Outdoor Discharge Pipe Temperature Sensor Error - Fujitsu ASU9RL Service Instruction

Trouble shooting 7
OUTDOOR UNIT Error Method:
INDOOR UNIT
Outdoor Discharge Pipe Temperature
Sensor Error
Detective Actuators:
Outdoor Unit Main PCB Circuit
Discharge Pipe 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 : 0C]
Detective details:
When Discharge Pipe Temperature Thermistor open or short-circuit
is detected at power ON or while running the compressor.
32°F 41°F 50°F 59°F
(0°C) (5°C) (10°C) (15°C)
169 130 101 79.1
158°F 176°F 194°F 212°F
(70°C) (80°C) (90°C) (100°C)
8.70 6.27 4.60 3.43
4 3 2 1
4 3 2 1
CN61
06-11
: Operation LED : 3 times, Timer LED : 2 times
68°F 86°F 104°F 122°F
(20°C) (30°C) (40°C) (50°C)
62.6 40.0 26.3 17.8
248°F 284°F
(120°C) (140°C)
2.00 1.22
140°F
(60°C)
12.3