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Air Conditioner
Panasonic
CU-KS12NK1A, CU-KS18NKUA, CS-KS12NB41 & CZ-18BT1U, CS-KS18B4UW & CZ-18BT1U service manual
Models:
CS-KS18B4UW & CZ-18BT1U
CS-KS12NB41 & CZ-18BT1U
CU-KS12NK1A
CU-KS18NKUA
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Troubleshooting
Specification
Electrical Characteristics
Install
Refrigerant Flow Diagram
Dimension
Maintenance
Wired Remote Controller
Remedy for symptom 3 to
2If the self-diagnosticsfunction fails to operate
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Image 129
Page 128
Page 130
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Image 129
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Page 130
Contents
CS-KS18NB4UWBody & CZ-18BT1UPanel
CS-KS12NB41Body & CZ-18BT1UPanel
CU-KS12NK1A
CU-KS18NKU CU-KS18NKUA
SAFETY PRECAUTIONS
which may cause a unit breakdown
SPECIFICATIONS
Table of Contents
REFRIGERANT FLOW DIAGRAM
MAINTENANCE
INSTALLATION INSTRUCTIONS
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
10. CHECKING ELECTRICAL COMPONENTS
11. REFRIGERANT R410A
Temperature
1. OPERATING RANGE
Temperature
Models : CS-KS18NB4UW& CZ-18BT1U+ CU-KS18NKU
Unit Specifications
2. SPECIFICATIONS
2-1-1
CS-KS18NB4UW& CZ-18BT1U
Dimensions & Weight Outdoor Unit
Dimensions & Weight Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
CU-KS18NKU
CS-KS18NB4UW& CZ-18BT1U
2-1-2. Indoor Unit
Outdoor Unit
CU-KS18NKU
Dimensions & Weight Outdoor Unit
Dimensions & Weight Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
CU-KS18NKU
CS-KS12NB41& CZ-18BT1U
2-1-3. Indoor Unit
Outdoor Unit CU-KS12NK1A
Voltage Rating
Dimensions & Weight Indoor Unit
Dimensions & Weight Outdoor Unit
CS-KS12NB41& CZ-18BT1U
CS-KS18NB4UW& CZ-18BT1U
2-1-4. Indoor Unit
Outdoor Unit CU-KS18NKUA
< 230V >
Dimensions & Weight Indoor Unit
Dimensions & Weight Outdoor Unit
CS-KS18NB4UW& CZ-18BT1U
CS-KS18NB4UW& CZ-18BT1U
2-1-5. Indoor Unit
Outdoor Unit CU-KS18NKUA
< 208V >
Dimensions & Weight Outdoor Unit
Dimensions & Weight Indoor Unit
Indoor Unit
CS-KS18NB4UW& CZ-18BT1U
2-2-1.Indoor Unit
2-2.Major Component Specifications
Control PCB
Fan Motor
Fan Motor
Control PCB
Drain Pump
Heat Exchanger Coil
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
Temperature F C
2-3.Other Component Specifications
Temperature F C
Temperature F C
3. DIMENSIONAL DATA
Indoor Unit CS-KS12NB41& CZ-18BT1U
CS-KS18NB4UW& CZ-18BT1U
Unit : inch mm 852-0-0010-12600-0
Unit : inch mm 852-0-0010-13300-0
CU-KS18NKUA
4-1.Refrigerant Flow Diagram
4. REFRIGERANT FLOW DIAGRAM
Indoor Unit CS-KS12NB41& CZ-18BT1U
Outdoor Unit CU-KS12NK1A
CU-KS18NKUA
Indoor unit
Outdoor unit
5. PERFORMANCE DATA
5-1.Temperature Charts
Indoor Unit CS-KS12NB41& CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Outdoor Unit CU-KS18NKUor CU-KS18NKUA
Indoor Unit CS-KS18NB4UW& CZ-18BT1U
5-2.Cooling Capacity
CS-KS12NB41& CZ-18BT1U
CU-KS12NK1A
Indoor Unit
Power Supply : 230V Single Phase 60Hz
CS-KS18NB4UW& CZ-18BT1U
Outdoor Unit
5-3.Cooling Capacity Low Ambient
CS-KS12NB41& CZ-18BT1U
CU-KS12NK1A
CS-KS18NB4UW& CZ-18BT1U
CU-KS18NKUA
SHC : Sensible Heat Capacity BTU/h
6. ELECTRICAL DATA
6-1.Electrical Characteristics
Indoor Unit CS-KS12NB41& CZ-18BT1U
Cooling
CU-KS18NKU
CS-KS18NB4UW& CZ-18BT1U
Cooling
Cooling
Indoor Unit
6-2.Electric Wiring Diagrams
CS-KS18NB4UW
CS-KS12NB41&
8FA2-5251-12300-2
Outdoor Unit CU-KS12NK1A
Outdoor Unit CU-KS18NKU CU-KS18NKUA
7-1.Address Setting of the Remote Controller
7. MAINTENANCE
Fig.
Fig.
How to Disconnect
How to Connect
Pull the cover upward
7-3-1.Remove the air intake grill
7-3.Disassembly Procedure
WARNING attempting to disassemble the unit
Fig.1
Fig.6
7-3-3.Remove the ceiling panel
Fig.7
Fig.8
7-3-5.Remove the power box and control box
7-3-4.Remove the indoor air temperature sensor
Fig.10
Fig.11
Fig.14
Fig.13
Fig.15 44
Screw Ground cable
Fig.16
7-3-6.Remove the main body lower section
Fig.17
Fig.18
7-3-7.Remove the heat exchanger sensor
7-3-8.Remove the drain pump and float switch
Fig.19
Fig.20
7-3-10.Remove the heat exchanger
7-3-9.Remove the turbo fan and fan motor
Fig.22
Fig.23
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. TROUBLESHOOTING BEFORE CALLING FOR SERVICE
9-2.Method of Self-Diagnostics
PROCEDURE
TIMER lamp
1 Self-diagnosticsLamps
HIGH POWER lamp
REMOTE CONTROL receiver
2If the self-diagnosticsfunction fails to operate
9-3.Checking the Indoor and Outdoor Units
Using the TEST/T-RUNterminals
Check the indoor unit Is the fuse blown?
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
Diagnostic results
Diagnostic procedure
9-4-2.Outdoor Fan Motor
Diagnostic results
Remedy for symptom 3 to
2 Electromagnetic interference
1 Noise malfunction
Locations most susceptible to noise
Trouble
10. CHECKING ELECTRICAL COMPONENTS
10-1-1.Power Supply Cord
10-1.Measurement of Insulation Resistance
10-1-2.Indoor Unit
10-2.Checking Continuity of Fuse on PCB Assy
Fig.
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
For servicing, use the following tools for R410A
Tool Distinction
11-5.In Case of Compressor Malfunction
11-5-1.Procedure for Replacing Compressor
1 Recovering refrigerant
2 Replacing Compressor
5 Recharging
Configuration and characteristics of cylinders
Never charge a large amount
Example
2 Recovering refrigerant
11-6.In Case Refrigerant is Leaking
1 Detecting Leaks
3 Welding leaking points
11-7.Charging Additional Refrigerant
11-7-1.When Tubes are Extended
11-8. Retro-FittingExisting Systems
11-8-1.Use of Existing Units
Page
Operating Instructions
APPENDIX A
CS-KS12NB41 CU-KS12NK1A CS-KS18NB4UW CU-KS18NKU
Split System Air Conditioner
CU-KS18NKUA
CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
CONTENTS
FEATURES
SAFETY PRECAUTIONS
PRODUCT INFORMATION
SAFETY INSTRUCTIONS
INSTALLATION LOCATION
ELECTRICAL REQUIREMENTS
Avoid
UNIT DISPLAY AND OPERATION BUTTON
NAMES OF PARTS
Air Intake
Air Outlet
Symbols
REMOTE CONTROLLER DISPLAY
HIGH POWER button
REMOTE CONTROLLER
ON TIME/OFF TIME setting buttons Advance button
CANCEL button SENSOR button
Temperature setting buttons TEMP
1 HR. TIMER button 1-HOUROFF TIMER
Sensor
ON/OFF operation button
HOW TO INSTALL BATTERIES
USING THE REMOTE CONTROLLER
HOW TO USE THE REMOTE CONTROLLER
REMOTE CONTROLLER INSTALLATION POSITION
2. Adjusting the Fan Speed
OPERATION WITH THE REMOTE CONTROLLER
1. Operation
3. Fan Only
5. HIGH POWER Mode
SETTING THE TIMER
Power failure during operation
Remote Controller
2. How to set the OFF time
1. How to set the present time
3. How to set the ON time
4. How to set daily ON/OFF repeat timer
ADJUSTING THE AIRFLOW DIRECTION
USING THE 1-HOUROFF TIMER
1. 1-HourOFF Timer
TIPS FOR ENERGY SAVING
OPERATION WITHOUT THE REMOTE CONTROLLER
CARE AND CLEANING
When the air conditioner is not running
Cleaning the flaps
How to remove the air intake grille
How to remove the filter
Safety cord Air filter
Air intake grille hinge Safety cord
WIRED REMOTE CONTROLLER
TROUBLESHOOTING
BEFORE CALLING FOR SERVICE
OPERATING RANGE
Model No
SPECIFICATIONS
Outdoor Unit
Indoor Unit
•For Multiple use
•For Multiple use
Model No
Indoor Unit
APPENDIX B
INSTALLATION INSTRUCTIONS
3. HOW TO INSTALL THE INDOOR UNIT
Contents
4. HOW TO INSTALL THE OUTDOOR UNIT
7.REMOTE CONTROLLER INSTALLATION
In Case of Improper Installation
SPECIAL PRECAUTIONS
When Transporting
When Installing…
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
2-1.Indoor Unit
2. Installation Site Selection
AVOID
Fig.
Fig. CU-KS12NK1A
2-2.Outdoor Unit AVOID
Fig. 4a
CU-KS18NKU, CU-KS18NKUA
Front
Back
Fig. 5c
Air Discharge Baffle
Air Intake Baffle
1Recommended dimensions of the baffle plates
CU-KS12NK1A
Air Intake Baffle
1Recommended dimensions of the baffle plates
Air Discharge Baffle
CU-KS18NKUA
1. Air Intake Baffle
3 Installation procedure CU-KS12NK1A
2.Air Discharge Baffle
Fig. 5h
CU-KS18NKUA
4 Precautions for installation
1. Air Intake Baffle
2. Air Discharge Baffle
3-1.Preparation for Suspending
3. How to Install the Indoor Unit
3-2.Suspending the Indoor Unit
3-3.Placing the Unit Inside the Ceiling
Do not use natural drainage
3-4.Installing the Drain Piping
Fig.
Fig.
3-6-1.Before Installing the Ceiling Panel
3-6.How to Install the Ceiling Panel
3-5.Checking the Drainage
Fig. 6-10a
Fig.
3-6-2.Installing the Ceiling Panel
Fig.
Fig.
Fig.
3-6-3.Wiring the Ceiling Panel and the Indicator
Fig.
A. Attaching the corner cover
3-6-7.Adjusting the Auto Flap
3-6-5.Checking After Installation
3-7.Wiring Instructions
General precautions on wiring
WIRING SYSTEM DIAGRAM CU-KS12NK1A
Each wire must be firmly connected
Table
Otherwise, electrical shock may occur
How to connect wiring to the terminal
3-9.Wiring Instructions for Inter-unitConnections
For solid core wiring or F-cable
Fig.
For stranded wiring
4. How to Install the Outdoor Unit
4-1.Wiring Instructions for 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
5-5.Insulation of Refrigerant Tubing
Table
Fig.
Fig.
5-7.Finishing the Installation
6. Air Purging
5-6.Taping the Tubes
Air Purging with a Vacuum Pump for Test Run
Be sure to completely insert the hex
Table
wrench before attempting to turn the valve
Fig.
How to Test Run the Air Conditioner
Fig. Fig.
Fig.
Pump Down
Basic Functions of the Service Valves
ing the service valve
Pump Down Procedure
7. Remote Controller Installation Position
Service Valve Connections
Remote control holder
Table
8-1.Address Setting of the Remote Controller
8. Address Switch
Fig.
Fig.
Page
APPENDIX C
CZ-RD515U
Operating Instructions
Model No. CZ-RD515U
Operating Instructions Wired Remote Controller
CONTENTS
FEATURES
SAFETY PRECAUTIONS
PRODUCT INFORMATION
SAFETY INSTRUCTIONS
INSTALLATION LOCATION
ELECTRICAL REQUIREMENTS
Avoid
Temperature setting buttons TEMP
REMOTE CONTROLLER
Timer and Present Time setting buttons
Display
TIMER SELECT button
1 HR. TIMER button 1-HOUROFF TIMER
AUTO
HEAT
REMOTE CONTROLLER DISPLAY
Symbols
1Operation mode AUTO only for COOL/DRY/HEAT Model
only for COOL/DRY/HEAT Model
1.Automatic Operation
2. Manual Operation
OPERATION WITH THE REMOTE CONTROLLER
Remote Controller Display
3. Adjusting the Fan Speed
4. Fan Only
5. Night Setback Mode
SETTING THE TIMER
5. Backup function
1. How to set the present time
2. How to set the OFF time
ADJUSTING THE AIRFLOW DIRECTION
USING THE 1-HOUROFF TIMER
1. 1-HourOFF Timer
Setting procedure
Page
APPENDIX D
INSTALLATION INSTRUCTIONS
CZ-RD515U
Parts supplied with the remote controller
INSTALLATION INSTRUCTIONS Wired Remote Controller
Remote controller installation guidelines
How to install the remote controller
B. Installing directly onto the wall
A. Installing with in-walljunction box
Fig. 2-a
Fig. 2-b
Fig.
How to wire the remote controller
Fig. 8-a
Fig.
Fig.
How to Test Run the Air Conditioner
Fig.
Fig. WI1011-0 Printed in China
Page
DC1111-0
