National CS-MK120AKH - User Manual

Questions and Answers

B
Benjamin ReyesAug 13, 2025
Why is the cooling or heating effect poor in my National CS-MK120AKH Air Conditioner?
- A
  Amy WatkinsAug 13, 2025
  If your National Air Conditioner isn't cooling or heating effectively, check a few things: Ensure the air filters are clean. Make sure nothing is blocking the air inlet or outlet of either the indoor or outdoor units. Verify that the temperature setting is appropriate for your needs. Confirm that all windows and doors are closed tightly. Finally, check that the airflow rate and direction are set correctly.
M
Michael GibbsAug 17, 2025
What to do if National CS-MK120AKH Air Conditioner does not operate?
- K
  Kristi PetersonAug 17, 2025
  If your National Air Conditioner isn't turning on and the operation lamp is off, check the following: Verify that a breaker hasn’t been turned OFF or a fuse hasn’t blown. Ensure there isn't a power failure in your area. Check if the batteries are correctly placed in the remote controller. Confirm that the address switch in the remote controller is set correctly. Finally, make sure the timer setting is correct.
J
James KellyAug 20, 2025
What to do if National CS-MK120AKH Air Conditioner stops suddenly and the operation lamp blinks?
- A
  Amber NashAug 20, 2025
  If your National Air Conditioner suddenly stops and the operation lamp is blinking, you should: Clean the air filters or remove any obstacles that might be blocking the unit. Turn the breaker OFF, then turn it back ON. Try operating the air conditioner again using the remote controller. If the lamp continues to blink after these steps, it is recommended to call the service shop where you bought the air conditioner.
R
Robert WallaceAug 25, 2025
How to get rid of the odour from National CS-MK120AKH Air Conditioner indoor unit?
- J
  jeremyterryAug 25, 2025
  If your National Air Conditioner's indoor unit is emitting an odor, it is recommended to have the indoor unit professionally cleaned by a technician. Consult the service shop where you purchased the air conditioner for assistance.
M
Mark TapiaAug 28, 2025
Why does mist come out of the National Air Conditioner indoor unit?
- T
  Thomas RamosAug 28, 2025
  The mist coming from the indoor unit of your National Air Conditioner is likely due to the room air being cooled into mist by the cold airflow during cooling operation.
N
Nicolas BrownSep 1, 2025
Why does my National Air Conditioner outdoor unit emit water or steam?
- M
  michaellaraSep 1, 2025
  The water or steam coming from the outdoor unit of your National Air Conditioner is likely due to moisture in the air condensing into water on the cool surface of the outdoor unit piping, which then drips.
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Richard JohnsonSep 4, 2025
Why does the outdoor fan of my National Air Conditioner keep rotating when it is not in operation?
- O
  oconnorjeffreySep 4, 2025
  The outdoor fan in your National Air Conditioner continues to rotate for an additional 30 seconds after the unit is not in operation for system protection.
M
Michael KnoxSep 8, 2025
Why National CS-MK120AKH operation does not start soon?
- J
  Juan BrownSep 8, 2025
  If your National Air Conditioner doesn't start immediately, you should wait for approximately 3 minutes.

Summary

Safety Precautions

General Operation Warnings

Key safety warnings regarding power cord, air outlets, repairs, preservation, and cleaning.

Safety Cautions for Usage

Cautions on wet hands, unit stability, water washing, appliance placement, and ventilation.

Installation Guide

Installation Site Selection

Guidance on choosing suitable locations for indoor and outdoor units, considering environment and noise.

Electrical Requirements

Instructions for dedicated power supply circuits and earthing for the air conditioner.

System Relocation Advice

Information on consulting a service shop for moving or remodeling the air conditioner.

Indoor Unit Components

Indoor Unit Parts Identification

Labels and descriptions of internal and external parts of the indoor unit.

Opening the Front Grille

Step-by-step guide on how to open the front grille for maintenance access.

Outdoor Unit and Remote Controller

Outdoor Unit Components

Identification of parts for the outdoor unit, including piping and drain hose.

Remote Controller Overview

Explanation of the remote control buttons and display for different models.

Remote Controller Preparation

Remote Controller Battery Installation

Instructions for inserting and replacing batteries in the remote controller.

Remote Controller Operation

Guidelines for aiming the transmitter and ensuring effective communication.

Remote Controller Holder Mounting

Steps for fixing the remote controller holder onto a wall or pillar.

Indoor Unit Setup

Installing Air Purifying Filters

Procedure for attaching air purifying filters to the air filters.

Setting the Unit Clock

Instructions on how to set the current time on the air conditioner.

Powering On the Unit

Final step to turn on the main breaker after initial setup.

Air Conditioner Operation Modes

DRY, COOL, and FAN Modes

How to select and operate the different modes of the air conditioner.

Temperature Setting Adjustment

Procedure for raising or lowering the desired temperature setting.

Air Flow Rate Adjustment

How to change the fan speed for the airflow.

POWERFUL Operation Activation

How to use the POWERFUL button for maximum cooling or heating effect.

Air Flow Direction Control

Adjusting Horizontal Flap

Instructions for controlling the up/down movement of the air outlet flap.

Adjusting Vertical Louvre

Instructions for controlling the left/right movement of the air outlet louvre.

Timer Operation Functions

Setting the OFF Timer

How to set the air conditioner to turn off automatically.

Setting the ON Timer

How to set the air conditioner to turn on automatically.

Combining ON and OFF Timers

Procedure for setting both ON and OFF timers simultaneously.

Air Conditioner Care and Cleaning

Cleaning Air Filters

Instructions for regular cleaning of the main air filters.

Cleaning Units and Remote

General advice for cleaning the indoor/outdoor units and the remote controller.

Replacing Air Purifying Filters

Guidance on when and how to replace air purifying filters.

Front Grille Maintenance and Checks

Cleaning the Front Grille

Steps for removing, cleaning, and reattaching the front grille.

Pre-Storage Checks

Points to check on the unit and its surroundings before a long idle period.

Idle Period Preparation

Procedure for preparing the unit for storage during long periods of non-use.

Troubleshooting Common Issues

Non-Trouble Situations

Explanation of common occurrences that are not actual malfunctions.

Unit Fails to Operate

Checks to perform when the air conditioner does not start.

Poor Cooling or Heating

Troubleshooting steps for reduced performance in cooling or heating.

Sudden Operation Stops

What to do when the unit stops unexpectedly during operation.

Troubleshooting Service Requirements

When to Call Service

Critical symptoms that require immediate professional service.

Post Power Failure Behavior

How the unit resumes operation after a power failure.

Lightning Protection

Precautions and actions to take during lightning events.

Periodic Maintenance Recommendation

Importance of professional maintenance for long-term performance.

National CS-MK120AKH Specifications

General

Brand	National
Model	CS-MK120AKH
Category	Air Conditioner
Language	English