Trouble shooting 18
OUTDOOR UNIT Error Method:
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : LED 8 Times Blink
ERROR CODE : No indication
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OK
OK
OK
OK
THERMISTOR
(DISCHARGE)
THERMISTOR
(PIPE)
THERMISTOR
(OUTDOOR)
THERMISTOR
(COMPRESSOR)
THERMISTOR
(HEAT SINK)
BROWN
BLACK
BLACK
BLUE
BROWN
CN21 CN22 CN23 CN26
CN25
1 2
1 2
1 2
1 2
1 2
86
°F
(30
°C)
6.10
9.73
12.4
16.1
Resistance Value (k )
68
°F
(20
°C)
7.67
59
°F
(15
°C)
50
°F
(10
°C)
41
°F
(5
°C)
32
°F
(0
°C)
Temperature
1.79
1.25
0.89
Resistance Value (k )
122
°F
(50
°C)
140
°F
(60
°C)
158
°F
(70
°C)
0.65
176
°F
(80
°C)
0.48
194
°F
(90
°C)
0.36
212
°F
(100
°C)
0.27
230
°F
(110
°C)
0.21
248
°F
(120
°C)
2.62
3.95
104
°F
(40
°C)
Temperature
Heat Sink Temperature Sensor Error
Outdoor Unit Main PCB Circuit
Heat Sink Temperature Thermistor
When Heat Sink 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
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
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.
02-22
