Haier BC-117A Series Service Manual page 13

2The refrigerator is not sufficiently cold.
Check point
-- Does the compressor operate?
-- Is the refrigerator installed a sufficient distance from any direct
heat source?
-- Is the condition of the condensors radiation satisfactory?
-- Are there any hot foodstuffs in the refrigerator?
-- Are there excessive storage foods in the refrigerator,causing
interference with the circulation of cold air.
--Is the temperature control knob in a suitable position?
--Is the sealing of the gasket in good condition?
YES
Does evaporator
get cold,when thermostat
is by-passed in the circuit?
Check point
-- The evaporator is partially cooled,and then gets
warm again.
-- The condensor also gets warm,and then gets
cold as the evoporator gets warm.
-- This cycle is repeated.
-- The condensor is cold.
-- The evaporator does not get cold.
-- The temperature of compressor is high.
-- There is almost no difference in temperature
between the suction and discharge pipes.
-- The condensor temperature is almost the same
as the environment temperature.
-- Evaporatol does not get cold.
-- There is frost on the suction pipe.
-- The condensor is at high temperature.
-- The cooling state of the evaporator is not effective.
-- The condensor is cold.
-- The refrigerator is not cold at all.
-- The temperature of the compressor dome is high.
Maintenance Service and Trouble Shooting
YES
Thermostat in faulty
condition
Cause of trouble
YES
Clogged moisture
Moisture in the cycle is frozen
at the inlet of the capillary
tube and evaporates after
circulating.
The cycle is clogged.It is
YES
clogged by welding.It is
clogged by foreign material in
the cycle.
YES
Faulty compressor.
YES
Over-charged refrigerant.
Refrigerant leaks.
Small amount of refrigerant
YES
leakage causes partial
freezing of the evaportaor
with frost forming in only
about half the area.
12
Indication
YES
YES
Cause of trouble
Replace the thermostat
Instruction(diagnosis)
Melt the frozen inner moisture
by applying heat to the
evaporator and capillaty tube
with soldering iron.
Temperature characteristics of
clogged moisture.
Repair as required after
checking the clogged area.
Repair as required after
checking the clogged area.
Recharge the refrigerant.
Recharge the refrigerant after
welding the area where
refrigerant leaked.