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
Trouble shooting 24
OUTDOOR UNIT Error Method:
2-Way Valve Thermistor Error
Outdoor unit main PCB circuit
2 Way valve temperature thermistor
When 2 Way valve 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:
02-29
6.27
176
8.70
158
12.30
26.3440.0162.55100.91168.60
Resistance Value
(k )
140
1048668
50
807060
40
17.79
122
503020
10
32
0
292.91531.561013.11
14
-4
-10
-20
-22
-30
Temperature (°F)
Temperature (°C)
Resistance Value
(k )
Temperature (°F)
Temperature (°C)
Test 3 : Check voltage of Main PCB (DC5.0V)
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
For AOU36RLXFZH For AOU45RLXFZ
If the voltage does not appear, replace Main PCB.
CN64
CN65
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
VALVE THERMISTOR A, B
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
VALVE THERMISTOR C, D
2-WAY VALVE C
3-WAY VALVE C
2-WAY VALVE D
3-WAY VALVE D
11
22
33
44
55
66
77
88
11
22
33
44
55
66
77
88
99
CN64
CN65
CN66
BLACK
BLACK
VALVE THERMISTOR A, B
VALVE THERMISTOR C, D
VALVE THERMISTOR E
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
2-WAY VALVE C
3-WAY VALVE C
2-WAY VALVE D
3-WAY VALVE D
2-WAY VALVE E
3-WAY VALVE E
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
Indoor Unit
Outdoor Unit
Operation lamp : 7 time Flash
ERROR CODE : [E : 76]
Timer lamp: 6 time Flash
Monitor
ABCDEF
7
: Light ON : Light OFF n : n time blinking
6
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