Trouble shooting 7
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
OK
OK
OK
OK
4.8
15
6.0
7.6
9.6
16.1
21.0
27.8
Resistance value (k )
10
0
-5
-10
95.6
-30
50.3
-20
Temperature (
°C )
20
25
Outdoor Heat Exchanger Temperature
Thermistor Error
Outdoor unit Main PCB
Heat exchanger temperature thermistor
When Heat exchanger temperature thermistor open or
short-circuit is detected at power ON or while running the compressor.
1. Connector connection failure 2. Thermistor failure 3. Inverter PCB failure
Check Point 1 : Check connection of connector
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.
Check Point 2 : Remove connector and check thermistor resistance value
Thermistor characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
02-09
Refer to error code table.
12.4
5
Resistance value (k )
Temperature (
°C )
3.8
30
3.1
35
2.5
40
2.1
45
1.7
50
1.2
60
0.8
70
0.6
80
Check Point 3 : Check voltage of Inverter 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.
CN71
CN70
THERMISTOR
( DISCHARGE PIPE )
THERMISTOR
( HEAT EXCHANGER )
THERMISTOR
( OUTDOOR TEMP. )
1
4
2
3
1
4
2
3
1
2
3
1
2
3
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
