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What is a computer?

Definition

Computer comes from the Latin computare which mean count. Because the extent of arable fields of computer science, experts and researchers in defining termininologi slightly different computer.

* According to Hamacher [1], the computer is an electronic calculating machine that quickly and can receive a digital input information, then process them in accordance with programs stored in memory, and generate output information.
* According Blissmer [2], the computer is an electronic device that can perform several tasks as follows:
- Receives input
- Processing the last input in accordance with the program
- Keep the commandments and the results of processing
- Provides the output in the form of information
* Sedangan Fuori [3] argued that the computer is a data processor that can perform large calculations quickly, including the calculation of arithmetic and logic operations, without intervention from humans.

To realize the conception of computers as data processing to produce an information, then the required computer system (computer system) that its elements consist of hardware, software and brainware. The three elements of the computer system should be interconnected and form a unity. Hardware will not work if without the software, and vice versa. And both are not useful when there is no human (brainware) who operate and control it.

1. Hardware or Hardware: equipment that is physically visible and can djamah.
2. Software or Software: programs that provide instructions / commands to perform data processing.
3. Brainware: people who operate and control computer system.

Classification of Computers

Recent literature on the computer doing computer based classification tigal things: data processing, use, capacity / size, and generation.

Based Data Processed

1. Analog Computer
2. Digital Computer
3. Hybrid Computer

Based on its consumer

1. Computers For Special Purpose (Special Purpose Computer)
2. Computers for General Purpose (General Purpose Computer)

Based on the capacity and size

1. Micro Computer (Micro Computer)
2. Computer Mini (Mini Computer)
3. Small Computer (Small Computer)
4. Computer Medium (Medium Computer)
5. Computer Large (Large Computer)
6. Super Computer (Super Computer)

Based on the generation

1. First Generation Computers (1946-1959)
2. Second Generation Computers (1959-1964)
3. Third Generation Computers (1964-1970)
4. Fourth Generation Computers (1979-present)
5. Fifth Generation Computer

DAMAGE TO AC SPLITE

Damages that occur in ac splitte is leakage from the freon gas, this can be characterized by the presence of snow on the top of the evaporator and the pipe installation is sized 1 / 4 which connects the outdoor unit gets.

besides there's more freon leak damages the other.

why ac splitte not want cold?

1. check on the remote control, what position mode operation is well positioned cool? if not in the position of cool, move to the cool position.

2. pd check the remote control, what is the position of the temperature setting is too high? if too high, lower the temperature of which the smallest.

3. check the outdoor unit, whether to the power supply of indoor unit? you can see, what unit outdoor fan motor rotates or not? if no spin is not yet to get electricity from the indoor unit.

4. check on the outdoor unit, what distinguished ac small pipe out of snow / ice? if issued a snow / ice means no leaks freon.cari ac unit leaks, repair and recharge freon again.

5. check on the outdoor unit, measuring the pressure with a manifold and measure freon compressor amperage.
normal amperage value of the compressor that you can see the specifications table beside the indoor unit or outdoor unit,

freon pressure is normal, if not a leak freon in ac unit, is 75 psi (if the compressor to operate) but if the compressor can not operate if the freon pressure is measured with the manifold is 150 psi, or more, (can not be measured)
.
if outdoor fan motor operates, but the compressor can not start means there is damage to the compressor as follows:

-Mechanical damage on the compressor, it can cause the compressor stalled / not to operate.
- Overload on the compressor is damaged.
- Running capacitor is damaged.
- The cables leading to the compressor off / on fire.
- Armature coils on the compressor motor is not bagus.ini can be marked with amperage reply so high / above normal limits.

6. ac splitte total dead?

the solution is:

you should check is the first time, the MCB which is in the electrical panel box.

MCB-check what is there specifically for power supply ac down? if there is a down immediately Rev again.

Imaginable-check the fuse in the plug and pcb ac components you, if broken replace with a new fuse.

-Check the power supply transformer is also located on the pcb components, are functioning properly.

when the MCB to ac power is increased, the fuse in the plug and fuse imaginable on pcb component has been replaced with the new fuse.
then ac split again operated, but not long after MCB down again means:

there is ac shorted on your splitte, usually a konsleting exist in the outdoor unit, the compressor had contact body.

or MCB that you use for your power supply is too small split ac ampernya value.

7. ac splitte when operated, the timer light on the indoor unit is blinking, this indicates that there thermistor on pcb component damaged.
the solution is:
replace with the new thermistor (thermistor placement is on the evaporator that black cord that plugs into component pcb)

The THERMISTOR REPLACEMENT OF THINGS THAT NEED TO BE THERE;
- Measure the two ends of the thermal foot by using a multi tester, standard size is usually 5k ohm till 15 k ohm (kilo ohms).
8. when ac splitte operated by remote control, ac did not want to start, but when when operated manually by pressing the button located on the indoor unit, ac splitte want to start.
the solution is:

check sensors located on the pcb component, may be exposed to water.
wipe dry the sensor in a way, also check the battery on the remote control may have been weak.
also check the remote control may be damaged because of a fall.

9. when ac splitte operated, the indoor fan motor spinning and then stopped did not operate at all.
there is damage to the indoor fan motor, replace the indoor fan motor with the new.

10. when ac splitte operated, 15 minutes later the water dripping from the bottom side of the indoor unit. (ac split in normal conditions / cold),
gutter / drain hose at the indoor unit is full of moss, wash ac with a steam engine.
on ac splitte using evaporator letter L, mean has two guttering that is above that are attached to the body and the only indoor units are under that you can disconnect it from the indoor unit.
when the bottom of the gutter which had been cleaned but the above are not cleaned water leak still persists.

11. when ac splitte operated, the compressor in the outdoor unit has overload / compressor does not work because the heat in excess of 150 degrees.
the solution is:

Check ampere-amperage compressor with pliers
Overload-check whether it was functioning properly.
Existing oil-check at the compressor, when less oil add to the compressor oil.
Replace the strainer and pipe-kapilernya who may have been blocked.
-Clean outdoor condenser unit when covered by dust / dirt.
-Open room divider plate compressor, for compressor heat can be removed by the outdoor unit fan motor.
12. when ac splitte operated and when the indoor unit outdoor unit gets power supply, ac compressor sounds tight and not split out the cold.
the solution is:
Running capacitor-check, if damaged replace with new.
-When running capacitor in good condition, meaning the compressor experienced a mechanical jam on compressornya and you must replace with the new compressor if the method below does not succeed play the mechanical compressor.
tips to overcome the stalled compressor
-Use a starting capacitor or larger value in running micro capacitor.
Through the rotation direction of the compressor by moving the power cable that is in the running capacitor capacitor keposisi running feet of adjoining and try in a few seconds, then return to its original position.
Freon-entries on the suction pipe pressure / suction when the compressor started to start.
-O'clock with a hammer on the mechanical compressor.
Raising the voltage to try to play a mechanical compressor.

munkin it can help. thanks