9-5. Noise Malfunction and Electromagnetic Interference

An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices.

A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur. Please pay attention to the points listed below.

(1) Noise malfunction

This refers to the application of high-frequency noise to the signal wires, resulting in abnormal signal pulses and malfunction.

Locations most susceptible to noise

Trouble

Correction

 

 

 

 

1.

Locations near broadcast stations where

Either of the following trouble may occur.

(The fundamental concept is to make the

 

there are strong electromagnetic waves

1. The unit may stop suddenly during

system less susceptible to noise.)

 

 

 

2.

Locations near amateur radio (short wave)

operation.

- Insulate for noise or

 

stations

2. Indicator lamps may flicker.

distance from the noise source. -

3.

Locations near electronic sewing machines

1. Use shielded wires.

 

 

and arc-welding machines

 

2. Move unit away from the noise source.

 

 

 

 

 

 

 

(2) Electromagnetic interference

This refers to noise generated by high-speed switching of the microcomputer and compressor. This noise radiates through space and returns to the electric wiring, affecting any wireless devices (televisions, radios, etc.) located nearby.

Locations most susceptible to noise

Trouble

 

Correction

 

 

 

 

1.

A television or radio is located near the

1. Noise appears in the television picture,

1. Select a separate power source.

 

A/C and A/C wiring.

or the picture is distorted.

2.

Keep the A/C and A/C wiring at least 1 meter

 

 

 

2.

The antenna cable for a television or

2. Static occurs in the radio sound.

 

away from wireless devices and antenna cables.

 

radio is located close to the A/C and A/C

 

3.

Change the wireless device’s antenna to a high-

 

wiring.

 

 

 

 

sensitivity antenna.

3.

Locations where television and radio

 

 

 

4.

Change the antenna cable to a BS coaxial cable.

 

signals are weak.

 

 

 

5.

Use a noise filter (for the wireless device).

 

 

 

 

 

 

6.

Use a signal booster.

 

 

 

 

 

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Panasonic CU-KS24NKUA Noise Malfunction and Electromagnetic Interference, Noise malfunction, Electromagnetic interference
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