... 69-98N.cm {7-10kgf.cm} M4... 157-196N.cm {16-20kgf.cm} M5... 196-245N.cm {20-25kgf.cm}

10.2.12. Hand over

•

Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature

• •

control, etc.)

As to parts to be sold separately

•

With regards to installation of the parts sold separately, follow the installation manual which is provided with the parts sold

• •

separately.

As for work specifications of the outdoor unit, read the OUTDOOR UNIT INSTALLATION MANUAL attached to the outdoor unit.

CS-F50DD2E5 CU-L50DBE8

10.3. Outdoor unit installation

AIR CONDITIONERS OUTDOOR UNIT INSTALLATION INSTRUCTIONS

Precautions in terms of safety

Carry out installation work with reliability after thorough reading of this “Precautions in terms of safety”.

•

Precautions shown here are differen tiated between

• •

leading to significant result such as fatality or serious injury if wrong installation would have been carried out are listed compiling them especially into the column of

Warnings .

Warnings and Caution s . Those that have much chances for

However, even in the case of items which are listed in the column of

Cautions , such items also have a chance for leading

to significant result depending on the situations.

In either case, important descriptions regarding the safety are listed, then observe them without fail.

•

As to indications with illustration

• •

This mark means “Caution” or “Warning”. This mark means “Earth”.

•

After installation work has been completed, do not only make sure that the unit is free from any abnormal condition through the

• •

execution of try run but also explain how to use and how to perform maintenance of this unit to the customer according to the instruction manual.

In addition, request the customer to keep this manual for installation work together with instruction manual.

Warnings

The appliance must be installed by technician, who takes into account the requirements given by ISO5149 or eventual equivalent requirements.

Carry out the installation work with reliability according to this manual for installation work. Imperfection in installation leads to water leakage, electric shock, fire, etc.

Carry out the installation work with reliability on the place that can bear the weight of this unit sufficiently. Insufficient strength leads to injury due to falling of the unit.

Carry out predetermined installation work in preparation for strong wind such as typhoon, earthquake. Imperfection in installation work may lead to accidents arisen from overturn, etc.

Switch off all supplies before accessing any electrical part.

If refrigerant gas escapes during installation, ventilate the affected area. If the refrigerant gas comes into contact with sparks or naked flames, it will cause toxic gases to be generated.

CS-F50DD2E5 CU-L50DBE8

Warnings

Cautions

Carry out Earthing work. Do not connect the Earth return to the gas pipe, water line pipe, lightning rod and telephone lines. Imperfection in Earth return may lead to electric shock.

Do not install the unit at the place where the possibility of inflammable gas leakage exists. If such gas leakages should arise and the gas builds up around the unit, such situation may lead to ignition.

Mounting of the earth leakage circuit breaker is required. Omission in mounting of the earth leakage circuit breaker may lead to electric shock.

10.3.1. Accessories supplied with outdoor unit

•

The following parts are supplied as accessories with each outdoor unit.

• •

Check that all accessory parts are present before installing the outdoor unit.

Part name Q’ty Diagram Application

Protective

bushing

Banding

strap

2 For protecting electrical

wires

3 For tying electrical wires

together

Position the indoor unit and outdoor unit, power cords and indoor/outdoor unit connection cables in a way so that they are at least 1 meter away from televisions and radios. This is to avoid problem such as interference with picture and/or sound. (However, note that depending on the electromagnetic wave conditions, interference may still occur even if the separation distance is more than 1 meter.)

Heat pump-types only

Part name Q’ty Diagram Application

Drain elbow AS 1 For connecting the drain

pipe (with ring seat)

10.3.2. Before installation work

•

This product is using new refrigeration (R410A). The basic way of installation work is the same as usual, but water and

• •

impurities should be controlled more strictly than before due to characteristic of refrigerating machine oil. Therefo re, selection of materials to use and processing, storing and brazing need appropriate construction and control.

1. Tools and materials

There are tools and materials for both new refrigeration and usual refrigeration you can use together and for either two of them you can use. Use the below for new refrigeration.

−

Vacuum pump (with back flow preventor system)

− −

−

Gas leakage detection warning decive

− −

−

Gauge manifold

− −

−

Charge hose

− −

2. Installation work

a. Brazing work

Brazing work needs replacing air inside pipe with nitrogen gas in order to prevent oxidization scale from occurring. This is called nitrogen replacement, and one of very important work in brazing refrigerant piping. (Oxidation preventive is not possible to use)

CS-F50DD2E5 CU-L50DBE8

b. Prevention measure for refrigerant piping

Prevention measure for refrigerant piping is very important work to prevent water-dust-rubbish from getting in. All piping terminals needs sealing such as shown below.

Place Period of work Method of seal

Outside More than 1 month Pinch

Less than 1 month Pinch or taping

Inside Not specified

−

How to pinch

− −

Close terminal part of piping with pliers and seal the gap with brazing.

−

How to tape

− −

Seal terminal part of piping with vinyl tape.

3. Vacuum pumping

The purpose of vacuum pumping work is to remove and dry air inside the piping or nitrogen at air tightness test.

Perform the work carefully.

Caution Use the vacuum pump with the backflow prevention mechanism to prevent backflow of oil.

Vacuuming time 60 minutes or more Vacuum pump capacity

60 l/min or more

4. Refrigerant filling

Refrigerant filling must be done in the state of liquid refrigerant. If this is done in gas refrigerant, the balance of refrigerant composition will collapse and damage the operation.

CS-F50DD2E5 CU-L50DBE8

For the use of a gas cylinder without siphon inside, turn it upside down and use it.

(We recommend manifold with sight glass.)

Caution Do not use a “CHARGE CYLINDER”.

Caution

As a rule, please collect all existing refrigerants in the system outside the system when the refrigerant leakage occurs by the system. After that, please fill new refrigerant of a regulated amount again.

DRY VACUUMING

•

If vacuum pump possible vacuuming until less than -100.7kpa.

• •

1. Running vacuum pump at both liquid and gas side for more than 1 hour and vacuuming until -100.7kpa.

2. After that keep the pressure -100.7kpa for 1 hour and confirm the vacuum gauge value not increasing.

3. If vacuum gauge value is increase, there is possibility of water inside the unit or there is any leakage.

10.3.3. Regarding handling

Handling the unit by hold the handle at compressor side and hold the basepan bottom at fan side.

10.3.4. Selecting the outdoor unit installation locations

•

Select location which satisfies the following condition, and then confirm with the customer that such a place is satisfactory

• •

before installing the outdoor unit.

1. There should be sufficient ventilation.

2. The outdoor unit should be sheltered as much as possible from rain and direct sunlight, and the air should be able to move around so that hot and cold air do not build up.

3. There should not be animals or plants near the air outlet which could be adversely affected by hot or cold air coming out from the unit.

4. The outlet air and operating noise should not be a nuisance to other occupants nearby.

5. The location should be able to withstand the full weight and vibration of the outdoor unit, and it should also be level and safe for the unit to be installed.

6. The intake and outlet should not be covered.

7. There should not be danger of flammable gas or corrosive gas leaks.

8. There should be as little back-ventilation (air blowing directly onto the fan) as possible. (If strong wind blows directly onto the fan, it may cause problems with normal operation.)

•

If you know which direction the prevailing wind comes from during the

• •

operating season, set the outdoor unit at a right-angle to this wind direction, or so that air outlet faces toward a wall or fence.

•

If there are obstructions near the outdoor unit and the wind direction is not

• •

constant, install an optional air guider.

9. Do not allow any obstacles near the outdoor unit which will interfere with air flow around the air intake and air outlet.

10. If installing in a location which is prone to snowfall, place the installation base as high as possible, and be sure to install a roof or enclosure which does not allow snow to accumulate.

11. Avoid installing the unit in places where petroleum products (such as machine oil), salinity, sulphurous, gases or high-frequency noise are present.

CS-F50DD2E5 CU-L50DBE8

12. Be sure to leave enough space around the outdoor unit to maintain proper performance and to allow access for routine maintenance.

•

Allow enough space from any obstacles as shown in Fig. 1.2 below in order to prevent short-circuits from occurring.

• •

(If installing more than one outdoor unit, make the necessary space available as outlined in 13.)

However, there should be at least 1 meter of free space above the unit.

•

The height of any obstacles at the air intake and outlet sides should not be greater than the height of the outdoor unit.

• •

13. If installing more than one outdoor unit, allow enough space around each unit as shown below.

Maintain sufficient space above the unit.

Values inside brackets indicate distances when installing the 4HP - 6HP.

•

The distance given above are the minimum distance required in order to maintain proper performance.

• •

Allow as much space as possible in order to get the best performance from the units.

10.3.5. Transporting and installing the outdoor unit

•

Transporting

• •

1. The outdoor unit should be transported in its original packaging as close to the installation location as possible.

2. If suspending the outdoor unit, use a rope or belt, and use cloth or wood as padding in order to avoid damaging the unit.

•

Installation

• •

1. Read the “Selecting the outdoor unit installation location ” section thoroughly before installing the outdoor unit.

2. If installing the unit to a concrete base or other solid base, use M10 or W3/8 bolts and nuts to secure the unit, and ensure that the unit is fully upright and level.

(The anchor bolt positions are shown in the diagram at the right side.)

In particular, install the unit at a distance from the neighbouring building which conforms to regulations specified by local noise emission regulation standards.

3. Do not install the outdoor unit to the building’s roof.

4. If there is a possibility that vibration may be transmitted to the rooms of the building, place rubber insulation between the unit and the installation surface.

5. Drain water will be discharged from the outdoor unit when operating the system in heating or defrosting modes. Select an installation location which will allow the water to drain away properly, or provide a drainage channel so that the water can drain away.

(If this is not done, the drain water may freeze during winter, or the water may spill down to areas underneath the installation location.)

CS-F50DD2E5 CU-L50DBE8

•

If a drain pipe needs to be installed, insert the accessory drain elbow into the mounting hole at the bottom of the outdoor unit,

• •

and connect a hose with an inside diameter of 15mm to this drain elbow.

(The hose is not supplied.)

If using the drain elbow, install the outdoor unit on a base which is at least 5cm high.

NOTE In cold regions (where the outdoor air temperature can drop to 0°C or below continuously for 2-3 days), the drain water may freeze,

and this may prevent the fan from operating. Do not use the drain elbow in such cases.

10.3.6. Connecting the pipes

•

Use a clean pipe which does not include water or dust for inside of piping.

• •

•

When cutting the refrigerant pipes, a piping cutter must be used. Before connecting the refrigerant pipes, blow nitrogen and

• •

blow off dust in the pipes.

(Never use tools which cause a lot of dust such as a saw and a magnet.)

•

When waxing replace nitrogen inside the piping after removing dirt and dust. (In order to prevent oxidization scale from forming

• •

inside the piping).

•

The refrigerant pipes are of particular importance.

• •

The installation work for refrigerant cycles in separate-type air conditioners must be carried out perfectly.

1. Refer to the table below for the pipe diameters equivalent lengths and indoor/outdoor unit difference of elevation.

Pipe diameter (mm) Equivalent length (m) Difference of elevation (m)

Liquid-side pipes Gas-side pipes

ø9.52 x 0.8 ø15.88 x 1.0 50 30

2. Local pipes can project in any of four directions.

•

Make holes in the pipe panels for the pipes to pass through.

• •

•

Be sure to install the pipe panels to prevent rain from getting inside the outdoor unit.

• •

[Removing the service panel].

(1)

Remove the two mounting screws.

(2)

Slide the service panel downward to release the pawls. After this, pull the service panel toward you to remove it.

3. Notes when connecting the refrigerant pipes.

•

Use clean copper, pipes with no water or dust on the insides.

• •

•

Use phosphorus-free, unjointed copper pipes for the refrigerant pipes.

• •

•

If it is necessary to cut the refrigerant pipes, be sure to use a pipe cutter, and use compressed nitrogen or an air blower to

• •

clean out any foreign particles from inside the pipe.

•

Be careful not to let any dust, foreign materials or water get inside the pipes during connection.

• •

•

If bending the pipes, allow as large a bending radius as possible. Do not flex the pipes any more than necessary.

• •

•

If joining pipe ends, do so before tightening the flare nut.

• •

•

Always blow the pipe end with nitrogen while joining pipe ends.

• •

(This will prevent any oxide scaling from occurring inside the pipe.)

•

If using long pipe lengths with several joined pipe ends, insert strainers inside the pipes. (Strainers are not supplie d.)

• •

•

When tightening the flare nuts, coat the flare (both inside surfaces) with a small amount of refrigerator oil, and screw in

• •

about 3-4 turns at first by hand.

•

Refer to the following table for the tightening torques. Be sure to use two spanners to tighten.

• •

(If the nuts are overtightened, it may cause the flares to break or leak.)

CS-F50DD2E5 CU-L50DBE8

4. After piping connection has been completed, make sure that the joint areas of the indoor and outdoor units are free from gas leakage by the use of nitrogen, etc.

5. Air purge within connection piping shall be carried out by evacuation.

6. Close the tube joining area with putty heat insulator (local supply) without any gap as shown in below figure.

(To prevent insects or small animal entering)

10.3.7. Heat insulation

Caution

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.

Liquid-side pipes Material that can withstand

Gas-side pipes 120°C or higher

10.3.8. Charging with refrigerant

•

At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 30m. If the

• •

equivalent pipe length used will be 30m or less, no additional charging will be necessary.

•

If the equivalent pipe length will be between 30 and 50m, charge with additional refrigerant according to the equivalent length

• •

given in the table below.

−

For standard type

− −

Additional charging amount Equivalent length

0.05 kg/m 50m

CS-F50DD2E5 CU-L50DBE8

•

Pump down operation

• •

−

Operate the pump down according to the following procedures.

− −

Procedure Notes

1. Confirm the valve on the liquid side and the gas side is surely open.

2. Press the PUMP DOWN switch on outdoor printed board for 1 second or more.

3. Shut the valve on the liquid side surely. When the valve is shut halfway, the compressor is occasionally

Perform the cooling operation for five minutes or more.

damaged.

10.3.9. Electrical wiring

Warning

Caution

Warning

•

Connect the power supply wiring and indoor/outdoor unit connection wiring according to the electrical circuit diagram

• •

The units must be connected to the supply cables for fixed wiring by qualified technician. Feed the power source to the unit via a distribution switch board designed for this purpose, the switch should disconnected all poles with a contact separation of at least 3mm. When the supply cable is damaged, it must be replaced by qualified technician.

Be sure to install a current leakage breaker, main switch and fuse to the main power supply, otherwise electric shocks may result.

Be sure to connect the unit to secure earth connection. If the earthing work is not carried out properly, electric shocks may result.

Wiring shall be connected securely by using specified cables and fix them securely so that external force of the cables may not transfer to the terminal connection section. Imperfect connection and fixing leads to fire, etc.

instructions.

•

Clamp the wires securely to the terminal connections using cord clamps so that no undue force is placed on the wires.

• •

•

Once all wiring work has been completed, tie the wires and cords together with the binding strap so that they do not touch other

• •

parts such as the compressor and pipes.

1. Connect the power supply line to a 3-phase/380-415V (or single-phase 220240V) power supply.

2. The equipment shall be connected to a suitable mains network with a main impedance less than the valve indicated in the table of power supply specifications.

3. Be sure to connect the wires correctly to terminal board with connecting the crimp type ring terminal to the wires.

4. The binding screws inside the power supply box may become loosened due to vibration during transportation, so check that they are tightened securely.

5. Tighten the binding screws to the specified torque while referring to the table below.

6. If connecting two separate wires to a single crimped terminal, place the two crimped terminal wires together as shown in Fig. A. (If the arrangement shown in Fig. B is used, poor contacts or contact damage may result.)

7. If momentarily turning on the power supply for both the indoor and outdoor units, do not turn the power off again until at least 1 minute has passed (except when a reversed phase has been detected).

Warning

Terminal screw Tightening torque N.cm {kgf.cm}

Use only the specified cables for wiring connections. Connect the cable securely, and secure them properly so that no undue force will be applied to the terminal connections. If the terminals are loose or if the wires are not connected securely, fire may result.

M3 69 ~ 98 {7 ~ 10} M4 157 ~ 196 {16 ~ 20} M5 196 ~ 245 {20 ~ 25}

CS-F50DD2E5 CU-L50DBE8

Earth lead wire shall be longer than other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from the anchorage.

•

Power supply specifications

• •

Model name Leakage

current

breaker

(A) CU-L24DB*** 220V-240V~ 30 30 20 CU-L28DB*** 220V-240V~ 30 30 20 14 0.1

Circuit breaker

(Minimum Capacity)

Switch

(A)

Fuse

(A)

Minimum

power

supply cables

4mm

4mm cable

based on

length (m)

14 0.1

permissible impedance

CU-L34DB*** 220V-240V~ 40 40 30 9 0.05 CU-L43DB*** 220V-240V~ 40 40 40 8 0.05 CU-L50DB*** 380V-415V 3N~ 30 30 30 11 0.02

NOTE

1. Where ground work (earth) is carried out, do not connect the ground return to the gas pipe, water line pipe, grounded circuit of the telephone and lightning rod, or ground circuit of other product in which earth leakage breaker is incorporated. (Such action is prohibited by statute, etc.)

Make sure the indoor and outdoor connection wires are detangled. (There might be effect to received outside noise.)

2. Use the standard power supply cables for Europe (such as H05RN-F or H07RN-F which conforms to CENELEC (HAR) rating specifications) or use the cables based on IEC standard. (245IEC57, 245IEC66)

3. Select the particular size of electrical wire for power supply cables in accordance with the standards of the given nation and region.

Maximum

(Ω)

Indoor/outdoor

unit connection

power cables

(terminals

2.5 mm2×3

, , , )

CS-F50DD2E5 CU-L50DBE8

10.3.10. Connecting power supply cables

CAUTION

•

For three phase model, never operate the unit by pressing the electromagnetic switch.

• •

•

Never correct the phase by switching over any of the wires inside the unit.

• •

10.3.11. Precautions with regard to test operation

CAUTION

•

Always be sure to use a properly-insulated tool to operate the switch on the circuit board. (Do not

• •

use your finger or a metallic object.)

•

Never turn on the power supply until all installation work has been completed.

• •

•

Turn on the circuit breaker 12 hours or more before a test run. (By supplying power to crankcase

• •

heater, compressor is warmed and liquid compressing is prevented.)

•

Check that the voltage is 90% of rated voltage or higher when starting the unit.

• •

(The unit will not operate if the voltage is less than 90% of rated voltage.)

•

Test operation can be carried out using the remote control unit or by using the switch on the

• •

printed circuit board inside the outdoor unit.

If carrying out test operation at the printed circuit board of the outdoor unit, follow the procedure given below. (If using the remote control unit to carry out test operation, refer to the installation manual which is supplied with the indoor unit.)

•

Press the COOL or HEAT switch for 1 second or more.

• •

(Be sure to select cooling mode first, and run the units in this mode for 5 minutes or more.)

•

Press the TEST button once more to cancel test operation mode.

• •

•

When performing heating test operation when the outside temperature is high, or cooling test

• •

operation when the outside temperature is low, the protection circuits may sometimes operate within a few minutes.