Inspection Flowchart And Repair Items - Sharp SJ-GF60X-T Service Manual

4.

INSPECTION FLOWCHART AND REPAIR ITEMS

• During check of the PWB circuits, use thorough caution not to get electric shock.
• To check resistance of electric parts, be sure to disconnect the power supply plug. (Turn OFF the power supply.)
Problem Self-diagnosis display
F-thermistor fault
Inverter wiring error
Inverter communication error
Refrigerator does not
Inverter overload protection
cool at all
(The compressor
does not work.)
Inverter rotation speed abnormal drop
Inverter startup fault
Inverter overcurrent
Inverter position detection fault
F-thermistor high-temperature
DEF thermistor fault
External air temperature thermistor fault
Cooling fan motor fault
Condenser fan motor fault
Defrosting fault
Cooling performance
is in suffi cient
(The compressor is
External air temperature information
working.)
Door open information
F-thermistor high temperature
No self-diagnosis fault
Freezer compartment
F-thermistor fault
is too much cooled.
Check/inspection point
1) Connector insertion check (Main PWB, intermediate
connector)
2) Thermistor resistance check (Check the value in the
thermistor characteristic table.)
3) If the above check results are normal:
1) Inverter PWB – compressor wiring check (Connector
insertion/wire break check)
2) If the above check results are normal:
1) Inverter PWB – main PWB wiring check, Protector check
(Connector insertion/wire break check)
2) If the above check results are normal:
1) Is there any problem about the refrigerator heat radiation
space?
2) Compressor wound wire resistance check (Refer to page 13)
3) Refrigerant valve operation check
4) If the above check results are normal:
1) Compressor wound wire resistance check (Refer to page 13)
2) Refrigerant valve operation check
3) If the above check results are normal:
1) Connector insertion check (Main PWB, intermediate
connector)
2) Thermistor resistance check (Check the value in the
thermistor characteristic table.)
3) Compressor/freezing cycle check
4) If the above check results are normal:
1) Connector insertion check (Main PWB, intermediate
connector)
2) Thermistor resistance check (Check the value in the
thermistor characteristic table.)
3) If the above check results are normal:
1) Connector insertion check (Main PWB, intermediate
connector)
2) Fan motor installation/condition/operation check
3) If the above check results are normal:
1) Connector insertion check (Main PWB, intermediate
connector)
2) Defrosting heater resistance check (Check the value in the
functional part specifi cations.)
3) If the above check results are normal:
1) Refrigerator installation/operating condition check
(Installation environmental temperature, Door opening/closing
frequency)
1) F-thermistor connector insertion check (Main PWB,
intermediate connector)
2) F-thermistor resistance check (Check the value in the
thermistor characteristic table.)
3) Cooling fan motor operation check (Rotation speed is low.)
4) Condenser fan motor operation check (Rotation speed is
low.)
5) Compressor and freezing cycle check
6) Door packing inspection and installation/operating conditions
(Installation environmental temperature, door opening/closing
frequency, too much stuffed food, etc.)
7) If the above check results are normal:
1) Connector insertion check (Main PWB, intermediate
connector)
2) Thermistor resistance check (Check the value in the
thermistor characteristic table.)
3) If the above check results are normal:
23
Action on error detection
1) Correct the installation.
2) Replace the thermistor.
3) Replace the main PWB.
1) Correct the installation, or replace the wiring.
2) Replace the inverter PWB or main PWB.
1) Correct the installation, or replace the wiring/protector.
2) Replace the inverter PWB or main PWB.
1) Improve the refrigerator installation condition.
2) Replace the compressor.
3) Replace the refrigerant valve or main PWB.
4) Replace the inverter PWB or main PWB.
1) Replace the compressor.
2) Replace the refrigerant valve or main PWB.
3) Replace the inverter PWB or main PWB.
1) Correct the installation.
2) Replace the thermistor.
3) Replace the compressor/freezing cycle.
4) Replace the inverter PWB or main PWB.
1) Correct the installation.
2) Replace the thermistor.
3) Replace the main PWB.
1) Correct the installation.
2) Correct the installation, or replace the fan motor.
3) Replace the main PWB.
1) Correct the installation.
2) Replace the defrosting heater or temperature fuse.
3) Replace the main PWB.
1) Improve the installation/operating condition.
1) Correct the installation.
2) Replace the thermistor.
3) Replace the cooling fan motor.
4) Replace the condenser fan motor.
5) Replace the compressor/freezing cycle.
6) Improve the packing mounting/installation/operating
condition.
7) Replace the inverter PWB or main PWB.
1) Correct the installation.
2) Replace the thermistor.
3) Replace the main PWB.
SJGF60XT