Outdoor Temperature Sensor Error - Fujitsu ASU9RL Service Instruction

Trouble shooting 6
OUTDOOR UNIT Error Method:
INDOOR UNIT

Outdoor Temperature Sensor Error

Detective Actuators:
Outdoor Unit Main PCB Circuit
Outdoor Temperature Thermistor
Forecast of Cause :
1. Connector connection failure 2.Thermistor failure 3. Main PCB 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 mis-wiring, reset the power.
OK OK
Check Point 2 : Remove connector and check Thermistor resistance value Check Point 2 :
Thermistor Characteristics (Approx. value)
Temperature
Resistance Value (k )
Temperature
Resistance Value (k )
If Thermistor is either open or shorted, replace it and reset the power.
OK OK
Check Point 3 :
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)
3 2 1
3 2 1
CN62
If the voltage does not appear, replace Main PCB.
Indicate or Display:
Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF
Indoor Unit
ERROR CODE : [E : 0A]
Detective details:
When Outdoor Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
-4°F 14°F 23°F
(-20°C) (-10°C) (-5°C)
115 62.3 46.6
86°F 104°F 122°F
(30°C) (40°C) (50°C)
7.97 5.18 3.45
4 3 2 1
4 3 2 1
CN61
06-10
: Operation LED : 3 times, Timer LED : 4 times
32°F 41°F 50°F
(0°C) (5°C) (10°C)
35.2 26.9 20.7
140°F 158°F
(60°C) (70°C)
2.36 1.65
59°F 68°F
(15°C) (20°C)
16.1 12.6