Trouble shooting 4
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
Check Point 2 : Remove connector and check thermistor resistance value
Check Point 1 : Check connection of connector
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
OK
OK
6.51
35
8.04
30
10.012.515.820.225.933.6Resistance value (k )
2520151050
Temperature (°C )
3.594.355.30Resistance value (k )
504540Temperature (°C )
Room Temperature Thermistor Error
Indoor Unit Controller PCB
Room Temperature Thermistor
When Room Temperature Thermistor open or short-circuit is
detected at power ON.
1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure
Check if connector is removed.
Check if connector is erroneous connection.
Check if thermistor cable is open.
>> Upon correcting the removed connector or mis-wiring, reset the power.
Thermistor characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Make sure circuit diagram of indoor unit and check terminal voltage at thermistor (DC5.0V)
If the voltage does not appear, replace Controller PCB.
02-06
Refer to error code table.
CN4
THERMISTOR
( ROOM TEMP. )
THERMISTOR
( PIPE TEMP. )
1
4
2
3
1
4
2
3
BLACK
BLACK
BLACK
BLACK
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