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Trouble shooting 16
OUTDOOR UNIT Error Method:
Discharge Thermistor Error
Detective Actuators:
Outdoor unit Main PCB
Discharge pipe temperature thermistor
Forecast of Cause :
1. Connector connection 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.
OK
OK
Check Point 2 : Remove connector and check thermistor resistance value
Thermistor characteristics (Approx. value)
Temperature
(°C )
Resistance value (k )
Temperature
(°C )
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)
BLACK
1
1
BLACK
2
2
P1
BLACK
3
3
Thermistor (DISCHARGE PIPE )
BLACK
4
4
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Indoor Unit :
Operation indicator: 7 time Flash
Timer indicator
Economy indicator: Continuous Flash
Error code : [ E : 71 ]
Detective details:
When Discharge pipe temperature thermistor open or short-circuit
is detected at power ON or while running the compressor.
2. Thermistor failure
-30
-20
-10
1013.1
531.6
292.9
221.1
30
40
50
40.0
26.3
17.8
12.3
02-20
: 1 time Flash
3. Main PCB failure
-5
0
5
10
168.6
129.8
100.9
60
70
80
90
8.7
6.3
4.6
15
20
79.1
62.6
100
120
3.4
2.0
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Table of Contents
Troubleshooting
