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Panasonic
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Household Appliance
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Air Conditioner
Panasonic
CU-KS18NKUA, CU-KS12NK1A, CS-KS12NB41 & CZ-18BT1U, CS-KS18B4UW & CZ-18BT1U DC1111-0
Models:
CS-KS18B4UW & CZ-18BT1U
CS-KS12NB41 & CZ-18BT1U
CU-KS12NK1A
CU-KS18NKUA
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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 136
Image 136
DC1111-0
Page 135
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Image 136
Page 135
Contents
CS-KS12NB41Body & CZ-18BT1UPanel
CS-KS18NB4UWBody & CZ-18BT1UPanel
CU-KS12NK1A
CU-KS18NKU CU-KS18NKUA
SAFETY PRECAUTIONS
which may cause a unit breakdown
Table of Contents
SPECIFICATIONS
REFRIGERANT FLOW DIAGRAM
MAINTENANCE
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
INSTALLATION INSTRUCTIONS
10. CHECKING ELECTRICAL COMPONENTS
11. REFRIGERANT R410A
1. OPERATING RANGE
Temperature
Temperature
Models : CS-KS18NB4UW& CZ-18BT1U+ CU-KS18NKU
2. SPECIFICATIONS
Unit Specifications
2-1-1
CS-KS18NB4UW& CZ-18BT1U
Dimensions & Weight Indoor Unit
Dimensions & Weight Outdoor Unit
CS-KS18NB4UW& CZ-18BT1U
CU-KS18NKU
2-1-2. Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
Outdoor Unit
CU-KS18NKU
Dimensions & Weight Indoor Unit
Dimensions & Weight Outdoor Unit
CS-KS18NB4UW& CZ-18BT1U
CU-KS18NKU
2-1-3. Indoor Unit
CS-KS12NB41& CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Voltage Rating
Dimensions & Weight Outdoor Unit
Dimensions & Weight Indoor Unit
CS-KS12NB41& CZ-18BT1U
2-1-4. Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
Outdoor Unit CU-KS18NKUA
< 230V >
Dimensions & Weight Outdoor Unit
Dimensions & Weight Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
2-1-5. Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
Outdoor Unit CU-KS18NKUA
< 208V >
Dimensions & Weight Indoor Unit
Dimensions & Weight Outdoor Unit
Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
2-2.Major Component Specifications
2-2-1.Indoor Unit
Control PCB
Fan Motor
Control PCB
Fan Motor
Drain Pump
Heat Exchanger Coil
2-2-2.Outdoor Unit
Control PCB
Compressor
Fan Motor
Control PCB
Compressor
Fan Motor
Heat Exchanger Coil
Control PCB
Compressor
Fan Motor
Heat Exchanger Coil
2-3.Other Component Specifications
Temperature F C
Temperature F C
Temperature F C
Indoor Unit CS-KS12NB41& CZ-18BT1U
3. DIMENSIONAL DATA
CS-KS18NB4UW& CZ-18BT1U
Unit : inch mm 852-0-0010-12600-0
CU-KS18NKUA
Unit : inch mm 852-0-0010-13300-0
4. REFRIGERANT FLOW DIAGRAM
4-1.Refrigerant Flow Diagram
Indoor Unit CS-KS12NB41& CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Indoor unit
CU-KS18NKUA
Outdoor unit
5-1.Temperature Charts
5. PERFORMANCE DATA
Indoor Unit CS-KS12NB41& CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Indoor Unit CS-KS18NB4UW& CZ-18BT1U
Outdoor Unit CU-KS18NKUor CU-KS18NKUA
CS-KS12NB41& CZ-18BT1U
5-2.Cooling Capacity
CU-KS12NK1A
Power Supply : 230V Single Phase 60Hz
Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
Outdoor Unit
CS-KS12NB41& CZ-18BT1U
5-3.Cooling Capacity Low Ambient
CU-KS12NK1A
CU-KS18NKUA
CS-KS18NB4UW& CZ-18BT1U
SHC : Sensible Heat Capacity BTU/h
6-1.Electrical Characteristics
6. ELECTRICAL DATA
Indoor Unit CS-KS12NB41& CZ-18BT1U
Cooling
CS-KS18NB4UW& CZ-18BT1U
CU-KS18NKU
Cooling
Cooling
6-2.Electric Wiring Diagrams
Indoor Unit
CS-KS18NB4UW
CS-KS12NB41&
Outdoor Unit CU-KS12NK1A
8FA2-5251-12300-2
Outdoor Unit CU-KS18NKU CU-KS18NKUA
7. MAINTENANCE
7-1.Address Setting of the Remote Controller
Fig.
Fig.
How to Connect
How to Disconnect
Pull the cover upward
7-3.Disassembly Procedure
7-3-1.Remove the air intake grill
WARNING attempting to disassemble the unit
Fig.1
7-3-3.Remove the ceiling panel
Fig.6
Fig.7
Fig.8
7-3-4.Remove the indoor air temperature sensor
7-3-5.Remove the power box and control box
Fig.10
Fig.11
Fig.13
Fig.14
Fig.15 44
Screw Ground cable
7-3-6.Remove the main body lower section
Fig.16
Fig.17
Fig.18
7-3-8.Remove the drain pump and float switch
7-3-7.Remove the heat exchanger sensor
Fig.19
Fig.20
7-3-9.Remove the turbo fan and fan motor
7-3-10.Remove the heat exchanger
Fig.22
Fig.23
8. FUNCTIONS
8-1.Operation Functions
Emergency operation
SENSOR DRY
HIGH POWER
Timer backup
NIGHT SETBACK
Lamp colors
Compressor discharge temperature control
8-2.Protective Functions
Freeze prevention
CT Peak current cut-offcontrol
9-2.Method of Self-Diagnostics
9. TROUBLESHOOTING BEFORE CALLING FOR SERVICE
PROCEDURE
1 Self-diagnosticsLamps
TIMER lamp
HIGH POWER lamp
REMOTE CONTROL receiver
9-3.Checking the Indoor and Outdoor Units
2If the self-diagnosticsfunction fails to operate
Using the TEST/T-RUNterminals
Check the indoor unit Is the fuse blown?
< Before the Operation >
3-1Condition: E01
Continued from the previous page A
3-2Condition: E12
9-4.Trouble Diagnosis of Fan Motor
9-4-1.Indoor Fan Motor
Diagnostic procedure
Diagnostic results
9-4-2.Outdoor Fan Motor
Diagnostic procedure
Diagnostic results
Remedy for symptom 3 to
1 Noise malfunction
2 Electromagnetic interference
Locations most susceptible to noise
Trouble
10-1-1.Power Supply Cord
10. CHECKING ELECTRICAL COMPONENTS
10-1.Measurement of Insulation Resistance
10-1-2.Indoor Unit
Fig.
10-2.Checking Continuity of Fuse on PCB Assy
Fig.
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1.Characteristics of New Refrigerant R410A
11-1-1.What is New Refrigerant R410A?
11-1-3.Characteristics
11-2.Checklist before Servicing
Tubing precautions
Size of flare
No addition of compressor oil for R410A
11-4.Tubing Installation Procedures
11-3.Tools Specifically for R410A
For servicing, use the following tools for R410A
Tool Distinction
11-5-1.Procedure for Replacing Compressor
11-5.In Case of Compressor Malfunction
1 Recovering refrigerant
2 Replacing Compressor
Configuration and characteristics of cylinders
5 Recharging
Never charge a large amount
Example
11-6.In Case Refrigerant is Leaking
2 Recovering refrigerant
1 Detecting Leaks
3 Welding leaking points
11-7-1.When Tubes are Extended
11-7.Charging Additional Refrigerant
11-8. Retro-FittingExisting Systems
11-8-1.Use of Existing Units
Page
APPENDIX A
Operating Instructions
Split System Air Conditioner
CS-KS12NB41 CU-KS12NK1A CS-KS18NB4UW CU-KS18NKU
CU-KS18NKUA
CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
FEATURES
CONTENTS
SAFETY PRECAUTIONS
PRODUCT INFORMATION
INSTALLATION LOCATION
SAFETY INSTRUCTIONS
ELECTRICAL REQUIREMENTS
Avoid
NAMES OF PARTS
UNIT DISPLAY AND OPERATION BUTTON
Air Intake
Air Outlet
REMOTE CONTROLLER DISPLAY
Symbols
REMOTE CONTROLLER
HIGH POWER button
ON TIME/OFF TIME setting buttons Advance button
CANCEL button SENSOR button
1 HR. TIMER button 1-HOUROFF TIMER
Temperature setting buttons TEMP
Sensor
ON/OFF operation button
USING THE REMOTE CONTROLLER
HOW TO INSTALL BATTERIES
HOW TO USE THE REMOTE CONTROLLER
REMOTE CONTROLLER INSTALLATION POSITION
OPERATION WITH THE REMOTE CONTROLLER
2. Adjusting the Fan Speed
1. Operation
3. Fan Only
SETTING THE TIMER
5. HIGH POWER Mode
Power failure during operation
Remote Controller
1. How to set the present time
2. How to set the OFF time
3. How to set the ON time
4. How to set daily ON/OFF repeat timer
USING THE 1-HOUROFF TIMER
ADJUSTING THE AIRFLOW DIRECTION
1. 1-HourOFF Timer
TIPS FOR ENERGY SAVING
CARE AND CLEANING
OPERATION WITHOUT THE REMOTE CONTROLLER
When the air conditioner is not running
Cleaning the flaps
How to remove the filter
How to remove the air intake grille
Safety cord Air filter
Air intake grille hinge Safety cord
TROUBLESHOOTING
WIRED REMOTE CONTROLLER
BEFORE CALLING FOR SERVICE
OPERATING RANGE
SPECIFICATIONS
Model No
Outdoor Unit
Indoor Unit
•For Multiple use
•For Multiple use
Model No
Indoor Unit
INSTALLATION INSTRUCTIONS
APPENDIX B
Contents
3. HOW TO INSTALL THE INDOOR UNIT
4. HOW TO INSTALL THE OUTDOOR UNIT
7.REMOTE CONTROLLER INSTALLATION
SPECIAL PRECAUTIONS
In Case of Improper Installation
When Transporting
When Installing…
When Servicing
Others
fins of the outdoor unit. You may get injured
accidentally
1. General
1-1.Tools Required for Installation not supplied
1-2.Accessories Supplied with Unit Table
1-3.Optional Copper Tubing Kit
2. Installation Site Selection
2-1.Indoor Unit
AVOID
Fig.
2-2.Outdoor Unit AVOID
Fig. CU-KS12NK1A
Fig. 4a
CU-KS18NKU, CU-KS18NKUA
Back
Front
Fig. 5c
Air Intake Baffle
Air Discharge Baffle
1Recommended dimensions of the baffle plates
CU-KS12NK1A
1Recommended dimensions of the baffle plates
Air Intake Baffle
Air Discharge Baffle
CU-KS18NKUA
3 Installation procedure CU-KS12NK1A
1. Air Intake Baffle
2.Air Discharge Baffle
Fig. 5h
4 Precautions for installation
CU-KS18NKUA
1. Air Intake Baffle
2. Air Discharge Baffle
3. How to Install the Indoor Unit
3-1.Preparation for Suspending
3-2.Suspending the Indoor Unit
3-3.Placing the Unit Inside the Ceiling
3-4.Installing the Drain Piping
Do not use natural drainage
Fig.
Fig.
3-6.How to Install the Ceiling Panel
3-6-1.Before Installing the Ceiling Panel
3-5.Checking the Drainage
Fig. 6-10a
3-6-2.Installing the Ceiling Panel
Fig.
Fig.
Fig.
3-6-3.Wiring the Ceiling Panel and the Indicator
Fig.
Fig.
A. Attaching the corner cover
3-6-5.Checking After Installation
3-6-7.Adjusting the Auto Flap
3-7.Wiring Instructions
General precautions on wiring
Each wire must be firmly connected
WIRING SYSTEM DIAGRAM CU-KS12NK1A
Table
Otherwise, electrical shock may occur
3-9.Wiring Instructions for Inter-unitConnections
How to connect wiring to the terminal
For solid core wiring or F-cable
Fig.
4. How to Install the Outdoor Unit
For stranded wiring
4-1.Wiring Instructions for the Outdoor Unit
Fig.
5. Refrigerant Tubing
5-2.Flaring Procedure with a Flare Tool
5-3.Caution before Connecting Tubes Tightly
5-1.Use of the Flaring Method
Table
5-5.Insulation of Refrigerant Tubing
Fig.
Fig.
6. Air Purging
5-7.Finishing the Installation
5-6.Taping the Tubes
Air Purging with a Vacuum Pump for Test Run
Table
Be sure to completely insert the hex
wrench before attempting to turn the valve
Fig.
Fig. Fig.
How to Test Run the Air Conditioner
Fig.
Basic Functions of the Service Valves
Pump Down
ing the service valve
Pump Down Procedure
Service Valve Connections
7. Remote Controller Installation Position
Remote control holder
Table
8. Address Switch
8-1.Address Setting of the Remote Controller
Fig.
Fig.
Page
CZ-RD515U
APPENDIX C
Operating Instructions
Operating Instructions Wired Remote Controller
Model No. CZ-RD515U
FEATURES
CONTENTS
SAFETY PRECAUTIONS
PRODUCT INFORMATION
INSTALLATION LOCATION
SAFETY INSTRUCTIONS
ELECTRICAL REQUIREMENTS
Avoid
REMOTE CONTROLLER
Temperature setting buttons TEMP
Timer and Present Time setting buttons
Display
1 HR. TIMER button 1-HOUROFF TIMER
TIMER SELECT button
AUTO
HEAT
Symbols
REMOTE CONTROLLER DISPLAY
1Operation mode AUTO only for COOL/DRY/HEAT Model
1.Automatic Operation
only for COOL/DRY/HEAT Model
2. Manual Operation
OPERATION WITH THE REMOTE CONTROLLER
3. Adjusting the Fan Speed
Remote Controller Display
4. Fan Only
5. Night Setback Mode
5. Backup function
SETTING THE TIMER
1. How to set the present time
2. How to set the OFF time
USING THE 1-HOUROFF TIMER
ADJUSTING THE AIRFLOW DIRECTION
1. 1-HourOFF Timer
Setting procedure
Page
INSTALLATION INSTRUCTIONS
APPENDIX D
CZ-RD515U
INSTALLATION INSTRUCTIONS Wired Remote Controller
Parts supplied with the remote controller
Remote controller installation guidelines
How to install the remote controller
A. Installing with in-walljunction box
B. Installing directly onto the wall
Fig. 2-a
Fig. 2-b
How to wire the remote controller
Fig.
Fig. 8-a
Fig.
How to Test Run the Air Conditioner
Fig.
Fig.
Fig. WI1011-0 Printed in China
Page
DC1111-0
