Panasonic CS-PS18NKV User Manual (English)

Questions and Answers:

D
deborahmorganAug 22, 2025
Why is my Panasonic Air Conditioner's refrigeration cycle abnormal?
- R
  Richard ReedAug 22, 2025
  An abnormal refrigeration cycle in your Panasonic Air Conditioner can be caused by several factors: a refrigerant shortage due to leakage (inspect for leaks and recharge the refrigerant), poor compressor performance (check, repair, or replace the compressor), a closed 2/3 way valve (ensure the valve is open), or faulty indoor intake air or indoor pipe temperature sensors (replace faulty temperature sensors).
J
James WatsonAug 23, 2025
What to do if my Panasonic CS-PS18NKV Air Conditioner shows indoor high pressure protection?
- E
  elizabethrodriguezAug 23, 2025
  If your Panasonic Air Conditioner is showing an indoor high pressure protection error, this may be due to several reasons. The air filter of the indoor unit might be clogged (inspect and clean or replace the air filter). There might be dust accumulation on the indoor unit heat exchanger (clean the heat exchanger). An air short circuit could be present (check and resolve airflow obstructions). A faulty indoor pipe temperature sensor may cause a detection error (replace the defective temperature sensor), as well as a faulty indoor unit PCB (check and replace the primary PCB).
Q
qrussoAug 25, 2025
Why is my Panasonic CS-PS18NKV compressor overheating?
- S
  susan48Aug 26, 2025
  Your Panasonic Air Conditioner compressor might be overheating due to a refrigerant shortage caused by a leak (inspect for leaks and recharge refrigerant), a closed 2/3 way valve (ensure the valve is open), or a detection error from a faulty compressor tank temperature sensor (replace the faulty temperature sensor).
B
bradleycoleAug 27, 2025
Why does my Panasonic Air Conditioner activate indoor freeze prevention in cooling or soft dry mode?
- H
  hillalbertAug 27, 2025
  The activation of indoor freeze prevention in cooling or soft dry mode in your Panasonic Air Conditioner can occur due to a clogged air filter in the indoor unit (inspect and clean or replace the air filter), dust accumulation on the indoor unit heat exchanger (clean the heat exchanger), an air short circuit (check and resolve airflow obstructions), a detection error from a faulty indoor pipe temperature sensor (replace the defective temperature sensor), or a detection error from a faulty indoor unit PCB (check and replace the primary PCB).
R
Robert BurgessAug 27, 2025
What causes refrigeration cycle abnormality in Panasonic CS-PS18NKV?
- J
  Joshua OliverAug 27, 2025
  Refrigeration cycle abnormality in Panasonic Air Conditioner can be caused by refrigerant shortage (refrigerant leakage) - inspect for leaks and recharge refrigerant. It can also be caused by poor compression performance of compressor - check and repair or replace the compressor; 2/3 way valve closed - ensure valve is open; detection error due to faulty indoor intake air or indoor pipe temperature sensors - replace faulty temperature sensors.
D
Darryl MillerAug 29, 2025
What causes input over current detection in my Panasonic CS-PS18NKV?
- M
  Michael DavisAug 29, 2025
  Input over current detection in your Panasonic Air Conditioner can be due to several reasons: over-current caused by compressor failure (inspect and repair or replace the compressor), a defective outdoor unit PCB (check and replace the outdoor PCB), a defective inverter main circuit electrolytic capacitor (inspect and replace defective capacitors), or excessive refrigerant (check for proper refrigerant levels).
A
angela96Aug 30, 2025
What causes cooling high pressure abnormality in Panasonic Air Conditioner?
- B
  Brianna CarlsonAug 30, 2025
  Cooling high pressure abnormality in Panasonic Air Conditioner can be caused by outdoor pipe temperature rise due to short circuit of hot discharge air flow - inspect airflow paths and external obstructions. It can also be caused by outdoor pipe temperature rise due to defective of outdoor fan motor - check and repair or replace fan motor; outdoor pipe temperature rise due to defective outdoor pipe temperature sensor - replace the faulty temperature sensor; outdoor pipe temperature rise due to defective outdoor unit PCB - check and replace the outdoor PCB.
L
laurenbaldwinAug 31, 2025
How to fix abnormal communication between indoor and outdoor units on a Panasonic Air Conditioner?
- C
  christopher92Aug 31, 2025
  Abnormal communication between the indoor and outdoor units of your Panasonic Air Conditioner could be due to a faulty indoor unit PCB (check and replace indoor unit PCB), a faulty outdoor unit PCB (check and replace outdoor unit PCB), a signal transmission error due to wrong wiring (verify and correct wiring connections), a signal transmission error due to broken wires (inspect and repair broken wires), or a signal transmission error due to a disturbed power supply waveform (investigate power supply issues).
M
Mr. Jordan LeeSep 2, 2025
What does output over current detection mean on a Panasonic Air Conditioner?
- R
  Robert RiceSep 2, 2025
  Output over current detection on your Panasonic Air Conditioner suggests a DC peak due to compressor failure (inspect and repair or replace the compressor), a DC peak due to defective power transistor(s) (check and replace the power transistors), or a DC peak due to a defective outdoor unit PCB (check and replace the outdoor PCB).
F
frazierjanetSep 3, 2025
Why is there a capacity rank mismatch between indoor and outdoor units on my Panasonic CS-PS18NKV Air Conditioner?
- C
  Craig KirbySep 3, 2025
  A capacity rank mismatch between the indoor and outdoor units of your Panasonic Air Conditioner can occur if wrong models are interconnected (confirm correct model compatibility), wrong indoor or outdoor unit PCBs are mounted (ensure correct PCBs are installed), indoor or outdoor unit PCBs are defective (check and replace defective PCBs), there's a signal transmission error due to wrong wiring (verify and correct wiring connections), or a signal transmission error due to broken wires (inspect and repair broken wires).

Panasonic CS-PS18NKV Specifications

General

Refrigerant	R32
Compressor Type	Rotary
Type	Split System
Power Supply	230 V / 50 Hz
Noise Level (Indoor)	21 dB
Indoor Noise Level	21 dB

Summary

Safety Precautions

Technical Specifications

Controls and Components Location

Indoor Unit Controls and Components

Identifies controls and components within the indoor unit for easy access and reference.

Outdoor Unit Controls and Components

Details the location of controls and components found on the outdoor unit.

Remote Control Layout and Functions

Explains the arrangement and functionality of the remote control unit.

Unit Dimensions

Indoor Unit Dimensions

Provides detailed physical measurements for the indoor unit models.

Outdoor Unit Dimensions

Provides detailed physical measurements for the outdoor unit models.

Refrigeration Cycle Diagrams

Refrigeration Cycle: PS9/PS12 Models

Illustrates the refrigeration cycle for CS-PS9/12NKV and CU-PS9/12NKV units.

Refrigeration Cycle: PS18/PS24 Models

Illustrates the refrigeration cycle for CS-PS18/24NKV and CU-PS18/24NKV units.

Block Diagrams

Block Diagram: CS-PS9NKV CU-PS9NKV

Presents the electrical block diagram for CS-PS9NKV and CU-PS9NKV units.

Block Diagram: CS-PS12NKV CU-PS12NKV

Presents the electrical block diagram for CS-PS12NKV and CU-PS12NKV units.

Block Diagram: CS-PS18NKV CU-PS18NKV

Presents the electrical block diagram for CS-PS18NKV and CU-PS18NKV units.

Block Diagram: CS-PS24NKV CU-PS24NKV

Presents the electrical block diagram for CS-PS24NKV and CU-PS24NKV units.

Wiring Connection Diagrams

Indoor Unit Wiring Connections

Details the wiring connections for the indoor unit, including terminal board and controller.

Outdoor Unit Wiring Connections

Details the wiring connections for the outdoor unit, including sensors and compressor.

Electronic Circuit Diagrams

Indoor Unit Electronic Circuit

Illustrates the electronic circuit diagram of the indoor unit, showing components and connections.

Outdoor Unit Electronic Circuit

Illustrates the electronic circuit diagram of the outdoor unit, including sensors and power stages.

Printed Circuit Board Layouts

Indoor Unit PCB Layout

Shows the component layout and connection points on the indoor unit's main PCB.

Outdoor Unit PCB Layouts

Shows the component layout and connection points on the outdoor unit's main PCB.

Installation Instructions

Selecting the Best Installation Location

Guidelines for choosing the optimal location to install the indoor and outdoor units.

Indoor Unit Installation Procedures

Step-by-step instructions for mounting and connecting the indoor unit.

Outdoor Unit Installation Procedures

Step-by-step instructions for mounting and connecting the outdoor unit.

Operation Control and Functions

Basic Operating Functions

Explains the fundamental operating modes and inverter control logic.

Indoor Fan Motor Operation Modes

Details the manual and auto fan speed control for the indoor unit.

Outdoor Fan Motor Operation

Describes the operation sequence of the outdoor fan motor relative to the compressor.

Airflow Direction Control

Explains manual and automatic control of vertical and horizontal airflow directions.

Timer Control Functions

Covers the setup and operation of ON and OFF timers for scheduling.

Auto Restart and Indication Panel

Explains the auto restart feature and the meaning of the unit's indicator lights.

Protection Control Mechanisms

Compressor Restart and Forced Operation Controls

Covers time delay restart and 30-second forced operation for compressor protection.

Current and IPM Protection Controls

Details protection against total running current issues and IPM overheating.

Low Pressure and Tank Temperature Protection

Explains protection against low pressure (gas leakage) and compressor tank temperature rise.

Frequency and Temperature Based Protections

Covers low frequency protection, outdoor temp control, and cooling overload.

Freeze, Dew, and Odor Prevention Controls

Describes freeze prevention, dew prevention, and odor cut control functions.

Servicing Mode Operations

Auto Off/On Button Servicing Functions

Explains how to use the Auto Off/On button for auto operation, test run, and mode switching.

Remote Control Servicing Functions

Details specific button functions on the remote for setting codes and display modes.

Troubleshooting Guide

Refrigeration Cycle Troubleshooting

Diagnoses malfunctions by checking air temperatures, electric current, and gas pressure.

Breakdown Self-Diagnosis and Error Codes

Guides users through self-diagnosis, error code display, and clearing procedures.

Troubleshooting Flowcharts

Provides step-by-step flowcharts for diagnosing common error codes like H11 and H12.

Disassembly and Assembly Instructions

Indoor Unit Disassembly: CS-PS9/12NKV

Step-by-step guide for removing the front grille and electronic controller.

Indoor Unit Disassembly: CS-PS18/24NKV

Step-by-step guide for removing front grille and electronic controller for PS18/24 models.

Technical Data

CS-PS9NKV CU-PS9NKV Operation Characteristics

Presents cooling characteristics vs. outdoor air temperature for PS9/PS12 models.

CS-PS9NKV CU-PS9NKV Piping Length Characteristics

Shows how piping length affects performance for PS9/PS12 models.

CS-PS12NKV CU-PS12NKV Operation Characteristics

Presents cooling characteristics vs. outdoor air temperature for PS12 models.

CS-PS12NKV CU-PS12NKV Piping Length Characteristics

Shows how piping length affects performance for PS12 models.

CS-PS18NKV CU-PS18NKV Operation Characteristics

Presents cooling characteristics vs. outdoor air temperature for PS18 models.

CS-PS18NKV CU-PS18NKV Piping Length Characteristics

Shows how piping length affects performance for PS18 models.

CS-PS24NKV CU-PS24NKV Operation Characteristics

Presents cooling characteristics vs. outdoor air temperature for PS24 models.

CS-PS24NKV CU-PS24NKV Piping Length Characteristics

Shows how piping length affects performance for PS24 models.

Exploded Views and Parts Lists

Indoor Unit Exploded View/Parts: PS9/PS12 Models

Exploded view diagram and parts list for indoor units CS-PS9NKV and CS-PS12NKV.

Indoor Unit Exploded View/Parts: PS18/PS24 Models

Exploded view diagram and parts list for indoor units CS-PS18NKV and CS-PS24NKV.

Outdoor Unit Exploded View/Parts: CU-PS9NKV

Exploded view diagram and parts list for outdoor unit CU-PS9NKV.

Outdoor Unit Exploded View/Parts: CU-PS12NKV

Exploded view diagram and parts list for outdoor unit CU-PS12NKV.

Outdoor Unit Exploded View/Parts: CU-PS18NKV

Exploded view diagram and parts list for outdoor unit CU-PS18NKV.

Outdoor Unit Exploded View/Parts: CU-PS24NKV

Exploded view diagram and parts list for outdoor unit CU-PS24NKV.

Related product manuals

Panasonic CS-PS18NKV User Manual

Table of Contents

Questions and Answers:

Panasonic CS-PS18NKV Specifications

Summary

Safety Precautions

Technical Specifications

Controls and Components Location

Indoor Unit Controls and Components

Outdoor Unit Controls and Components

Remote Control Layout and Functions

Unit Dimensions

Indoor Unit Dimensions

Outdoor Unit Dimensions

Refrigeration Cycle Diagrams

Refrigeration Cycle: PS9/PS12 Models

Refrigeration Cycle: PS18/PS24 Models

Block Diagrams

Block Diagram: CS-PS9NKV CU-PS9NKV

Block Diagram: CS-PS12NKV CU-PS12NKV

Block Diagram: CS-PS18NKV CU-PS18NKV

Block Diagram: CS-PS24NKV CU-PS24NKV

Wiring Connection Diagrams

Indoor Unit Wiring Connections

Outdoor Unit Wiring Connections

Electronic Circuit Diagrams

Indoor Unit Electronic Circuit

Outdoor Unit Electronic Circuit

Printed Circuit Board Layouts

Indoor Unit PCB Layout

Outdoor Unit PCB Layouts

Installation Instructions

Selecting the Best Installation Location

Indoor Unit Installation Procedures

Outdoor Unit Installation Procedures

Operation Control and Functions

Basic Operating Functions

Indoor Fan Motor Operation Modes

Outdoor Fan Motor Operation

Airflow Direction Control

Timer Control Functions

Auto Restart and Indication Panel

Protection Control Mechanisms

Compressor Restart and Forced Operation Controls

Current and IPM Protection Controls

Low Pressure and Tank Temperature Protection

Frequency and Temperature Based Protections

Freeze, Dew, and Odor Prevention Controls

Servicing Mode Operations

Auto Off/On Button Servicing Functions

Remote Control Servicing Functions

Troubleshooting Guide

Refrigeration Cycle Troubleshooting

Breakdown Self-Diagnosis and Error Codes

Troubleshooting Flowcharts

Disassembly and Assembly Instructions

Indoor Unit Disassembly: CS-PS9/12NKV

Indoor Unit Disassembly: CS-PS18/24NKV

Technical Data

CS-PS9NKV CU-PS9NKV Operation Characteristics

CS-PS9NKV CU-PS9NKV Piping Length Characteristics

CS-PS12NKV CU-PS12NKV Operation Characteristics

CS-PS12NKV CU-PS12NKV Piping Length Characteristics

CS-PS18NKV CU-PS18NKV Operation Characteristics

CS-PS18NKV CU-PS18NKV Piping Length Characteristics

CS-PS24NKV CU-PS24NKV Operation Characteristics

CS-PS24NKV CU-PS24NKV Piping Length Characteristics

Exploded Views and Parts Lists

Indoor Unit Exploded View/Parts: PS9/PS12 Models

Indoor Unit Exploded View/Parts: PS18/PS24 Models

Outdoor Unit Exploded View/Parts: CU-PS9NKV

Outdoor Unit Exploded View/Parts: CU-PS12NKV

Outdoor Unit Exploded View/Parts: CU-PS18NKV

Outdoor Unit Exploded View/Parts: CU-PS24NKV

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