20. During pump down operation, stop the compressor before remove the refrigerant piping. (Removal of refrigeration piping while compressor is operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.). 21. After completion of installation or service, confirm there is no leakage or refrigerant gas. It may generate toxic gas when the refrigerant contacts with fire. 22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when refrigerant contacts with fire. 23. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.
24. Must not use other parts except original parts describe in catalog and manual.
CAUTION 1. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire. 2. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture. 3. Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the flare may break and cause refrigerant gas leakage. 4. Do not touch outdoor unit air inlet and aluminium fin. It may cause injury.
5. Select an installation location which is easy for maintenance. 6. Pb free solder has a higher melting point than standard solder; typically the melting point is 50F 70F (30C 40C) higher. Please use a high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 20F (370 10C). Pb free solder will tend to splash when heated too high (about 1100F / 600C). 7. Power supply connection to the air conditioner. Connect the power supply cord of the air conditioner to the mains using one of the following methods. Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency. In some countries, permanent connection of this room air conditioner to the power supply is prohibited. i. Power supply connection to the receptacle using a power plug. Use an approved 15/16A (1.0 ~ 1.75HP) or 16A (2.0HP) or 20A (2.5HP) power plug with earth pin for the connection to the socket. ii. Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A (1.0 ~ 2.0HP) or 20A (2.5HP) circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.0 mm contact gap. 8. Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigerant parts. Take care of the liquid refrigerant, it may cause frostbite. 9. Installation or servicing work: It may need two people to carry out the installation or servicing work. 10. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc. 11. Do not sit or step on the unit, you may fall down accidentally. 12. Do not touch the sharp aluminium fin, sharp parts may cause injury.

2 Specifications

2.1. CU-3E18JBE
Item Indoor Unit Combination Power Source Capacity Electrical Power Input Data EER Noise Capacity Running Current Electrical Power Input Data COP Noise Maximum Current Starting Current Circuit Breaker Capacity Height Dimension Net Weight Connection Cable Pipe Length Range (1 room) Maximum Pipe Length (Total Room) Refrigerant Pipe Diameter Liquid Side Gas Side Type Compressor Motor Type Rated Output Type Air Circulation Fan Speed Motor Type Rated Output High Type Tube Material Heat Exchanger Fin Material Row/Stage FPI Air Volume Refrigerant Control Device Refrigerant Oil Refrigerant (R410A) Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum g Dry Bulb Cooling Indoor Operation Range Heating Cooling Outdoor Operation Range Heating 46 --15 High m3/min W RPM W m m mm mm Width Depth Sound Pressure Level Sound Power Level Running Current kW A kW W/W dB-A dB kW A kW W/W dB-A dB A A A mm mm mm kg Unit OUTDOOR UNIT 2.2kW + 2.8kW + 4.0kW 1 Phase, 230V, 50Hz (Power supply from outdoor unit) 5.2 (1.8 ~ 7.3) 5.3 1.20 (0.36 ~ 2.18) 4.33 (5.00 ~ 3.35) 6.8 (1.6 ~ 8.3) 6.5 1.40 (0.32 ~ 2.11) 4.86 (5.00 ~ 3.93) 15.2 6.(+95) 3 + 1 (Earth) 1.5 mm~ 6.35 9.52 Scroll Type DC Brushless (4-poles) 1.30k Propeller Fan DC Brushless (8-poles) Plate fin configuration forced draft type Copper Aluminum 2/41.7 Expansion Valve POE (RB-68A) 2640 Wet Bulb -16

Cooling Operation

Sound Pressure Level Sound Power Level

Heating Operation

Note Specifications are subject to change without notice for further improvement.
Multi split combination possibility: - A single outdoor unit enables air conditioning of up to three separate rooms for CU-3E18JBE.
Outdoor Unit CU-3E18JBE A 2.2 kW CS-E7JKEW, CS-E7JKEW-3, CS-XE7JKEW, CS-ME7EB1E, CS-E7JKDW CS-E9JKEW, CS-E9JKEW-3, CS-CE9JKEW, CS-XE9JKEW, CS-ME10EB1E, CS-E10JD3EA, CS-ME10DTEG, CS-E10HB4EA, CS-E9GFEW, CS-E9GFEW-2, CS-E9JKDW, CS-XE9JKDW CS-E12JKEW, CS-E12JKEW-3, CS-CE12JKEW, CS-XE12JKEW, CS-ME12EB1E, CS-E12GFEW, CS-E12GFEW-2, CS-E12JKDW, CS-XE12JKDW CS-E15JKEW, CS-XE15JKEW, CS-ME14EB1E, CS-E15JD3EA, CS-E15DTEW, CS-E15HB4EA, CS-E15JKDW CS-E18JKEW, CS-XE18JKEW, CS-E18JD3EA, CS-E18DTEW, CS-E18HB4EA, CS-E18GFEW, CS-E18GFEW-2, CS-E18JKDW, CS-XE18JKDW From 5.0 kW to 9.0 kW 20 Note: : Available Remarks for CU-3E18JBE 1. At least two indoor units must be connected. 2. The total nominal cooling capacity of indoor untis that will be connected to outdoor unit must be within connectable capacity range of indoor unit. (as shown in the table above) Example: The indoor units combination below is possible to connect to CU-3E18JBE. (Total nominal capacity of indoor units is between 5.0 kW to 9.0 kW) 1) Two CS-E9JKEW only. (Total nominal cooling capacity is 5.6 kW) 2) One CS-E7JKEW and Two CS-E12JKEW. (Total nominal cooling capacity is 8.6 kW) B C

Input Power (kW) Rating 0.74 1.05 1.23 1.72 2.10 1.45 1.72 1.84 1.80 1.52 1.93 1.84 1.80 1.52 1.75 1.75 1.50 1.71 1.50 1.51 1.51 1.47 1.44 1.51 1.47 1.40 1.41 1.51 1.47 Min - Max 0.30 - 1.23 0.30 - 1.23 0.30 - 2.10 0.30 - 2.93 0.30 - 2.52 0.31 - 2.55 0.31 - 2.55 0.31 - 2.52 0.31 - 2.51 0.31 - 2.20 0.31 - 2.55 0.31 - 2.52 0.31 - 2.51 0.31 - 2.20 0.31 - 2.49 0.31 - 2.47 0.31 - 2.18 0.31 - 2.47 0.31 - 2.17 0.32 - 2.12 0.32 - 2.12 0.32 - 2.11 0.32 - 2.11 0.32 - 2.12 0.32 - 2.11 0.32 - 2.11 0.32 - 2.10 0.32 - 2.12 0.32 - 2.11
Current (A) 230V 3.7 5.0 5.8 7.7 9.2 6.4 7.6 8.2 7.9 6.7 8.5 8.1 8.0 6.7 7.7 7.8 6.6 7.5 6.6 6.7 6.7 6.5 6.4 6.7 6.5 6.5 6.3 6.7 6.5

Heating

5.80 6.40 6.80 6.80 6.80 6.80 6.80 6.80 6.80 6.80 6.80 6.80 6.80 6.80
6.78 6.80 6.80 6.80 6.80 6.80 6.80 6.80 6.78 6.80

CU-4E23JBE

Item Unit OUTDOOR UNIT 2.2kW + 2.8kW + 2.8kW + 3.2kW 1 Phase, 230V, 50Hz (Power supply from outdoor unit) Capacity Running Current Electrical Power Input Data EER Noise Capacity Running Current Electrical Power Input Data COP Noise Sound Pressure Level Sound Power Level Sound Pressure Level Sound Power Level kW A kW W/W dB-A dB kW A kW W/W dB-A dB A A A Height mm mm mm kg m m mm mm Liquid Side Gas Side Type Motor Type Rated Output Type W Width Depth 6.8 (1.9 ~ 8.8) 7.5 1.68 (0.34 ~ 2.47) 4.05 (5.59 ~ 3.56) 8.6 (3.0 ~ 10.6) 8.6 1.85 (0.58 ~ 2.60) 4.65 (5.17 ~ 4.08) 15.6 8.(+95) 3 + 1 (Earth) 1.5 mm~ 6.35 9.52 Scroll Type DC Brushless (4-poles) 1.30k Propeller Fan DC Brushless (8-poles) W RPM / 620 Plate fin configuration forced draft type Copper Aluminum 2/m3/min 42.5 / 44.1 Expansion Valve POE (RB-68A) g Dry Bulb Cooling Maximum Minimum Maximum Minimum Maximum Minimum Maximum Minimum 46 --Wet Bulb -16
Indoor Unit Combination Power Source
Maximum Current Starting Current Circuit Breaker Capacity Dimension Net Weight Connection Cable Pipe Length Range (1 room) Maximum Pipe Length (Total Room) Refrigerant Pipe Diameter

Compressor

Air Circulation Fan Speed
Motor Type Rated Output High (Cooling / Heating) Type Tube Material

Heat Exchanger

Fin Material Row/Stage FPI
Air Volume Refrigerant Control Device Refrigerant Oil Refrigerant (R410A)

High (Cooling / Heating)

Indoor Operation Range Heating Cooling Outdoor Operation Range Heating
Multi split combination possibility: - A single outdoor unit enables air conditioning of up to four separate rooms for CU-4E23JBE.
Outdoor Unit CU-4E23JBE A 2.2 kW CS-E7JKEW, CS-E7JKEW-3, CS-XE7JKEW, CS-ME7EB1E, CS-E7JKDW CS-E9JKEW, CS-E9JKEW-3, CS-CE9JKEW, CS-XE9JKEW, CS-ME10EB1E, CS-E10JD3EA, CS-ME10DTEG, CS-E10HB4EA, CS-E9GFEW, CS-E9GFEW-2, CS-E9JKDW, CS-XE9JKDW CS-E12JKEW, CS-E12JKEW-3, CS-CE12JKEW, CS-XE12JKEW, CS-ME12EB1E, CS-E12GFEW, CS-E12GFEW-2, CS-E12JKDW, CS-XE12JKDW CS-E15JKEW, CS-XE15JKEW, CS-ME14EB1E, CS-E15JD3EA, CS-E15DTEW, CS-E15HB4EA, CS-E15JKDW CS-E18JKEW, CS-XE18JKEW, CS-E18JD3EA, CS-E18DTEW, CS-E18HB4EA, CS-E18GFEW, CS-E18GFEW-2, CS-E18JKDW, CS-XE18JKDW CS-E21JKEW, CS-XE21JKEW, CS-E21JD3EA, CS-E21JB4EA, CS-E21JKDW From 5.0 kW to 11.0 kW 20 Note: : Available Remarks for CU-4E23JBE 1. At least two indoor units must be connected. 2. The total nominal cooling capacity of indoor untis that will be connected to outdoor unit must be within connectable capacity range of indoor unit. (as shown in the table above) Example: The indoor units combination below is possible to connect to CU-4E23JBE. (Total nominal capacity of indoor units is between 5.0 kW to 11.0 kW) 1) Two CS-E9JKEW only. (Total nominal cooling capacity is 5.6 kW) 2) One CS-E7JKEW and Two CS-E12JKEW. (Total nominal cooling capacity is 8.6 kW) B C D

Input Power (kW) Rating 0.74 1.05 1.23 1.72 2.10 2.40 1.45 1.72 1.84 2.21 2.14 2.29 2.12 2.28 2.32 2.14 2.14 2.27 2.27 2.09 2.09 2.26 2.08 2.08 1.96 1.96 2.09 2.09 2.07 2.06 1.93 1.93 2.09 2.07 2.06 1.93 1.93 2.05 2.04 1.91 2.03 2.09 2.07 2.06 1.93 2.05 2.04 1.91 2.03 1.99 1.98 Min - Max 0.30 - 1.23 0.30 - 1.23 0.30 - 2.10 0.30 - 2.93 0.30 - 2.52 0.62 - 2.53 0.61 - 2.80 0.61 - 2.80 0.59 - 2.80 0.59 - 2.80 0.53 - 2.76 0.53 - 2.76 0.61 - 2.80 0.59 - 2.80 0.59 - 2.80 0.53 - 2.76 0.53 - 2.76 0.58 - 2.80 0.57 - 2.80 0.52 - 2.74 0.52 - 2.74 0.56 - 2.80 0.51 - 2.74 0.51 - 2.74 0.48 - 2.65 0.48 - 2.65 0.60 - 2.84 0.60 - 2.84 0.59 - 2.82 0.59 - 2.81 0.57 - 2.71 0.57 - 2.71 0.60 - 2.84 0.59 - 2.82 0.59 - 2.81 0.57 - 2.71 0.57 - 2.71 0.59 - 2.80 0.58 - 2.79 0.57 - 2.68 0.58 - 2.78 0.60 - 2.84 0.59 - 2.82 0.59 - 2.81 0.57 - 2.71 0.59 - 2.80 0.58 - 2.79 0.57 - 2.68 0.58 - 2.78 0.58 - 2.77 0.58 - 2.76
Current (A) 230V 3.7 5.2 6.0 8.0 9.7 11.1 6.7 8.0 8.5 10.2 9.9 10.6 9.8 10.5 10.7 9.9 9.9 10.5 10.5 9.7 9.7 10.5 9.6 9.6 9.1 9.1 9.7 9.7 9.6 9.5 8.9 8.9 9.7 9.6 9.5 8.9 8.9 9.5 9.4 8.8 9.4 9.7 9.6 9.5 8.9 9.5 9.4 8.8 9.4 9.2 9.2
5.80 6.40 7.00 8.20 8.60 8.60 8.00 8.50 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60
8.58 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.58 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.58 8.60
Indoor unit combination Operation Four-room Operation Class (kW) 2.2 + 2.2 + 2.2 + 2.2 2.2 + 2.2 + 2.2 + 2.8 2.2 + 2.2 + 2.2 + 3.2 2.2 + 2.2 + 2.2 + 4.0 2.2 + 2.2 + 2.8 + 2.8 2.2 + 2.2 + 2.8 + 3.2 2.2 + 2.2 + 3.2 + 3.2 2.2 + 2.8 + 2.8 + 2.8 2.2 + 2.8 + 2.8 + 3.2
Heating Capacity (kW) Rating 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 8.60 Min - Max 3.1 - 10.6 3.1 - 10.6 3.0 - 10.6 3.0 - 10.6 3.1 - 10.6 3.0 - 10.6 3.0 - 10.6 3.1 - 10.6 3.0 - 10.6
Input Power (kW) Rating 1.87 1.87 1.85 1.84 1.87 1.85 1.83 1.87 1.85 Min - Max 0.58 - 2.62 0.58 - 2.62 0.58 - 2.60 0.59 - 2.59 0.58 - 2.62 0.58 - 2.60 0.59 - 2.57 0.58 - 2.62 0.58 - 2.60
Current (A) 230V 8.6 8.6 8.6 8.5 8.6 8.6 8.5 8.6 8.6

3 Dimensions

4 Refrigeration Cycle Diagram

4.1. CU-3E18JBE

Remove the control board cover (resin) from the unit by loosening three screws Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (locate at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
Piping size 1/4 [6.35 Nm] 3/8 [9.52 Nm] 1/2 [12.7 Nm] 5/8 [15.88 Nm] 3/4 [19.05 Nm] Torque [18 Nm (1.8 kgf.m)] [42 Nm (4.3 kgf.m)] [55 Nm (5.6 kgf.m)] [65 Nm (6.6 kgf.m)] [100 Nm (10.2 kgf.m)]
Do not over tighten, over tightening cause gas leakage.
CUTTING AND FLARING THE PIPING 1. Please cut using pipe cutter and then remove the burrs. 2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3. Please make flare after inserting the flare nut onto the copper pipes.
10.4. Evacuation Of The Equipment
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the gas side 3-way valve. Be sure to connect the end of the charging hose with the push pin to the service port. 2. Connect the center hose of the charging set to a vacuum pump. 3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes. 4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not move after approximately five minutes. Note : BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE. 5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve. 6. Tighten the service port caps of gas side 3-way valve at a torque of 18 Nm with a torque wrench. 7. Remove the valve caps of both of the gas side and liquid side 3-way valve. Position both of the valves to OPEN using a hexagonal wrench (4 mm). 8. Mount valve caps onto the gas side and liquid side of the 3-way valve. Be sure to check for gas leakages.
If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step -
above take the following measure:.
If the leak stops when the piping connections are tightened further, continue working from step If the leak does not stop when the connections are retightened, repair the location of leak. Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite.

To improve the judgment accuracy during annual cooling control, outdoor ambient temperature sampling for 2 minutes will be activated every 35 minutes under designated fan speed. Control stop conditions: - When either one of the start conditions are not complied.

11.2. Heating Operation

11.2.1. Outdoor fan control
When heating operation is enabled, based on outdoor ambient temperature, fan motor control will be adjusted according to figure below:
To improve the judgment accuracy, indoor room temperature sampling starts when any indoor unit has stopped capability supplied (heating thermo-off) during heating operation with compressor ON, outdoor unit will send signal to all thermo-off indoor units to ON fan motor and get room temperature sample. To prevent discharge temperature drop at indoor units which is ON when sampling the room temperature of heating thermo-off units, the outdoor fan speed will be adjusted accordingly. However, if indoor room temperature is high compare to remote control setting temperature, sampling of corresponding indoor unit will be cancelled.

11.2.2.

Powerful Operation 1
During cooling operation, this control is to concentrate outdoor unit capability to the powerful operation enabled indoor unit by temporary stop the capability supply to low load demand indoor units. Operation start condition: - Powerful operation ON for targeted indoor unit Operation content: - If other indoor units (where Powerful operation are OFF) achieve setting temperature continuously for 1 minutes after received powerful command from indoor unit, then capability supply to other indoor units are stopped for minimum 3 minutes. Capability supply stop period follows powerful operation period. Operation stops when comply either one of the following conditions: - When other indoor units (where Powerful operation are OFF) is lower than setting temperature. - When the powerful operation is OFF for all indoor units. - When Quiet operation received from 1 indoor unit. - When protection control starts.

11.2.3.

Powerful Operation 2
During cooling / heating operation, this control is to provide fast cooling / heating operation compare to normal operation. Operation start if all condition below are complied: - Powerful operation ON for indoor unit. - Not under Annual Cooling control. Operation content: - Outdoor fan speed will adjust automatically. - Compressor frequency will adjust automatically. Operation stop when comply either one of the follow conditions: - When the powerful operation is OFF for all indoor units. - When annual cooling control activated.

12 Simultaneous Operation Control
1. Operation modes which can be selected using the remote control unit: Automatic, Cooling, Soft Dry, Heating, e-ion operation mode. 2. Types of operations modes which can be performed simultaneously Cooling operation and cooling, Soft Dry or e-ion operation Heating operation and heating operation 3. Types of operation modes which cannot be performed simultaneously While a cooling operation is in progress, a heating operation cannot be performed by an indoor unit in another room. In the room where the operation button for cooling was pressed first, the operation is continued. In the room where the operation button for heating was pressed afterward, the operation lamp of the indoor unit blinks, where the attempt is made to establish the heating operation. Its fan is stopped, and the air does not discharged. While a heating operation is in progress, a cooling operation cannot be performed by an indoor unit in another room. In the room where the operation button for heating was pressed first, the operation is continued. In the room where the operation button for cooling was pressed afterward, the operation lamp of the indoor unit blinks, where the attempt is made to establish the cooling operation. Its fan is stopped, and the air does not discharged. 4. Operation mode priority control The operation mode designated first by the indoor unit has priority. If the priority indoor unit stops operation or initiates the e-ion operation, the priority is transferred to other indoor units.

13 Protection Control

13.1. Freeze Prevention control (Cool)
When received freeze prevention signal from indoor unit, the compressor frequency changes according to indoor heat exchanger temperature. When indoor unit request capability OFF due to freeze condition , immediately the capability supply to targeted indoor unit stops.
13.2. Dew Prevention control (Cool)
When received dew prevention signal from indoor unit, the compressor frequency changes according to indoor intake temperature and indoor heat exchanger temperature.
13.3. Electronic Parts Temperature Rise Protection 1 (Cool)
This control prevents electronic parts temperature rise during cooling overload condition. Start conditions: - Outdoor ambient temperature is at protection region as shown in figure below:
- Outdoor unit total current is above 5.5A Control content - Outdoor fan speed is adjusted accordingly. Control stop condition - When outdoor ambient temperature is back to normal region. During this control, outdoor fan speed does not reduce for Quiet operation.
13.4. Electronic Parts Temperature Rise Protection 2 (Cool)
This control prevents electronic parts temperature rise during cooling/dry operation. Start conditions: - Total current is at protection region as shown in figure below:

Operation Mode Cooling/Soft Dry (A) Cooling/Soft Dry (B) Heating Hi Lo Hi Lo Hi Lo CU-4E23JBE X (A) 14.0 9.8 14.0 9.8 14.0 9.8 Y (A) 17.5 17.5 17.5 17.5 17.5 17.5 X (A) 14.0 9.8 14.0 9.8 14.0 9.8 CU-3E18JBE Y (A) 17.5 17.5 17.5 17.5 17.5 17.5
13.12. IPM (power transistor) Protection Control
Overheating Prevention Control - If IPM temperature rises to 80C, outdoor fan speed will be increased. - When the IPM temperature rises to 95C, compressor operation will stop immediately. - Compressor operation restarts when temperature decreases to 90C. - If IPM temperature detected less than -30C, IPM is judged as open circuit (F96 is indicated). DC peak current control - When IPM DC current exceeds set value of 30.0 3.0 A, the compressor will stop. - If the DC peak current detected within 30 seconds after operation starts, compressor will restart after 1 minute. - If the DC peak current detected 30 seconds or more after operation starts, compressor will restart after 2 minute. - Within 30 seconds after compressor restarts, if the DC peak current is exceeded set value continuously for 7 times, all indoor and outdoor relays will be cut off (F99 is indicated). Error reset can be done by power supply reset.
13.13. Compressor Protection Control (Gas leak detection control 1)
Control start conditions - For 5 minutes, the compressor continuously operates and total current is low. - During Cooling or Soft Dry operation: Indoor intake temperature indoor piping temperature is below 4C. - During Heating operation: Indoor pipe temperature indoor intake temperature is below 3C. - Not during deice control. - Compressor ON with maximum frequency. Control content - Compressor stops (and restart after 3 minutes) - If the conditions above happen 4 times within 60 minutes, the unit will stop operation (F91 is indicated).
13.14. Compressor Protection Control (Gas leak detection control 2)
This control detect gas leakage condition to prevent compressor damage. Control start condition - All connected indoor units capability supply ON. - Compressor ON with maximum frequency. - Not during annual cooling. - Compressor discharge temperature high. Control content - Compressor OFF during this control (F91 is memorized in EEPROM) - If the above conditions happen 2 times within 60 minutes, indoor units Timer LED will blinks (F91 is indicated at all indoor units)
13.15. Valve close detection control
This control detects 3-way valve close condition to prevent damage to refrigerant cycle. Start conditions: - For all connected indoor units, if Indoor intake temperature indoor piping temperature are between -2C and 2C continuously for 5 minutes after compressor ON at first cooling operation. - The first cooling operation is defined as cooling operation is ON for less than 8 minutes after new installation or after pump down. Control content - During this control, compressor stop, indoor units Timer LED will blink. (F91 is indicated at indoor units) Error reset can be done by power supply reset or reset by using remote control.

LED Room 2 A 3 B 4 C 5 D 6 Automatic correction impossible Wiring check in progress Automatic correction completed Unit has abnormality (NOTE 4) Message
All flashing Status LED2, 4, 6 and LED 3, 5 alternatively flashing Flashing one after another Other than above
If automatic correct is impossible, check the indoor unit wiring and piping manually.
NOTE: 1. For two rooms connection, LED 4 and 5 are not illuminated and for three rooms connections, LED 5 is not illuminated after wiring operation complete. 2. If the outdoor air temperature is less than 5C or unit has abnormality, wiring operation will not start. 3. After wiring check operation is complete, LED indication will illuminated until normal operation starts. 4. Follow the product diagnosis procedure. 5. When LED 1 only illuminate, indicates that outdoor unit is operating normally.

14.1.4. Power Save Mode

Power Save Mode can be enabled by pushing POWER SAVE switch (SW4) to ON before power supply ON. When Power Save Mode is ON, the unit can be operate at lower running current where the breaker capacity not achieve the requirement.
14.1.5. Mode priority function
Mode priority function can be enabled by pushing MODE PRIORITY switch (SW5) to ON before power supply ON. When Mode Priority Function is ON, the mode priority is given to higher capacity indoor units.
14.1.6. Cooling only function
The unit capable to limit the operation mode to Cooling Mode only (Heating mode disabled) by cutting JP1 (COOL ONLY) before power supply ON. This function prevent wrong operation during the unit installed in server room. This function could be disabled again by short the JP1 (COOL ONLY) before power supply ON.

15 Troubleshooting Guide

15.1. Self Diagnosis Function
The display screen of wireless remote control unit and the self-diagnosis LEDs (green) on the outdoor printed circuit board in the outdoor unit can be used to identify the location of the problem. Refer to the table below to identify and solve the cause of the problem, and then re-start the air conditioner system. If the problem is solved and operation returns to normal. LED 1 illuminates and others LED are off.
Diagnosis Abnormality display or Abnormality LED 6 LED 5 LED 4 LED 3 LED 2 LED 1 protection judgement control

Protection operation

Problem

Check location

Indoor/outdoor abnormal communication
After operation for 1 minute

2 times happen within 30 minutes
Indoor high pressure protection (Heating)
Indoor operating unit freeze protection 4-way valve switching abnormality Indoor standby units freezing abnormality
Indoor freeze protection (Cooling)
4 times happen within 30 minutes 3 times happen within 40 minutes
4-way valve switching abnormal Wrong wiring and connecting pipe, expansion valve leakage, indoor heat exchanger sensor open circuit
Power factor correction (PFC) circuit protection Refrigeration cycle abnormality Compressor abnormal revolution Compressor discharge pressure overshoot protection Outdoor cooling high pressure protection
4 times happen within 10 minutes 2 times happen within 20 minutes 4 times happen within 20 minutes 4 times happen within 30 minutes
Power factor correction circuit abnormal Refrigeration cycle abnormal Compressor abnormal revolution Compressor discharge pressure overshoot
Insufficient refrigerant or valve close Power transistor module faulty or compressor lock Check refrigeration system
4 times happen within 20 minutes
Cooling high pressure protection
Check refrigeration system Outdoor air circuit
Power transistor module overheating protection Compressor overheating protection Total running current protection
4 times happen within 30 minutes
Power transistor module overheat
PCB faulty Outdoor air circuit (fan motor)
3 times happen within 30 minutes 3 times happen within 20 minutes
Compressor overheat Total current protection
Insufficient refrigerant Check refrigeration system Power source or compressor lock Power transistor module faulty or compressor lock
Outdoor direct current (DC) peak detection
Continuous happen for 7 times
Power transistor module current protection
LED 1 illuminate is indicated that outdoor unit is operating normally. If the LED 1 is switched off or flashing, check the power supply and self-diagnosis indication.
------ Illuminate ------ Flashing Blank ------ OFF
16 Disassembly and Assembly Instructions
High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks.

16.1. Outdoor Unit Removal Procedure
Caution! When handling electronic controller, be careful of electrostatic discharge.
16.1.1. Removing the Cabinet Top Plate and Cabinet Front Plate
1. Remove the cabinet top plate (remove the 8 screws). 2. Remove the 8 screws (1 on the center, 3 at the top and 4 at the bottom) securing the cabinet front plate, release the 2 hooks (1 each at the left and right), and pull the cabinet front plate toward front side.
16.1.2. Remove the Control Board Cover and Particular Plates
3. Remove the control board cover (remove 3 screw). 4. Remove the particular plate (remove 2 screw). 5. Remove the particular plate (remove 2 screw).
16.1.3. Removing the Control P.C. Board
6. Remove the drip proof cover. 7. Disconnect the connectors (lead wires of the compressor, sensor, and others). 8. Remove the screw at the right side of the control box, and pull out the entire control box. 9. Release the control P.C. Board tab to remove the control P.C. Board.
16.1.4. Removing the Propeller Fan and Fan Motor
1. Follow the steps in 17.2.1 for removing the cabinet top plate and cabinet front plate. 2. Remove the propeller fan by removing the nut turning clockwise at its center.
3. Disconnect the fan motor connector from the control P.C. Board. 4. Loosen the 4 fan motor mounting screws then remove the fan motor.

17 Technical Data

17.1. Operation Characteristics (CU-3E18JBE)
17.1.1. One Indoor Unit Operation
17.1.2. Two Indoor Unit Operation
17.1.3. Three Indoor Unit Operation
17.2. Operation Characteristics (CU-4E23JBE)
17.2.1. One Indoor Unit Operation
17.2.2. Two Indoor Unit Operation
17.2.3. Three Indoor Unit Operation
17.2.4. Four Indoor Unit Operation
18 Exploded View and Replacement Parts List

18.1. CU-3E18JBE

Note The above exploded view is for the purpose of parts disassembly and replacement. The non-numbered parts are not kept as standard service parts.

18.2. CU-4E23JBE

REF. NO. 51
PART NAME & DESCRIPTION CHASSY ASSY SOUND PROOF BOARD FAN MOTOR BRACKET SCREW-BRACKET FAN MOTOR CONDENSER COMPLETE FAN MOTOR SCREW-FAN MOTOR MOUNT PROPELLER FAN ASSY NUT COMPRESSOR PACKING BUSHING - COMPRESSOR MOUNT NUT-COMPRESSOR MOUNT CRANKCASE HEATER TUBE ASS'Y (CAPILLARY TUBE) ACCUMLATOR 3-WAY VALVE (LIQUID) 3-WAY VALVE (GAS) HOLDER COUPLING STRAINER STRAINER EXPANTION VALVE 4-WAYS VALVE DISCHARGE MUFFLER HEATING PRESSURE SWITCH FLARE NUT (1/4) FLARE NUT (3/8) SOUND PROOF MATERIAL SOUND PROOF MATERIAL SOUND PROOF MATERIAL SOUND PROOF MATERIAL SENSOR-COMPLETE (COMP. DISC.) V-COIL COMPLETE (4 WAY VALVE) V-COIL COMPLETE (EXPAND VALVE-WHITE) V-COIL COMPLETE (EXPAND VALVE-YELLOW) V-COIL COMPLETE (EXPAND VALVE-BLUE) V-COIL COMPLETE (EXPAND VALVE-RED) SENSOR-COMPLETE (DEF.) SENSOR-COMPLETE (OUTLET TEMP SENSOR) SENSOR-COMPLETE (CN-TH4) SENSOR-COMPLETE (CN-TH3) HOLDER-SENSOR ELECTRONIC CONTROLLER-MAIN ELECTRONIC CONTROLLER (NOISE FILTER) ELECTRONIC CONTROLLER (DISPLAY) LEAD WIRE-COMPRESSOR REACTOR TERMINAL BOARD ASS'Y (L,N) TERMINAL BOARD ASS'Y (1,2,3) CONTROL BOARD COVER (TOP PCB) CONTROL BOARD CASING
QTY. 3/4 3/3/4 3/1 4/1 3/1
CU-3E18JBE CWD52K1212 CWH151194 CWD541127 CWH551217 CWB32C2680 EHDS80C60AC CWH551016J CWH00K1006 CWH561051 5KD184XAB21 CWB81043 CWH50055 CWH561049 CWA341047 CWT01C4955 CWB131050 CWB011601 CWB011602 CWH351141 CWB11061 CWB111024 CWB051029 CWB001026J CWB121014 CWA101007 CWT251030 CWT251031 CWG302246 CWG302520 CWG302521 CWG302522 CWA50C2515 CWA43C2169J CWA43C2334 CWA43C2335 CWA43C2336 CWA50C2625 CWA50C2517 CWA50C2620 CWA50C2622 CWH32074 CWA73C3817R CWA745291 CWA745292 CWA67C7213 G0C403J00001 CWA28K1195 CWA28K1196 CWH131333 CWH102385
CU-4E23JBE CWA43C2338 CWA50C2616 CWA50C2617 CWA73C3815R CWH102384

REMARKS

O O O O

O O O O O O O O O O

REF. NO. 72 73
PART NAME & DESCRIPTION CABINET TOP PLATE CONTROL BOARD COVER CABINET FRONT PLATE CABINET SIDE PLATE (L) CABINET SIDE PLATE (R) WIRE NET HANDLE SOUND PROOF MATERIAL INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION INSTALLATION INSTRUCTION ACCESSORY CO. (DRAIN ELBOW)

QTY. 1 1

CU-3E18JBE CWE031083A CWH13C1194 CWE06K1065 CWE041317A CWE041395A CWD041128A CWE161010 CWG302528 CWF613964 CWF613984 CWF613985 CWF613986 CWF613987 CWF613988 CWF613989 CWF613990 CWF613991 CWF613992 CWF613993 CWF613994 CWF613995 CWG87C900

CU-4E23JBE CWG302523

(NOTE) All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488). O marked parts are recommended to be kept in stock.
[PHAAM] Printed in Malaysia SFYW0906-01

Multi Split Outdoor Unit (CU-2E15GBE, CU-2E18CBPG,
Auto OFF/ON button CU-3E18EBE, CU-3E18JBE, CU3E23CBPG, CU-4E27CBPG, CU-4E23JBE) eion AIR PURIFYING SYSTEM

DEFINITION

Multi air conditioner systems save space by letting you connect multiple indoor units to a single outdoor unit. e-ion filters
Used when remote control is misplaced or malfunction. Action Press once. Press and hold until 1 beep is heard, then release. Press and hold until 1 beep is heard, then release. Press again until 2 beeps, then release. Press the button to turn off. INDICATOR

PATROL SENSOR

Do not touch during operation Active e-ion Generator

Mode Auto Cooling

e-ion charging wire

INDOOR UNIT

It is possible to operate the indoor units individually or simultaneously. The operation mode priority is given to the first unit that turned on. During operation, heating and cooling mode could not be activated at the same time for different indoor unit. The power indicator blinks to indicate the indoor unit is standing by for different operation mode.

Heating

Receiver

=nMER =OUlfT

POWERFUL

c::::::::;;:;;;e-Ion

MilD DRY COOLING
(Blue) (Green) (Orange) (Orange) (Orange) (Blue) (Blue)

Maximum distances: 8m

Remote control display
OFF/ON@ PATROL MODE MI.D DRY COOLING

Caution

PATROL
and operations could be activated even when the air-conditioner is turned off. In this condition, once e-ion indicator is ON, the unit will operate with AUTO fan speed and air swing. However, this operation could not be activated or will be deactivated if other indoor unit is activating heating mode.
TIMER_-,-_--",::=->

ON. SET

AC CHECK CLOCK

CANCEL RC

Panasonic

CiNVERTER

TO TURN ON OR OFF THE UNIT

c:::J POWER

TO ENJOY CLEAN & FRESH AIR

TO SET THE TIMER

To turn ON or OFF the unit at a preset time.

ON -----,

OPTIONAL SETIINGS
Please be aware of the OFF indication on the remote control display to prevent the unit from starting/ stopping improperly.
Generates negative ions to produce fresh air effect and attract dust which will then be captured at the positively charged e-ion filters.

c:::J TIMER

Patrol starts automatically with the unit switched on with OfFION@ Press and hold for 5 seconds, then release to disable or restore this setting, Press and hold for 5 seconds to dim or restore the unit's indicator brightness. Press and hold for approximately 10 seconds to show temperature setting in C or oF. Press and hold for approximately 5 seconds to show 12-hour (am/pm) or 24-hour time indication. Press to restore the remote control's default setting. Not used in normal operations,

TO SET TEMPERATURE

TO MONITOR AIR QUALITY

.PATROLSENSOR,

Set the time.
Selection range: 16C - 30C. Operating the unit within the recommended temperature could induce energy saving. HEAT mode: 20C - 24C. COOL mode: 26C - 28'C. DRY mode: 1C - 2C lower than room temperature.

Patrol sensor detects air quality. When the air quality is unsatisfactory, e-ion operation will start automatically.

MILD DRY 'COOLING

Select ON or OFF timer.

Confirm.

To cancel ON or OFF timer, press TO IMPROVE HUMIDITY AND MOISTURE LEVEL (For single Split System)

MILDDRYCDOUNG

CANCEL.
TO SELECT OPERATION MODE AUTO mode - For your convenience During operation mode selection the power indicator blinks. Unit selects operation mode every 30 minutes according to temperature setting, outdoor and room temperature (For single Split System). Unit selects operation mode every 3 hours according to temperature setting, outdoor and room temperature (For Multi split system). HEAT mode To enjoy warm air Unit takes a while to warm up. The power indicator blinks during this operation. COOL mode To enjoy cool air DRY mode To dehumidify the environment Unit operates at low fan speed to give a gentle cooling operation.

FAN SPEED

This operation reduces air dryness and provides you with a comfortable living environment. When vertical airflow direction is set to AUTO, it stops at lower position to avoid cold air contact. However, you can adjust the louver direction manually.
When ON Timer is set, the unit may start earlier (up to 35 minutes) before the actual set time in order to achieve the desired temperature on time. Timer operation is based on the clock set in the remote control and repeats daily once set. For clock setting, please refer to Remote Control Preparation at back cover. If timer is cancelled manually or due to power failure, you can restore the previous setting (once power is resumed) by pressing SET I.
TO ENJOY QUIET ENVIRONMENT

c:::J QUIET

This operation reduces airflow noise.

TO ACHIEVE TEMPERATURE

QUICKLY

c:::J POWERFUL

Use curtains to screen off sunlight and outdoor heat to reduce power consumption during cool mode.
TO SELECT FAN SPEED (5 OPTIONS)

-+.-+ -+ -+ -+

For AUTO, the indoor fan speed is automatically adjusted according to the operation mode.

AIR SWING

TO ADJUST VERTICAL AIRFLOW DIRECTION (5 OPTIONS)

LAuro.-.". l.

7""J
, , and can be activated in all modes and can be cancelled by pressing the respective button again.

MILD DRY COOUNG

Keeps the room ventilated. If AUTO is set, the louvers swing up/down automatically. In heat mode, the air blows horizontally for a while, then starts to blow downwards.
-, only can be activated in COOL mode and can be cancelled by pressing the button again.

~~uO:J

and or -, not be selected at the same time.
and ~ can be activated even when the unit is turned off. In this condition, fan speed and air swing can not be adjusted. 7