Trouble shooting 20
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OKOK
OKOK
Outdoor thermistor error
Outdoor unit Main PCB
Outdoor temperature thermistor
When the outdoor temperature thermistor open or short-circuit is
detected at power ON or while running the compressor.
1. Connector connection failure 2.Thermistor failure 3. Main PCB failure
Check Point 1 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if thermistor cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Main PCB.
02-23
THERMISTOR
(DISCHARGE)
THERMISTOR
(PIPE)
THERMISTOR
(OUTDOOR)
THERMISTOR
(HEAT SINK)
BROWN
BLACK
BLACK
BLUE
CN25 CN26 CN23 CN22 CN21
1 21 21 21 2
Refer to error code table.
THERMISTOR
(COMPRESSOR)
BROWN
1 2
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
50
Resistance Value (k )
403020100-30 -20 -10Temperature(°C)
Resistance Value (k )
70 8060Temperature(°C)
224.3 115.2 62.3 35.2 20.7 12.6 8.0 5.2
3.5 2.4 1.6 1.2
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