Sr. No.

Cause

Check and remedy

1.

No electric power supply

Test with test lamp for the availability of power. If not, write the complaint.

2.

Discontinuity in circuit

Check for continuity and do the necessary repair

3.

Fuse blown

Check for fuse blown. if it exists, replace the fuse.

4.

Overload protector burnt out

 overload protector, if blown, replace the overload protector.

5.

Too low voltage

Measure for low voltage. If it is there, close the unit and write the complaint with the supply complaint office.

6.

Thermostatic is in off position

See for the thermostat for proper setting. If not, set it the right setting.

7.

Relay defective

Heck for relay. Start the unit without relay. If starts, replace the relay.

8.

Stuck compressor

 Start the unit without relay. If it does not start,  open the hermetically sealed unit. Do the necessary repair or replacement

9.

Burnt motor

Check for continuity in motor winding. If it exists n get the necessary repair or replacement.

Sr. No.

Cause

Testing and remedy

1.

No refrigerant in the cooling unit

Run the unit. Touch condenser for hotness and evaporator for coldness. If it exists, check the unit for leakage. Repair for leakage if found. Then only  charge the refrigerant into the unit.

2.

Filter in Drier cum filter has choked

Pinch off the tube at entrance and exit of the filter. Take out filter and replace it by a new filter.

Sr. No.

Cause

Check and remedy

1.

Improper Thermostat setting

Check for setting and do the necessary correct adjustment.

2.

Shortage of refrigerant in the unit

Run the unit. Check for frost on evaporator because of low pressure. Also check for condenser hotness. If it is less hot, then charge more refrigerant into the unit after insuring no leakage.

3.

Excess of refrigerant in the unit

See for sweating on suction pipe and condenser for excessively hotness. If it exists, then purge some refrigerant to achieve required conditions. a

4.

Insufficient  condensation

There is dust on condenser tubes. Check for fan speed. Proper cooling is not there. Clean the condenser tubes and do the necessary repair of the blower if necessary.

5.

Compressor working inefficiently

Observe for frosting on the evaporator tubes. Cold condenser and warm suction tells about the inefficient working of the compressor. Open the unit and do the necessary repair of the compressor.

6.

Tripping via overload protector

Test the overload protector for its loose connections. Reduce cooling load on the machine or check by replacing the overload protector.

7.

Wrong setting of thermostat

Observe if the machine is stopping before reaching the required temperature or machine is not stopping at all. Check the thermostat and do the right setting of the thermostat.

8.

Poor insulation on walls, roofs and bottom.

Heat enters constantly through the entire structure. it appears that the machine does not produce desired cooling. Fill the required insulation where it is less.

9.

Door not properly closed

Check the tightness of the door closing. if not tight, check for obstruction not allowing the door to close tightly. Do the necessary repair or replacement.

10.

Inside light is always on

Test the door switch. Check its operation by opening and closing the door time and again. If defective, do the necessary replacement.

Sr. No.

Possible cause

Check and remedy

1.

Improper refrigeration

Check for shortage/excess of refrigerant. Poor condensation & choking in the refrigeration cycle. Inefficient compressor & door not closed tightly. Do the necessary repair or replacement.

2.

Adjustment of thermostat at very low temperature

Note the thermostat setting and do the necessary adjustment or repair it or replace it.

Sr. No.

Possible cause

Check and remedy

1.

Poor circulation of air inside

 Check for overcrowding of refrigerator shelves. If overcrowding exists, remove or adjust products   to permit better circulation of air.

2.

Inside light is always on

Observe door switch and its operation with the door. Repair it or replace it.

3.

Excessive frosting on the cooling coil

There is no freezing on evaporator coil. If it is there, switch off the machine to melt ice from the evaporator coil.

4.

Leakage of air in the door

 Check for proper door lining. Repair or replace it to make sure that there is no leakage of cooling from the door.

5.

Poor insulation of the cooling unit

Fill the unit with proper insulation.

Sr. No.

Possible cause

Check and remedy

1.

Dust on condenser

Check for dust on condenser. Clean the condenser with water. Use a soft cloth to wipe the dust.

2.

Frequent voltage fluctuations

Are there  voltage fluctuations? Adjust it if possible otherwise close the unit for sometime till voltage is fluctuating.

3.

Defective relay

 If the relay is defective, then repair it if possible or replace it.

4.

Choking in the system

Improper cooling and cold condenser is the indication for choking. If the observation is yes, then replace the filter cum drier.

5.

Overcharging of refrigerant

Water on suction line is an indication of overcharging. Purge some refrigerant from the system.

6.

Motor winding are week

Check motor winding. If burnt, get the rewinding done.

Sr. No.

Possible cause

Check and remedy

1.

Always Light is  on

Check door switch operation. If found defective, repair it or replace it.

2.

Light is always on

 Check the door switch.  Repair it or replace it.

Sr. No.

Possible cause

Check and remedy

1.

Improper leveling of the cooling unit

Check the leveling of the unit. If found, adjust the base screws to level it.

2.

Food stuff loosely placed inside

Check for food stuff. If found loosely placed, place it properly

3.

Noise inside the condensing unit

Compressor motor assembly not properly mounted on springs. Check if found noise inside, cut welding of the sealed unit and do the necessary repair or replacement.

4.

Loose condenser coil

Check for loose condenser coil. If found, do the necessary repair or replacement.