1. Connector connection failure 2.Thermistor failure
3. Main PCB failure
Test 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.
Test 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.
OK
OK
Test 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.
CN61
CN62
1
2
1
2
3 3
1
2
1
2
3 3
BLACK
BLACK
CN63
1
2
1
2
3 3
4 4
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
THERMISTOR
( HEX OUT TEMP. )
THERMISTOR
( DISCHARGE TEMP. )
THERMISTOR
( COMP TEMP. )
THERMISTOR
( OUTDOOR TEMP. )
6.27
8.70
12.30
26.34
40.01
62.55
100.91
168.60
Resistance Value
(k )
80
70
60
40
17.79
50
30
20
10
0
292.91
531.56
1013.11
-10
-20
-30
Temperature (°C)
3.43
4.60
Resistance Value
(k )
2.60
100
110
2.00
120
90
Temperature (°C)
Trouble shooting 25
OUTDOOR UNIT Error Method:
Discharge Thermister Error
Outdoor unit main PCB circuit
Discharge pipe temperature thermistor
When Discharge pipe temperarture thermistor open or short-circuit is detected
at power ON or while running the compressor.
Detective Actuators:
Detective details:
Indicate of Display:
Forecast of Cause:
02-40
Indoor Unit
Outdoor Unit
Operation lamp : 7 time Flash
ERROR CODE : [E : 71]
Timer lamp
: 1 time Flash
Monitor
A
B
C
D
E
F
7
: Light ON
: Light OFF
n : n time blinking
1
