The Right Refrigerator Repair Services At The Right Time.
What
is refrigerator?
A refrigerator is
an instrument for keeping things cold. It is sometimes called a fridge or freezer. People put food and drinks in it, to keep those items cold or good for a longer time. A refrigerator has
a heat pump. The heat gets
added to the air outside. The heat pump is usually driven by an electric
motor.
In purely technical terms a
refrigerator is a common household appliance that consists of a thermally
insulated section and a heat pump that transfers heat from the inside of the
fridge to its external environment so that the inside of the fridge is cooled to a temperature below the ambient temperature of the room.
Cooling is a popular food storage technique in developed countries. Lower
temperatures in a confined volume lowers the reproduction rate of bacteria, so
the refrigerator reduces the rate of wastage.
A kitchen appliance that chills the temperature of foodstuffs
stored in it by the act of refrigeration,
a mechanical/chemical process of lowering the contained temperature of a
container.
The
Purpose of Refrigeration
The major reason for having a refrigerator is
to keep food cold. Cold temperatures help food stay fresh longer. The basic
idea behind refrigeration is to slow down the activity of bacteria so that it takes
longer for the bacteria to spoil the food.
Refrigeration
Problem
1. Compressor Starts but
Stops immediately
2. Compressor Start and
Stops Frequently
3. The compressor is Running
Continuously
4. Unusual Sound from
Compressor
5. High Compressor Discharge
Temperature
6.
Evaporator
Coil Icing
7. Reduced Cooling Capacity
8. Reducing oil level in the
compressor
Refrigeration
Problem & Solution
1. Compressor Starts but
Stops immediately
·
Low pressure cut out gets activated
Ensure that all the
suction line valves are in open condition, the refrigeration is properly
charged and the low pressure cut out is not defective. Look for help www.apmot.com
·
Defective oil pressure cut out
Check for the proper
functioning of oil pressure cutout and replace the defective cutout. Look for help www.apmot.com
·
Defrosting timer is getting activated frequently
If
the defrost timer is getting activated frequently, leading to a cutout of the
compressor, check and repair defrost timer. Look for help www.apmot.com
·
The lube oil level is below the required
level
This
can be because of leakage of lube oil from seal or carryover of oil. Rectify
the leakage and refill the oil level. Look for help www.apmot.com
·
Foaming of oil leading to the reduced oil
pressure
·
Motor overload cutouts are activating
2. Compressor Start and
Stops Frequently
·
Wrong Setting of Cutouts
·
Differential Setting Span is Small
Change the setting and increase the span between starting and stopping
compressor pressures. Look for help www.apmot.com
·
Defective Valves
·
Clogged Suction Filters
3. The compressor is Running
Continuously
·
Refrigerant not sufficient for cooling
evaporator
Ensure thermostatic expansion valve is working properly and clean the
filters inside TEV. Look for help www.apmot.com
·
Thermostat low-pressure cut-out not activated
at low temperature/ pressure
·
Refrigerant charge is low in the circuit
4. Unusual Sound from
Compressor
·
The capacity control setting is too high,
leading to knocking sound during starting
·
The oil pressure is low
Ensure that the oil level is maintained
and no foaming of oil is developed. Replenish or refill the lube oil if
required. Look for help www.apmot.com
·
Incorrect alignment of compressor and motor
·
Loose foundation
Ensure that the
compressor foundation is secured and all foundation bolts are checked for
tightness. Look for help www.apmot.com
·
Loosening of the driving belt
Ensure
to check the elasticity of the belt and renew if the belt is slack. Look for help www.apmot.com
5. High Compressor Discharge
Temperature
·
Excessive suction temperature due to less
refrigerant in the circuit
Recharge the circuit to maintain refrigerant quantity in the circuit.
Ensure TEV is set properly and supplying enough to the evaporator, else degree
of superheating will result in an increase of suction and discharge
temperatures of the compressor. Look for help www.apmot.com
·
The leak in the discharge valve leads to the
generation of heat
·
Leak in the safety valve
·
Open bypass between suction and discharge
6.
Evaporator Coil Icing
·
Too low-temperature setting
·
The coil capacity is less
·
Defrost is not operational
7. Reduced Cooling Capacity
·
Inadequate refrigeration
·
Insufficient or damaged insulation in the room
·
Room or hold is over packed
·
Malfunctioning solenoid or TEV
Check the functioning of these valves and renew if not functioning
properly. Look for help www.apmot.com
·
Poor thermostat location that senses cold
temperatures
Place the sensor of the TEV in
proper location i.e. discharge of the evaporator. Look for help www.apmot.com
·
Room door is kept open
8. Reducing oil level in the
compressor
·
Nozzle or filter clogged
Ensure that the
nozzle in oil return line or filter in solenoid valve is cleaned and not
choked. Look for help www.apmot.com
·
Foaming of oil due to liquid in the suction
line
Foaming of oil may arise due to liquid refrigerant entering the
crankcase. Replenish oil and troubleshoot the cause of liquid in the suction of
the compressor. Look for help www.apmot.com
·
Drive side seal leaking
The compressor
is provided with oil seal at the drive side. Ensure it is not leaking and renew
it if required. Look for help www.apmot.com
·
Worn out piston rings/ liner leading to oil
carryover in the system
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