TECHNICAL & SERVICE MANUAL
CS-KE30NKU+ CU-KE30NKU CS-KE36NKU+ CU-KE36NKU
Indoor Unit
Outdoor Unit
SAFETY PRECAUTIONS
which may cause a unit breakdown
8. TROUBLESHOOTING BEFORE CALLING FOR SERVICE
Table of Contents
SPECIFICATIONS
REFRIGERANT FLOW DIAGRAM
10. REFRIGERANT R410A
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
INSTALLAION INSTRUCTIONS
9. CHECKING ELECTRICAL COMPONENTS
Outdoor Air Intake Temp
1. OPERATING RANGE
Temperature
Indoor Air Intake Temp
Weight
2. SPECIFICATIONS
2-1.Unit Specifications
Features
CU-KE30NKU
Indoor Unit
CS-KE30NKU
Outdoor Unit
Performance
CS-KE36NKU
CU-KE36NKU
Voltage Rating
Performance
CS-KE36NKU
CU-KE36NKU
Voltage Rating
Fan Motor
2-2.Major Component Specifications
2-2-1.Indoor Unit
Control PCB
Flap Motor
Indoor Unit CS-KE36NKU
Control PCB
Fan Motor
Fan Motor
2-2-2.Outdoor Unit
P.C.Board
Compressor
Heat Exchanger Coil
P.C.Board
Compressor
Fan Motor
2-3.Other Component Specifications
CS-KE36NKU
3. DIMENSIONAL DATA
Unit
CU-KE36NKU
inchmm
194-00-1
4-1.Refrigerant Flow Diagram
4. REFRIGERANT FLOW DIAGRAM
5. PERFORMANCE DATA
5-1.Temperature Charts
Indoor Unit CS-KE30NKU Outdoor Unit CU-KE30NKU
1 High pressure performance chart
2 Operating current performance chart
3 Indoor discharge air performance chart
Indoor Unit CS-KE36NKU Outdoor Unit CU-KE36NKU
1 Low pressure performance chart
2 Operating current performance chart
3 Indoor discharge air performance chart
discharge
5-2.Cooling Capacity
CS-KE30NKU
CU-KE30NKU
CU-KE36NKU
CS-KE36NKU
5-3.Cooling Capacity Low Ambient
CS-KE30NKU
CU-KE30NKU
CU-KE36NKU
CS-KE36NKU
5-4.Heating Capacity
CS-KE30NKU
CU-KE30NKU
CU-KE36NKU
CS-KE36NKU
5-5.Air Throw Distance Charts
Cooling
6. ELECTRICAL DATA
6-1.Electrical Characteristics
Cooling
CS-KE36NKU
CU-KE36NKU
1 Voltage:230V
CONTROLLER
6-2.Electric Wiring Diagrams
Outdoor Unit CU-KE30NKU
CU-KE36NKU
8FA2-5251-15200-0
AUTO cooling/heating operation
7. FUNCTIONS
7-1.Operation Functions
Emergency operation
Lamp colors
HIGH POWER
Timer backup
NIGHT SETBACK
Fig.3 Control P.C.Board Fig.2 View from front
Noise Reducing Control Outdoor Unit
<Switching Procedure to Noise Reducing Control>
<Operation Sound>
Fig.4 Control P.C.Board
Maximum Current Value Change Function
<Maximum Current Value Change Procedure>
Description of function
Freeze prevention
Compressor discharge temperature control
7-2.Protective Functions
Overload prevention during heating
Defrost detection and release
CT Peak current cut-offcontrol
Defrosting Sequence
8. TROUBLESHOOTING BEFORE CALLING FOR SERVICE
8-2.Method of Self-Diagnostics
PROCEDURE
1 OPERATION lamp
2 TIMER lamp
DIAGNOSIS CONTENTS
INDOOR UNIT
Normal
2If the self-diagnosticsfunction fails to operate
Check the power voltage Blown
Check the indoor unit Is the fuse blown?
8-3.Checking the Indoor and Outdoor Units
< Before the Operation >
3-1Alarm Code : E05
Continued from the previous page A
3-2Alarm Code : E07/P04/P05/P20/P27
8-4-1.Indoor Fan Motor
8-4.Trouble Diagnosis of Fan Motor
Remedy for symptom 3 to
8-4-2.Outdoor Fan Motor
Diagnostic procedure
Diagnostic results
Locations most susceptible to noise
Locations most susceptible to noise
Trouble
Correction
9-1-2.Indoor Unit
9-1-1.Power Supply Cord
9. CHECKING ELECTRICAL COMPONENTS
9-1.Measurement of Insulation Resistance
9-2.Checking Continuity of Fuse on PCB Assy
Fig.
Fig.
10-1-3.Characteristics
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
10-1.Characteristics of New Refrigerant R410A
10-1-1.What is New Refrigerant R410A?
No addition of compressor oil for R410A
10-2.Checklist before Servicing
Tubing precautions
Size of flare
10-3.Tools Specifically for R410A
10-4.Tubing Installation Procedures
10-5.In Case of Compressor Malfunction
10-5-1.Procedure for Replacing Compressor
Page
10-6.In Case Refrigerant is Leaking
10-8-1.Use of Existing Units
10-7-1.When Tubes are Extended
10-7.Charging Additional Refrigerant
10-8. Retro-FittingExisting Systems
CS-KE30NKU+ CU-KE30NKU CS-KE36NKU+ CU-KE36NKU
APPENDIX A Operating Instructions
CS-KE36NKU
Operating Instructions
Split System Air Conditioner
CS-KE30NKU
PRODUCT INFORMATION
FEATURES
CONTENTS
SAFETY PRECAUTIONS
INSTALLATION LOCATION
SAFETY INSTRUCTIONS
ELECTRICAL REQUIREMENTS
UNIT DISPLAY AND OPERATION BUTTON
NAMES OF PARTS
Symbols
REMOTE CONTROLLER DISPLAY
ADDRESS switch
REMOTE CONTROLLER
ON TIME/OFF TIME setting buttons Advance button
CANCEL button SENSOR button
Sensor
1 HR. TIMER button 1-HOUROFF TIMER
Temperature setting buttons TEMP
HIGH POWER button
REMOTE CONTROLLER INSTALLATION POSITION
USING THE REMOTE CONTROLLER
HOW TO INSTALL BATTERIES
HOW TO USE THE REMOTE CONTROLLER
STEP STEP
OPERATION WITH THE REMOTE CONTROLLER
1. Automatic Operation
2. Manual Operation
6. QUIET Mode
3. Adjusting the Fan Speed
4. Fan Only
5. Night Setback Mode
Unoccupied
7. HIGH POWER Mode
8. UNOCCUPIED Mode
Unoccupied Indication
‘‘DRY’’ Operation
Power failure during operation
Remote Controller
SPECIAL REMARKS
3. How to set the ON time
SETTING THE TIMER
1. How to set the present time
2. How to set the OFF time
TIPS FOR ENERGY SAVING
USING THE 1-HOUROFF TIMER
4. How to set daily ON/OFF repeat timer
1. 1-HourOFF Timer
2. Vertical
ADJUSTING THE AIRFLOW DIRECTION
OPERATION WITHOUT THE REMOTE CONTROLLER
1. Horizontal
Washing the front panel with water
How to replace the filter
Cleaning the main unit and Remote Controller
Removing and remounting the front panel
WIRED REMOTE CONTROLLER
TROUBLESHOOTING BEFORE CALLING FOR SERVICE
OPERATING RANGE
Indoor Unit
SPECIFICATIONS
Model No
Outdoor Unit
Page
CS-KE30NKU+ CU-KE30NKU CS-KE36NKU+ CU-KE36NKU
APPENDIX B INSTALLATION INSTRUCTIONS
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Contents
In Case of Improper Installation
SPECIAL PRECAUTIONS
When Transporting
When Installing…
accidentally
When Servicing
Others
fins of the outdoor unit. You may get injured
1-3.Optional Copper Tubing Kit
1. General
1-1.Tools Required for Installation not supplied
1-2.Accessories Supplied with Unit Table
2. Installation Site Selection
Page
Fig. 5e
Countermeasures against snow and wind
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Unit: inch
2-2-3.Dimensions of Wind-proofDuct
Reference diagram for CU-KE30NKU, CU-KE36NKU
Unit: inch
Required space around the outdoor unit
Reference diagram for CU-KE30NKU, CU-KE36NKU
2-2-4.Dimensions of Snow-proofDuct
Obstacle to the rear of unit
Reference diagram for snow-proofduct
Space requirements for setting
CU-KE30NKU, CU-KE36NKUwith STK-BDV80E
9:*2,9545:/90+,9
Installation in front-rearrows
Obstacles to the front and rear of unit
#04.2,;40:049:22:054
3. How to Install the Indoor Unit
b If Block, Brick, Concrete or Similar Type Wall
3-3.Install the Rear Panel on the Wall
Table
a If Wooden Wall
Fig. 17a
3-4.Removing and Installing the Grille
How to remove the grille
How to replace the grille
Fig.
3-6.Wiring Instructions
General precautions on wiring
3-5.Shape the Indoor Side Tubing
3-7.Wire Size and Length
Fig.
3-8.Wiring Instructions for Inter-unitConnections
Fig.
Fig.
How to connect wiring to the terminal
Fig. 37b
3-9.Mounting
Right-sidetubing
Fig. 37a
Drain cap
Switching drain hose and drain cap
Left-sidetubing
Drain hose
To unmount indoor unit
Fig.46a
4. How to Install the Outdoor Unit
4-1.Wiring Instructions for the Outdoor Unit
4-2.Routing the Tubing and Wiring
5-1.Use of the Flaring Method
5. Refrigerant Tubing
5-2.Flaring Procedure with a Flare Tool
5-3.Caution before Connecting Tubes Tightly
Table
6. Air Purging
Fig.
Be sure to completely insert
the hex wrench before
attempting to turn the valve
How to Test Run the Air Conditioner
Fig. 59a Fig. 59b
Fig. 59c
Pump Down
Basic Functions of the Service Valves
7. Remote Controller Installation Position
Service Valve Connections
Fig.
8. Address Switch
8-1.Address Setting of the Remote Controller
Fig.
DC1111-0