Samsung 4qt12whwe Service Manual page 20

5-3-6 Room temperature sensor failure
Description
Indoor unit room temperature sensor error(open or short)
Detach the assembly sensor from the
ASS'Y PCB CN43 connector and measure
the sensor resistance with an ohmmeter (tester).
Is the sensor resistance value
10KΩ ±3% at the room temperature
Connect the sensor to CN43,
supply power, and measure the voltage of
#1 and #2 of the CN43 connector.
MICOM Error or Connector(CN43) check
Samsung Electronics
of 25˚C?
Yes
Below 0.5V?
No
Over 4.9V?
No
LAMP
OPERATION TIMER
ASS'Y Sensor Replace
SENSOR Resistance Value : 20˚C-12.09kΩ
No
SENSOR Resistance Value :
SENSOR Resistance Value :
SENSOR Resistance Value :
Yes
Poor ASS'Y PCB Replace
Yes
Poor ASS'Y PCB Replace
Troubleshooting
TURBO
: Lamp off : Lamp flickering
30˚C-8.31kΩ
35˚C-6.94kΩ
40˚C-5.83kΩ
19