Refrigerating Cycle - EdgeStar BBR900BL Service Manual

4. TROUBLESHOOTING

4-4 REFRIGERATING CYCLE

▼ Troubleshooting Chart
CAUSE STATE OF UNIT
Appliance does
PAR TIAL
not get cold
LEAKAGE
enough
Appliance does
WHOLE
LEAKAGE not get cold at all
Appliance does
PARTIAL
not get cold
RESTRICTION
enough
Appliance does
WHOLE
not get cold
RESTRICTION
Observe refrigerant disharging point. Oil dishcharge/stain is often best indicator. indicator. Use bubbles to locate hole in line,
evaporator or condensor.
Does compressor
turn on?
NO
STATE OF EVAPORATOR
Low owing sound of
Refrigerant is heard and
frost forms
Flowing sound of Refrigerant
is not heard and frost isn't
formed.
Flowing sound of Refrigerant
is heard and frost forms
Flowing sound of Refrigerant
is not heard and frost isn't
formed.
Does frost form on
YES
the evaporator?
Normal amount
Faulty
Compressor.
Check Compressor
TEMPERATURE
OF COMPRESSOR
A little high -
more than
ambient room
temperature.
A little high -
more than
ambient room
temperature.
A little high -
more than
ambient room
temperature.
A little high -
more than
ambient room
temperature.
No frost or forms
in inlet only
Inject Refrigerant to
Compressor and check
cooling operation.
No cooling
Clogged or restricted
Normal formed
frost in Evaporator
- 36 -
COMMENTS
• A little refrigerant discharges
• Normal cooling is possible when
charging refrigerant of regular amount
stated on specification plate / rating
label.
• A little refrigerant discharges
• Normal cooling is possible when
charging refrigerant of regular amount
stated on specification plate / rating
label.
• No discharging of refrigerant
• The capillary tube is faulty.
• The filter dryer is faulty.
• The condensor is faulty.
• The evaporator is faulty.
• No discharging of refrigerant
Is oil leak detected?
YES
Observe the discharging
amount of Refrigerant.
No or not much
Is gas leak detected?
Find and Repair Leak
NO