In life, people are also sick at times. The air-conditioner, too, sometimes encounters incidents, whether small or large, it still gives us a sense of discomfort and unsatisfactoriness with this facility.
Therefore, in this article we
provide readers with the most basic knowledge to identify the causes and
phenomena when the air conditioner is malfunctioning and the basic ways of
etching to the customer can From there specific measures to implement to
overcome some or most problems.
1. The machine is out of gas,
running out of gas
The HVAC system is a closed
system and the internal refrigerant gas is a very durable chemical that is not
decomposed under the operating conditions of the machine so there is no gas
loss. The machine only gas shortage, out of gas in case of leakage,
leakage on the pipe, at the valve, the pipe connection with sprinkler-co ... or
in the installation process the installer does not check and fully loaded gas.
When the machine is running
out of gas or running out of gas, there are some things to look for:
1. If the gas is not cold gas
machine. If the gas is not cold enough.
2. The phenomenon of snow
sticking directly to the small valve of the outdoor unit.
3. The operating current is
lower than the rated current on the machine.
4. The compressed gas
pressure on the compressor is lower than the normal working pressure (normally
65-75 psi). The pressure side pressure is also lower than normal.
5. In some air conditioners,
when the gas is shorted, the control board automatically switches off after
about 5-10 minutes and the fault on the indoor unit.
2. The compressor is not
running
Block is considered the heart
of the HVAC system, when the compressor is not running, the air conditioner is
not cold. Some causes the compressor not to run:
1. Loss of power supply to
the compressor: due to hole caused by the control board, contactor does not
close, open circuit.
2. Thermic protection
compressor: Usually due to damage, the fan is low or damaged, the motor does
not rotate.
3. Burning one of the internal
motor windings, this case can lead to source CB jumper.
3. Noise compressor:
When your air conditioner is
affected by this phenomenon, you often hear the noise coming from the heat
sink, ie from the hot side often placed outdoors.
a. Causes:
1. Excess gas.
1. Excess gas.
2. The inside of the
compressor is damaged.
3. Have screws or screws
loose
4. Never remove shipping
plates
5. There is contact of one
tube to another tube or case
b. PP repair:
1. Remove the charged gas by
discharging the gas to the environment with a hexagonal lock. Discharge
location at the tip of the cone at the end of the hot rig - hot.
2. Replace the compressor by
buying the right compressor, brand, capacity and replacement or by using an
alternate.
3. Tighten the bolts or vis,
check that the compressor is in the same condition as the original or not.
4. Remove the transport
plates to allow the machine to collide and cause a crash.
5. Straighten or fix the tube
so that it does not come in contact with the tube or other metal parts. Check
if the compressor stand is oblique, bent or curved, causing the compressor to
be oblique and to collide with the wall of the heated heater - causing the
heater to melt. Make sure the bulbs are below the bottom of the compressor.
loose or not. If it is tight, then tight. Do not tighten the buloong
it.
2. Too cold:
a. Reason:
1. The thermostat is
defective.
2. Adjust the temperature
down too low compared to the needs.
b. PP repair:
1. Check the temperature
controller and wiring.
2. Replace the temperature
accordingly.
3. The machine runs
continuously but not cold enough.
a. Reason:
1. Lack of gas.
2. Liquid gas pipes
obstructed or blocked.
3. The wind filter is dirty.
4. The cooler is dirty.
5. Not enough air through the
indoor unit.
6. The condenser is dirty or
partially clogged.
7. There is no air or gas in
the air conditioner.
8. Non-recirculating air.
9. The compressor does not
work.
10. Overload.
11.
b. PP repair:
1. Gas testing, gas
measurement, gas charging, P ht test, discharge ...
2. Replacement of obstructive
details
3. Clean or replace
4. Clean
5. Check the fan
6. Maintain the outdoor unit
7. Vacuum extraction and new
gas charging
8. Remove obstructing air currents
9. Check the compressor
performance
10. Load Testing
4. Low suction rate.
a. Reason:
1. Lack of gas
2. Liquid gas pipes
obstructed or blocked
3. The wind filter is dirty
4. The cooler is dirty
5. Not enough air through the
indoor unit
6. Throttle is throttled
7. Throttle or capillary is
completely blocked
8. The throttle sensing valve
of the throttle
b. PP repair:
1. Try it
2. Replacement of obstructive
details
3. Clean or replace
4. Clean
5. Check the fan
6. Change the valve
7. Change the valve or capillary
8. Change the valve
High suction pressure.
a. Reason:
1. Exhaust gas
2. The compressor does not
work
3. The sensor mounting
location is incorrect
4. Too heavy load
b. PP repair:
1. Remove the charged gas
2. Check the compressor
performance
3. Change the sensor mounting
position
4. Check the load
6. Low compression pressure.
a. Reason:
1. Lack of gas
2. The compressor does not
work
b. PP repair:
1. Try it
2. Check the compressor
performance
7. High compression pressure.
a. Reason:
1. Exhaust gas
2. The condenser is dirty or
partially clogged
3. There is no air or gas in
the air conditioner
4. Non-recirculating air
5. The temperature of the air
or water is high
6. Lack of air or cooling
water
b. PP repair:
1. Remove the charged gas
2. Maintain the outdoor unit
3. Vacuum extraction and new
gas charging
4. Remove obstructing air
currents
5. Saw the compressor to
check, repair, replace.
6. Check and increase the
cooling process.
8. The compressor runs and
stops continuously due to overload.
a. Reason:
1. The coil cord contactor
compressor is damaged
2. Low voltage
3. Lack of gas
4. Exhaust gas
5. The condenser is dirty or
partially clogged
b. PP repair:
1. Check the coil and the
contacts
2. Check the voltage
3. Test
4. Remove the charged gas
5. Maintain the outdoor unit
9. Machine runs and stops
continuously.
a. Reason:
1. The coil cord contactor
compressor is damaged
2. Low voltage
3. Lack of gas
Liquid gas pipes are
obstructed or blocked
5. Exhaust gas
6. The condenser is dirty or partially
clogged
7. Throttle or capillary is
completely blocked
8. The throttle sensing valve
of the throttle
b. PP repair:
1. Check the coil and the
contacts
2. Check the voltage
3. Test
4. Replacement of obstructive
details
5. Remove the charged gas
6. Maintain the outdoor unit
7. Change the valve or
capillary
8. Change the valve
10. The fan does not run.
a. Reason:
1. Short circuit or break
wire
2. The thermostat is
defective
3. Capacitor is damaged or
short circuit
4. Fan cord contactor damaged
Fan motors are
short-circuited or impacted
b. PP repair:
1. Check the clock circuit
2. Check the temperature
controller and wiring
3. Check the capacitor by the
meter
4. Check the coil and
contacts
5. Check the insulation by
the meter
11. The cooler fan does not
run.
a. Reason:
1. Short circuit or break
wire
2. Capacitor is damaged or
short circuited
3. Coil cord contactor fan is
damaged
Fan motor is short circuit or
shell
b. PP repair:
1. Check the clock circuit
2. Check the capacitor by the
meter
Check the coil and the
contacts
4. Check the clock insulation
12. Condenser compressors and
fans are not running.
a. Reason:
1. Short circuit or break
wire
2. The thermostat is
defective
3. The coil cord contactor
compressor is damaged
b. PP repair:
1. Check the clock circuit
2. Check the temperature
controller and wiring
Check the coil and the
contacts
13. The compressor does not
run, the fan runs.
a. Reason:
1. Short circuit or break
wire
2. The thermostat is
defective
3. Capacitor is damaged or
short circuit
4. The coil cord contactor
compressor is damaged
5. The compressor is
short-circuited or contacted
6. The compressor is jammed
b. PP repair:
1. Check the clock circuit
2. Check the temperature
controller and wiring
3. Check the capacitor by the
meter
4. Check the coil and
contacts
5. Check the insulation by
the meter
6. Saw my nn out check,
repair, replace.
14. The machine is not
running.
a. Reason:
1. No electricity
2. Break the fuse or the
vasitor
3. Liquid electrical
connections
4. Short circuit or break
wire
5. Safety equipment open
6. The transformer is damaged
b. PP repair:
1. Check the voltage
2. Check the size and type of
fuses
3. Check the electrical
connection - tighten it
4. Check the clock circuit
5. Inspection of protective
equipment
6. Check the clock control
circuit
(Collect)
