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Air Conditioner
Panasonic
CS-KS18NKU, CU-KS18NKU
service manual
Models:
CS-KS18NKU
CU-KS18NKU
1
121
122
122
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122 pages
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Specs
Electrical Characteristics
Install
Refrigerant Flow Diagram
Timer backup
Wired Remote Controller
Dimension
Maintenance
Method of Self-Diagnostics
WHT 1P-CONNECTORWHT
Page 121
Image 121
Page 120
Page 122
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Contents
DC Inverter Split System AIR Conditioner
Safety Precautions
Prohibit
Table of Contents
Appendix a
Models CS-KS18NKU + CU-KS18NKU
Operating Range
CS-KS24NKU + CU-KS24NKU
Models CS-KS18NKU + CU-KS18NKUA
Unit Specifications
Specifications
CS-KS18NKU
CU-KS18NKU
208V
CU-KS24NKU
CS-KS24NKU
12.1
CU-KS18NKUA
15 1.2 to
Dimen
Outdoor Unit CU-KS24NKUA 230V
CU-KS24NKUA
Indoor Unit
Major Component Specifications
Indoor Unit CS-KS18NKU
CB-CS-KS24NKU
Indoor Unit CS-KS24NKU
Outdoor Unit CU-KS18NKU
Outdoor Unit
Outdoor Unit CU-KS24NKU
Outdoor Unit CU-KS18NKUA
Outdoor Unit CU-KS24NKUA
CS-KS18NKU CS-KS24NKU
Other Component Specifications
CU-KS18NKU CU-KS24NKU CU-KS18NKUA CU-KS24NKUA
Dimensional Data
23-15/165-11/32
852-0-0010-119-00-0
Refrigerant Flow Diagram
Refrigerant Flow Diagram
Insulation of Refrigerant Tubing
CS-KS24NKU CU-KS18NKUA CU-KS24NKUA
Performance Data
Temperature Charts
Indoor Unit CS-KS18NKU Outdoor Unit CU-KS18NKUA
Indoor Unit CS-KS24NKU Outdoor Unit CU-KS24NKU
Indoor Unit CS-KS24NKU Outdoor Unit CU-KS24NKUA
Cooling Capacity
Power Supply 230V Single Phase 60Hz Cooling Capacity
Outdoor Unit CU-KS18NKU / CU-KS18NKUA
Outdoor Unit CU-KS24NKU / CU-KS24NKUA
SHC
Cooling Capacity Low Ambient
15,690 20,420
Air Throw Distance Charts
Cooling
Electrical Data
Electrical Characteristics
CS-KS24NKU
Indoor Unit CS-KS18NKU CS-KS24NKU
Electric Wiring Diagrams
8FA2-5251-11000-2
BLK
Outdoor Unit CU-KS18NKU CU-KS18NKUA
RED
WHT 1P-CONNECTORWHT
Address Setting of the Remote Control Unit
Maintenance
How to Connect
How to Disconnect
Operation Functions
Functions
Emergency operation
PAM- control
Lamp colors
Timer backup
Protective Functions
Compressor discharge temperature control
Freeze prevention
CT Peak current cut-off control
Precautions before Performing Inspection or Repair
Troubleshooting Before Calling for Service
Method of Self-Diagnostics
Code Diagnosis Contents
Self-diagnostics Lamps
Replace the controller
Normal
Replace the circuit board or the fuse
Checking the Indoor and Outdoor Units
Using the TEST/T-RUN terminals
Checking the indoor unit Control Check items unit operation
Before the Operation
Serial Communication Error Identification Procedure
Off Blinking Illuminated
Condition E01
From the previous page a
Condition E12
Indoor Fan Motor
Trouble Diagnosis of Fan Motor
CU-KS24NKU / CU-KS24NKUA
Outdoor Fan Motor
Noise malfunction
Noise Malfunction and Electromagnetic Interference
Electromagnetic interference
Checking Electrical Components
Power Supply Cord
Measurement of Insulation Resistance
Measurement of Insulation Resistance for Electrical Parts
Checking Continuity of Fuse on PCB Assy
Characteristics of New Refrigerant R410A
Refrigerant R410A Special Precautions When Servicing Unit
What is New Refrigerant R410A?
Characteristics
Checklist before Servicing
Tools Specifically for R410A
Tubing Installation Procedures
Case of Compressor Malfunction
Procedure for Replacing Compressor
Unit. This may cause
Never charge a large amount
Damage to the compressor
Amount in the charging cylinder is less than 20%
Welding leaking points
Case Refrigerant is Leaking
Recharging
Charging Additional Refrigerant
When Tubes are Extended
Retro-Fitting Existing Systems
Use of Existing Units
Appendix a Operating Instructions
Operating Instructions Split System Air Conditioner
Contents
Features
Safety Precautions
Product Information
Safety Instructions
Installation Location
Electrical Requirements
Page
Indoor Unit
Names of Parts
Outdoor Unit
Unit Display and Operation Button
Green and FAN green mode
Quiet lamp
Remote Controller Display
Hour OFF Timer
Remote Controller
On Time
OFF Time
DRY
Temp
Cool
FAN
How to Install Batteries
Using the Remote Controller
ACL button ALL Clear
Use a thin object such as the tip of a pen to press
Receiver which could block the signal
To take out the remote controller, pull it forward
Rear Side Hole
Controller
Step
Operation with the Remote Controller
Press the ON/OFF operation button
Operation with the Remote Controller
Night Setback Mode
Quiet Mode
Special Remarks
Power failure during operation
Clicking sound is heard from the air conditioner
Example To set to 1030 pm
Setting the Timer
Operation Indication
To cancel a timer program Press the Cancel button
How to set the on time Example To start operation at 710 am
1030 pm 710 am 1100 am
OFF
Setting procedure
Using the 1-HOUR OFF Timer
Cancellation procedure
Operation together with the Daily ON/OFF Repeat Timer
Cool Sweep DRY FAN
Adjusting the Airflow Direction
Care and Cleaning
Operation Without the Remote Controller
When the air conditioner is not running
Cyclically Cooling operation Stop
Groove Pin Air intake grille
How to remove the filter 1. Grasp both ends of the air
Washing the grille with water
Wired Remote Controller
Operating Range
Troubleshooting Before Calling for Service
Trouble Possible Cause Remedy
CU-KS18NKU, CU-KS18NKUA CS-KS18NKU
Specifications
852-6-4190-576-00-0
Contents
Installation Instructions Split System Air Conditioner
Please Read Before Starting
Accidentally
Fins of the outdoor unit. You may get injured
Accessories Supplied with Unit Table
Tools Required for Installation not supplied
General
Optional Copper Tubing Kit
Additional Materials Required for Installation
Installation Site Selection
Avoid
About
Baffle Plate for the Outdoor Unit CU-KSxxNKUA models only
Front Back
Air Discharge Baffle
Air Intake Baffle
Precautions for installation
Trical wiring or conduits are
How to Install the Indoor Unit
Remove the Rear Panel from the Unit
Make a Hole
If Wooden Wall
Install the Rear Panel on the Wall
If Block, Brick, Concrete or Similar Type Wall
How to remove the grille
Remove the Grille to Install the Indoor Unit
How to replace the grille
Shape the Indoor Side Tubing
Wiring Instructions General precautions on wiring
Wiring System Diagram
Recommended Wire Length and Diameter
Wiring Instructions for Inter-unit Connections
For Outdoor Unit For solid core wiring or F-cable
How to connect wiring to the terminal For Indoor Unit
For stranded wiring
Right-side tubing
Mounting
Left-side tubing
Switching drain hose and drain cap
Drain cap
Tubing and wiring to the out
Do not supply power to
To unmount indoor unit
Unit or operate it until all
First refer to . Installation Site Selection
How to Install the Outdoor Unit
Wiring Instructions for the Outdoor Unit
Refrigerant Tubing
Flaring Procedure with a Flare Tool
Use of the Flaring Method
Finishing the Installation
Connecting Tubing between Indoor and Outdoor Units
Insulation of Refrigerant Tubing
To prevent heat loss and wet floors due to dripping of con
Air Purging with a Vacuum Pump for Test Run
Air Purging
Tem. The valve core is similar to
Those used in automobile tires
Page
How to Test Run the Air Conditioner
Basic functions of the service valves are given in below
Basic Functions of the Service Valves
When opening or closing the service valve stem
External diameter of service port R410A 5/16
Remote Controller Installation Position
Service Valve Connections
Mounting on a Wall
Address Setting of the Remote Controller
Address Switch
Page
DC1111-0
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Contents