Samsung RF28R7201 AA Series Service Manual page 58

TROUBLESHOOTING
※ R Self-diagnostics check list
LED
F R
Defrosting Error
Defrosting Error
Damper Heater
Ice Maker (Fridge)
Communication
Main ↔ Inverter
Communication
Item Diagnostic method
After separating MAIN PCB CN20
wire from PCB, resistance value
between CN20-"6" ↔ CN20-"8" shall
Freezer
be 63(230) ohm ± 7%.(Resistance
value is varied by input power)
0 ohm : heater short, ∞ ohm : wire/
bimetal open (Must power off)
After separating MAIN PCB CN20
wire from PCB, resistance value
between CN20-"6" ↔ "8" shall be 120
Fridge
ohm ± 7%. (Resistance value is varied
by input power)
0 ohm : heater short, ∞ ohm : wire/
bimetal open (Must power off)
After separating MAIN PCB CN40
wire from PCB, resistance value
Flex ROOM between CN40-"25" ↔ "27" shall be
135 ohm ± 7%. (Resistance value is
Error varied by input power)
0 ohm : heater short, ∞ ohm : wire/
bimetal open (Must power off)
After changing the Ice Maker(R), plug
the refrigerator power code again,
Function Error
and check the operation.
Ice Room Fam The voltage of MAIN PCB CN20-"22"
↔ "24: shall be between 7V~12V
Error
Actually, If there is not a problem, it is
Main ↔ Panel
desirable to replace Main and Panel
PCB With the oscilloscope after a
Error
cable problem confirming.
Actually, If there is not a problem,
it is desirable to replace Main and
Inverter PCB With the oscilloscope
Error
after a cable problem confirming.
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