Samsung RF28R7201 AA Series Service Manual page 60

TROUBLESHOOTING
※ R Self-diagnostics check list
LED
F R
AUTO FILL Infuser
Overflow Error
Comp location
detection error
constraint error
Comp low voltage
Comp over voltage
Item Diagnostic method
Check voltage of MAIN PCB
CN90-"11" ↔ "13"
- 0V ~ 4.5V : Water overflow
- 4.5V ~ 5V : No problem
Check if there is a short between
Comp start
compressor terminals.
failure error
Check IPM Voltage [Under 13.5V]
Check if there is a short between IPM
Pins [#1~33]
Check the soldering status of the
Comp IPM
inverter PCB. (Check if any parts have
Fault Error
short-circuited).
Check the Compressor and the Cycle.
Check the Compressor connections .
Check the voltage of Resistance of R2
[0.09Ohm]
Check the soldering status of the
MAIN PCB. (Check if any parts have
short-circuited)
Check the Compressor and the Cycle.
Compressor locking Error.
Comp motor Check the Compressor and the Cycle.
Check the compressor wire
connections.
Check the input voltage.
- AC 60V (Input Power AC110~127V)
- AC 106V (Input Power AC 220~240V)
error
Check PCB bottom side soldering
state.
Check the input voltage.
- AC 155V (Input Power AC110~127V)
- AC 310V (Input Power AC 220~240V)
error
Check PCB bottom side soldering
state.
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