Troubleshooting - Samsung AW-1407B Service Manual

5. Troubleshooting

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5-1 Troubleshooting Method and Precautions
5-1-1 Checking of power source
Check to see whether the voltage of the power source is 220V(203~230), 60Hz.
The air conditioner may not operate properly if the voltage is out of this range.
5-1-2 Check the parts that be weak or fragile
5-1-3 Check the terminals for proper connection
5-1-4 Refer to the table below when there is any malfunction;
No Trouble
The compressor does
¤
not operate.
The motor does not
¤Ł
operate.
The cooling capacity
¤Ø
is low.
Noise
¤Œ
Samsung Electronics
Check to see whether the electric circuit or electric parts are damaged before
repairing the air conditioner.
Conduct the following generally to check whether the electric circuit or other
electric parts are damaged.
Checkpoints
1. Check the position of the thermostat.
2. Check the connection of the lead wire.
3. Check the overload protector.
4. Check the compressor.
1. Check the connection of the lead wire
and switch.
2. Check the motor.
1. Check the refrigerant for leak.
2. Check the evaporator condition.
(freezing, clogging with dust, etc.)
¡ The temperature difference between
the air inlet side and air outlet side
should be 12¡ at the minimum.
¡ Standard state
Indoor : 27¡ , Outdoor : 35¡
1. Check the vibration of the pipe.
2. Check the propeller fan and blower for
looseness and weakness.
3. Check the motor bearing for noise.
4. Compare the compressor noise with
other compressors.
Procedures
1. The setting temperature is higher than
the room temperature
2. Lead wire disconnected.
3. O.L.P. damaged.
4. Compressor damaged.
1. Lead wire disconnected.
2. Switch damaged.
3. Motor damaged.
1. The leak is caused by a pipe crack.
2. Shortage of the refrigerant.
3. Clean the evaporator, and air filter.
1. The pipe is in contact with other parts.
2. The tightening of the hexagon
nut is faulty.
3. Damage of the motor.
4. Damage of the compressor.
Possible cause
5-1