Samsung RF28R7201 AA Series Service Manual page 59

※ R Self-diagnostics check list
LED
F R
Communication
Dispenser Panel
Communication
Fridge Ice Duct
Fridge Ice Room
abnormal high-
indicator blinks
abnormal high-
indicator blinks
abnormal high-
indicator blinks
Item Diagnostic method
IO Expander
It is desirable to replace Main PBA.
Error
Actually, If there is not a problem,
Main ↔
it is desirable to replace Main and
Dispenser Panel PCB With the
oscilloscope after a cable problem
Error
confirming.
After separating MAIN PCB CN20
wire from PCB, resistance value
between CN20-"21" ↔ "23" shall be
63(230) ohm ± 7%. (Resistance value
Heater Error
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-"19" ↔ "23" shall be
135 ohm ± 7%. (Resistance value is
Heater Error
varied by input power)
0 ohm : heater short, ∞ ohm : wire/
bimetal open (Must power off)
The Freezer
compartment
temperature
Check if the door has been open for
The Fridge
a long time or if hot food has been
compartment
stored in the compartment. If the
reason for the error is removed, the
temperature
error code disappears after a pre-
determined period of time.
The Flex-Zone
compartment
temperature
㊻


59
TROUBLESHOOTING
Location image