Detective actuators:
Indoor unit controller PCB circuit
Indoor temperature thermistor
Detective details:
Indoor unit thermistor is open or short
is detected always.
Forecast of cause:
1. Connector failure connection
2. Thermistor failure
3. Controller PCB failure
Check Point 2 : Remove connector and check thermistor resistance value
Thermistor characteristics (Rough value)
If Thermistor is either open or shorted, replace it and reset the power.
Check Point 1 : Check connection of connector
Check if connector is loose or removed
Check erroneous connection
Check if thermistor cable is open
>> Reset power when reinstalling due to removed connector or incorrect wiring.
6.5 kΩ8.0 kΩ10.0 kΩ12.5 kΩ
15.8 kΩ20.2 k25.9 kΩ33.6 kΩ
4.35 kΩ5.3 kΩ
Resistance value
OK
OK
Troubleshooting 11
Room temperature sensor error
Temperature
Temperature
32°F (0°C)
104°F (40°C) 113°F (45°C)
41°F (5°C)
44.0 kΩ58.2 kΩ
14°F (-10°C) 23°F (-5°C) 50°F (10°C) 59°F (15°C)
68°F (20°C) 77°F (25°C)
86°F (30°C) 95°F (35°C)
Resistance value
Check Point 3 : Check voltage of controller PCB (DC5.0V)
Make sure circuit diagram of indoor unit and check terminal voltage at thermistor (DC5.0V)
If the voltage does not appear, replace controller PCB.
Room temp.
thermistor
BLACK
BLACK
1
3
CN5
Indicate or Display:
Indoor unit
Operation lamp: 4 times Flash,
Timer lamp : 1 time Flash
Wired remote control
Error code : [E : 41]
n
: n times blinking
: Light ON: Light OFF
Mode Error
2 5
15
Outdoor unit (AOUG36/48LMAS1)
03-16
2
1 1
22
BLACK
BLACK
A
B F
E
D
C
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