Fujitsu AOU36RLX Service Instruction

Trouble shooting 3
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Outdoor Unit : No indication
ERROR CODE : E : 02 / 03
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 : Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 1 : Check connection of Connector
Check Point 3 : Check Point 3 : Check voltage of Controller PCB (DC5.0V)
6.51
95°F
(35°C)
8.04
86°F
(30°C)
10.012.515.820.225.933.6Resistance 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
OK
OK
3.594.355.30Resistance Value (k )
122°F
(50°C)
113°F
(45°C)
104°F
(40°C)
Temperature
THERMISTOR
(PIPE TEMP.)
THERMISTOR
(ROOM TEMP.)
GRAY GRAY
BLACK BLACK
CN7 CN8
1 2 1 2
Room Temperature Sensor Error
Indoor Unit Controller PCB Circuit
Room Temperature Thermistor
When Room Temperature Thermistor open or short-circuit is
detected at power ON.
1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure
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.
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Controller PCB.
02-07
1 2
Indoor Unit : Operation LED: 2 times blink, Timer LED: Blink,
Vertical swing LED: OFF / Blink

Fujitsu AOU36RLX Specifications

General

Brand	Fujitsu
Model	AOU36RLX
Category	Air Conditioner
Language	English