9. Troubleshooting

9-1 Items to be checked first

1.The input voltage should be rating voltage ±10% range.

The air conditioner may not operate properly if the voltage is out of this range.

2.Is the link cable linking the indoor unit and the outdoor unit linked properly? The indoor unit and the outdoor unit shall be linked by 4 wires.

2 wires are for power and other 2 wires are for communication, total 4 wires on each indoor unit. Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables and if connecting position on the terminal is correct. Otherwise the air conditioner may not operate properly.

3.When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the air conditioner.

No

 

 

Operation of air conditioner

 

Explanation

 

 

 

 

 

1

In a COOL operation mode, the compressor does not

In happens after a delay of 3 minutes when the compressor

 

operate at a room temperature higher than the setting

is reoperated. The same phenomenon occurs when a power

 

temperature that the INDOOR FAN should operate.

is on.

 

In a HEAT operation mode, the compressor does not

As a phenomenon that the compressor is reoperated after a

 

operate at a room temperature lower than the setting

delay of 3 minutes, the indoor fan is adjusted automatically with

 

temperature that indoor fan should operate.

 

reference to a temperature of the air blew

 

 

 

 

 

 

2

Fan speed setting is not allowed in AUTO(

) or

The speed of the indoor fan is set to LL in DRY mode.

 

DRY(

) mode.

 

Fan speed is 5 steps and is selected automatically in AUTO

 

 

 

 

 

 

mode.

 

 

 

 

 

 

3

Compressor stops operation intermittently in

 

Compressor operation is controlled automatically in DRY mode

 

DRY(

) mode.

 

depending on the room temperature and humidity.

 

 

 

 

 

4

Compressor of the outdoor unit is operating although

When the unit is turned off while de-ice is activated, the

 

it is turned off in a HEAT mode.

 

compressor continues operation for up to 12 minutes (maxi­

 

 

 

 

 

 

mum) until the deice is completed.

 

 

 

 

 

5

Timer LED(

 

) only of the indoor unit lights up and

Timer is being activated and the unit is in ready mode.

 

 

 

the air conditioner does not operate.

 

The unit operates normally if the timer operation is cancelled.

 

 

 

 

 

6

The compressor and indoor fan stop intermittently in

The compressor and indoor fan stop intermittently if room

 

HEAT mode.

 

 

 

temperature exceeds a setting temperature in order to protect

 

 

 

 

 

 

the compressor from overheated air in a HEAT mode.

 

 

 

 

 

 

7

Indoor fan and outdoor fan stop operation

 

The compressor operates in a reverse cycle to remove

 

intermittently in a HEAT mode.

 

exterior ice in a HEAT mode, and indoor fan and outdoor fan

 

 

 

 

 

 

do not operate intermittently for within 20% of the total heater

 

 

 

 

 

 

operation.

 

 

 

 

 

 

8

The compressor stops intermittently in a

 

The compressor stops intermittently or the fan speed of the

 

COOL mode or DRY mode, and fan speed of the

indoor unit decreases to prevent inside/outside air frozen

 

indoor unit decreases.

 

depending on the inside/outside air temperature.

 

 

 

 

 

 

 

9-1

Samsung Electronics

Page 71
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Samsung MH026FNCA service manual Troubleshooting

MH026FNCA specifications

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