Fujitsu AOU36RLX Service Instruction

Trouble shooting 4
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Outdoor Unit : No indication
ERROR CODE : E : 04 / 05
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
31.7
95°F
(35°C)
39.6
86°F
(30°C)
49.762.980.3103134176Resistance Value (k )
77°F
(25°C)
68°F
(20°C)
59°F
(15°C)
50°F
(10°C)
41°F
(5°C)
32°F
(0°C)
Temperature
OKOK
OK
17.120.825.6Resistance Value (k )
122°F
(50°C)
113°F
(45°C)
104°F
(40°C)
Temperature
Indoor Heat Exchanger Temperature
Sensor Error
Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
When Heat Exchanger Temperature Thermistor open or short-circuit is
detected at power ON.
1. Connector connection failure 2.Thermistor failure 3. Controller 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 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.
THERMISTOR
(PIPE TEMP.)
THERMISTOR
(ROOM TEMP.)
GRAY GRAY
BLACK BLACK
CN7 CN8
1 2 1 2
1 2
02-08
Indoor Unit : Operation LED: 3 times blink, Timer LED: Blink,
Vertical swing LED: OFF / Blink

Fujitsu AOU36RLX Specifications

General

Brand	Fujitsu
Model	AOU36RLX
Category	Air Conditioner
Language	English