Fujitsu AOU36RLX Service Instruction

Trouble shooting 18
OUTDOOR UNIT Error Method:
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : LED 8 Times Blink
ERROR CODE : No indication
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OKOK
OKOK
THERMISTOR (DISCHARGE)
THERMISTOR (PIPE) THERMISTOR (OUTDOOR) THERMISTOR (COMPRESSOR) THERMISTOR (HEAT SINK)
BROWN BLACK BLACK BLUE BROWN
CN21 CN22 CN23 CN26 CN25
1 2 1 2 1 2 1 2 1 2
86°F
(30°C)
6.109.7312.416.1Resistance Value (k )
68°F
(20°C)
7.67
59°F
(15°C)
50°F
(10°C)
41°F
(5°C)
32°F
(0°C)
Temperature
1.79
1.25 0.89Resistance Value (k )
122°F
(50°C)
140°F
(60°C)
158°F
(70°C)
0.65
176°F
(80°C)
0.48
194°F
(90°C)
0.36
212°F
(100°C)
0.27
230°F
(110°C)
0.21
248°F
(120°C)
2.623.95
104°F
(40°C)
Temperature
Heat Sink Temperature Sensor Error
Outdoor Unit Main PCB Circuit
Heat Sink Temperature Thermistor
When Heat Sink Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
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.
Check Point 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.
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)
If the voltage does not appear, replace Main PCB.
02-22

Fujitsu AOU36RLX Specifications

General

Brand	Fujitsu
Model	AOU36RLX
Category	Air Conditioner
Language	English