Fujitsu AOU18RLX Service Instruction

Trouble shooting 11
OUTDOOR UNIT Error Method:
Indicate or Display:
Outdoor Unit : LED 7 times blink
ERROR CODE : E : 15
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
18.126.9
68°F
(20°C)
41.164.581.8105135176Resistance Value (k )
59°F
(15°C)
50°F
(10°C)
41°F
(5°C)
32°F
(0°C)
Temperature
OKOK
OKOK
12.5
86°F
(30°C)
122°F
(50°C)
104°F
(40°C)
140°F
(60°C)
0.51
356°F
(180°C)
0.77
320°F
(160°C)
1.211.983.434.616.318.78Resistance Value (k )
284°F
(140°C)
248°F
(120°C)
212°F
(100°C)
194°F
(90°C)
176°F
(80°C)
158°F
(70°C)
Temperature
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
Compressor Temperature Sensor Error
Outdoor Unit Main PCB Circuit
Compressor Temperature Thermistor
When Compressor 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 (Rough 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.
02-15
Indoor Unit : Operation LED: Blink, Timer LED: 8 times blink,
Vertical swing LED: OFF

Fujitsu AOU18RLX Specifications

General

Brand	Fujitsu
Model	AOU18RLX
Category	Air Conditioner
Language	English