Trouble shooting 13
OUTDOOR UNIT Error Method:
Heat Ex.(Pipe) Thermistor Error
Detective Actuators:
Outdoor unit Main PCB
Heat exchanger thermistor
Forecast of Cause :
1. Connector connection 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 miss-wiring, reset the power.
OK
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature (°F)
Resistance Value (k )
Temperature (°F)
Resistance Value (k )
If Thermistor is either open or shorted, replace it and reset the power.
OK
OK
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)
THERMISTOR
(PIPE)
BLACK
BLACK
BLACK
BLACK
THERMISTOR
(DISCHARGE)
THERMISTOR
(OUTDOOR)
BLACK
BLACK
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit
ERROR CODE : [E : 73]
Detective details:
When Heat exchanger temperature thermistor open or
short-circuit is detected at power ON or while running the compressor.
2.Thermistor failure
14°F
23°F
32°F
27.8
21.0
16.1
12.4
140°F
158°F
176°F
1
2 .
0
8 .
0
6 .
1
1
2
2
CN61
3
3
4
4
1
1
CN62
2
2
3
3
: Operation lamp: 7 time Flash, Timer lamp: 3 time Flash
Economy lamp: Continuous flash.
3. Main PCB failure
41°F
50°F
68°F
86°F
9
6 .
6
0 .
02-16
104°F
122°F
3.8
2
5 .
1
7 .