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Air Conditioner
Panasonic
CS-KS24NKU, CU-KS24NKUA service manual
Models:
CU-KS24NKUA
CS-KS24NKU
CU-KS24NKU
1
121
122
122
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122 pages
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<
>
Troubleshooting
Specs
Electrical Characteristics
Install
Refrigerant Flow Diagram
Dimension
Maintenance
Wired Remote Controller
Remedy for symptom 3 to
2If the self-diagnosticsfunction fails to operate
Page 121
Image 121
Page 120
Page 122
Page 121
Image 121
Page 120
Page 122
Contents
CS-KS24NKU+ CU-KS24NKU+ CU-KS24NKUA
CS-KS18NKU+ CU-KS18NKU+ CU-KS18NKUA
Indoor Unit
Outdoor Unit
SAFETY PRECAUTIONS
which may cause a unit breakdown
SPECIFICATIONS
Table of Contents
4. REFRIGERANT FLOW DIAGRAM
7. MAINTENANCE
11. REFRIGERANT R410A
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
APPENDIX A
APPENDIX B
Indoor Air Intake Temp
1. OPERATING RANGE
Outdoor Air Intake Temp
Cooling
2-1.Unit Specifications
2. SPECIFICATIONS
Voltage Rating
ical
CS-KS18NKU
Indoor Unit
Outdoor Unit
CU-KS18NKU
CU-KS24NKU
CS-KS24NKU
Voltage Rating
ical
CU-KS24NKU
CS-KS24NKU
Voltage Rating
ical
CU-KS18NKUA
CS-KS18NKU
Voltage Rating
ical
CU-KS18NKUA
CS-KS18NKU
Voltage Rating
ical
CS-KS24NKU
Indoor Unit
Outdoor Unit CU-KS24NKUA
230V
CS-KS24NKU
Indoor Unit
Outdoor Unit
CU-KS24NKUA
2-2-1.Indoor Unit
2-2.Major Component Specifications
Control PCB
Fan Motor
Control PCB
Indoor Unit CS-KS24NKU
Fan Motor
Flap Motor
Control PCB
2-2-2.Outdoor Unit
Compressor
Fan Motor
Compressor
Control PCB
Fan Motor
Heat Exchanger Coil
Compressor
Control PCB
Fan Motor
Heat Exchanger Coil
Compressor
Control PCB
Fan Motor
Heat Exchanger Coil
2-3.Other Component Specifications
CS-KS24NKU
3. DIMENSIONAL DATA
CU-KS18NKUA
Unit inchmm
CU-KS24NKUA
4-1.Refrigerant Flow Diagram
4. REFRIGERANT FLOW DIAGRAM
Insulation of Refrigerant Tubing
5. PERFORMANCE DATA
5-1.Temperature Charts
2 Operating current performance chart
1 Low pressure performance chart
3 Indoor discharge air performance chart
Indoor Unit CS-KS18NKU Outdoor Unit CU-KS18NKUA
2 Operating current performance chart
1 Low pressure performance chart
3 Indoor discharge air performance chart
Indoor Unit CS-KS24NKU Outdoor Unit CU-KS24NKU
2 Operating current performance chart
1 Low pressure performance chart
3 Indoor discharge air performance chart
Indoor Unit CS-KS24NKU Outdoor Unit CU-KS24NKUA
CS-KS18NKU
5-2.Cooling Capacity
Outdoor Unit : CU-KS18NKU / CU-KS18NKUA
Outdoor Unit CU-KS24NKU / CU-KS24NKUA
CS-KS24NKU
Power Supply : 230V Single Phase 60Hz
5-3.Cooling Capacity Low Ambient
Indoor Unit : CS-KS18NKU
Outdoor Unit : CU-KS18NKUA
CU-KS24NKUA
CS-KS24NKU
5-4.Air Throw Distance Charts
Cooling
6. ELECTRICAL DATA
6-1.Electrical Characteristics
Indoor Unit
CS-KS18NKU
CS-KS24NKU
Indoor Unit
Outdoor Unit CU-KS24NKUA
ASSY
6-2.Electric Wiring Diagrams
LAMP
CONTROLLER
Outdoor Unit CU-KS18NKU CU-KS18NKUA
and/or cleaning any electrical parts
and/or cleaning any electrical parts
1P-CONNECTORWHT
and/or cleaning any electrical parts
7-1.Address Setting of the Remote Control Unit
7. MAINTENANCE
How to Connect
How to Disconnect
Pull the cover upward
8-1.Operation Functions
8. FUNCTIONS
Emergency operation
SENSOR DRY
Timer backup
HIGH POWER
NIGHT SETBACK
Lamp colors
8-2.Protective Functions
Compressor discharge temperature control
Freeze prevention
CT Peak current cut-offcontrol
9-2.Method of Self-Diagnostics
9. TROUBLESHOOTING BEFORE CALLING FOR SERVICE
PROCEDURE
REMOTE CONTROL receiver
INDOOR UNIT 1 OPERATION lamp 2 TIMER lamp
DIAGNOSIS CONTENTS
3 QUIET lamp OPERATION button
Check the power voltage Blown
2If the self-diagnosticsfunction fails to operate
Check the indoor unit Is the fuse blown?
Normal
9-3.Checking the Indoor and Outdoor Units
3-1Condition: E01
< Before the Operation >
Continued from the previous page A
3-2Condition: E12
9-4-1.Indoor Fan Motor
9-4.Trouble Diagnosis of Fan Motor
Diagnostic procedure
9-4-2.Outdoor Fan Motor
Diagnostic results
Remedy for symptom 3 to
Trouble
Locations most susceptible to noise
Correction
Locations most susceptible to noise
10. CHECKING ELECTRICAL COMPONENTS
10-1-1.Power Supply Cord
10-1.Measurement of Insulation Resistance
10-1-2.Indoor Unit
Fig.
10-2.Checking Continuity of Fuse on PCB Assy
Fig.
11-1.Characteristics of New Refrigerant R410A
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1-1.What is New Refrigerant R410A?
11-1-3.Characteristics
Tubing precautions
11-2.Checklist before Servicing
Size of flare
No addition of compressor oil for R410A
11-3.Tools Specifically for R410A
11-4.Tubing Installation Procedures
11-5.In Case of Compressor Malfunction
11-5-1.Procedure for Replacing Compressor
Page
11-6.In Case Refrigerant is Leaking
11-7.Charging Additional Refrigerant
11-7-1.When Tubes are Extended
11-8. Retro-FittingExisting Systems
11-8-1.Use of Existing Units
CS-KS18NKU+ CU-KS18NKU+ CU-KS18NKUA
APPENDIX A Operating Instructions
CS-KS24NKU+ CU-KS24NKU+ CU-KS24NKUA
Split System Air Conditioner
Operating Instructions
CS-KS18NKU
CU-KS18NKU
CONTENTS
FEATURES
SAFETY PRECAUTIONS
PRODUCT INFORMATION
SAFETY INSTRUCTIONS
INSTALLATION LOCATION
ELECTRICAL REQUIREMENTS
•Refrigerant gas leakage may cause fire
Remote Controller Drain Hose Refrigerant Tubes
NAMES OF PARTS
Remote Controller
Air Intakes INDOOR UNIT Air Outlet
UNIT DISPLAY AND OPERATION BUTTON
REMOTE CONTROLLER DISPLAY
REMOTE CONTROLLER
REMOTE CONTROLLER CONTINUED
REMOTE CONTROLLER CONTINUED
USING THE REMOTE CONTROLLER
USING THE REMOTE CONTROLLER CONTINUED
1. Operation
OPERATION WITH THE REMOTE CONTROLLER
2.Adjusting the Fan Speed
OPERATION WITH THE REMOTE CONTROLLER CONTINUED
3.Fan Only
OPERATION WITH THE REMOTE CONTROLLER CONTINUED
4. Night Setback Mode
Setting
temperature
5. QUIET Mode
6. HIGH POWER Mode
OPERATION WITH THE REMOTE CONTROLLER CONTINUED
SPECIAL REMARKS
Remote Controller
‘‘DRY’’ Operation
Cooling Operation
1.How to set the present time
SETTING THE TIMER
REPEAT timer
SETTING THE TIMER CONTINUED
TIPS FOR ENERGY SAVING
USING THE 1-HOUROFF TIMER
ADJUSTING THE AIRFLOW DIRECTION
CARE AND CLEANING
OPERATION WITHOUT THE REMOTE CONTROLLER
CARE AND CLEANING CONTINUED
CARE AND CLEANING CONTINUED
WIRED REMOTE CONTROLLER
Washing the grille with water
OPERATING RANGE
TROUBLESHOOTING BEFORE CALLING FOR SERVICE
Trouble
Possible Cause
Model No
SPECIFICATIONS
Outdoor Unit
Indoor Unit
APPENDIX B
INSTALLATION INSTRCTIONS
CS-KS18NKU+ CU-KS18NKU+ CU-KS18NKUA
CS-KS24NKU+ CU-KS24NKU+ CU-KS24NKUA
This air conditioner uses the refrigerant R410A
Contents
When Transporting
SPECIAL PRECAUTIONS
When Installing…
In Case of Improper Installation
Others
When Servicing
fins of the outdoor unit. You may get injured
accidentally
1-1.Tools Required for Installation not supplied
1. General
1-2.Accessories Supplied with Unit Table
1-3.Optional Copper Tubing Kit
2. Installation Site Selection
About
About
Back
Front
Fig. 5f
Air Discharge Baffle
Air Intake Baffle
1 Recommended dimensions of the baffle plates
Fig. 5g For Air Intake
4 Precautions for installation
3 Installation procedure
1. Air Intake Baffle
2. Air Discharge Baffle
trical wiring or conduits are
3. How to Install the Indoor Unit
3-1.Remove the Rear Panel from the Unit
3-2.Make a Hole
Table
3-3.Install the Rear Panel on the Wall
a If Wooden Wall
b If Block, Brick, Concrete or Similar Type Wall
How to remove the grille
3-4.Remove the Grille to Install the Indoor Unit
How to replace the grille
Fig. 19b
General precautions on wiring
3-6.Wiring Instructions
3-5.Shape the Indoor Side Tubing
Fig.
3-7.Recommended Wire Length and Diameter
Plasticcover Wiring 10 25 cm
3-8.Wiring Instructions for Inter-unitConnections
Inter-unitwiring Earth plate Lock nut
Top of conduit connector
How to connect wiring to the terminal
Right-sidetubing
3-9.Mounting
Fig. 37a
Fig. 37b
Left-sidetubing
To unmount indoor unit
4-1.Wiring Instructions for the Outdoor Unit
4. How to Install the Outdoor Unit
Fig.
5-2.Flaring Procedure with a Flare Tool
5. Refrigerant Tubing
5-3.Caution before Connecting Tubes Tightly
5-1.Use of the Flaring Method
Table
Air Purging with a Vacuum Pump for Test Run
6. Air Purging
tem. The valve core is similar to
those used in automobile tires
Fig.
Fig. 59a Fig. 59b
How to Test Run the Air Conditioner
Fig. 59c
Pump Down
Basic Functions of the Service Valves
When opening or closing the service valve stem
Pump Down Procedure
7. Remote Controller Installation Position
Service Valve Connections
Table
Fig. 60c
8-1.Address Setting of the Remote Controller
8. Address Switch
Fig.
Fig.
Page
DC1111-0
