Fujitsu AOU12RL2 Service Manual

Trouble shooting 5
INDOOR UNIT
INDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
62.9102.1131.4170.7223.3295.1Resistance Value (k )
Temperature
OKOK
OK
17.1125.839.78Resistance Value (k )
Temperature
Indoor unit Heat Ex. middle temp.
sensor error
Indoor unit Controller PCB
Heat Ex. temperature thermistor
When Heat Ex. temperature thermistor open or short-circuit is detected.
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.
02-07
20°C
(68°F)
10°C
(50°F)
5°C
(41°F)
0°C
(32°F)
-5°C
(23°F)
-10°C
(14°F)
50°C
(122°F)
11.6
60°C
(140°F)
10.36
63°C
(144°F)
40°C
(104°F)
30°C
(86°F)
Indicate or Display:
Refer to error code table.
THERMISTOR
(ROOM TEMP.)
THERMISTOR
(PIPE)
BLACK
CN4
1
2
3
4
1
2
3
4
BLACK
BLACK
BLACK

Fujitsu AOU12RL2 Specifications

General

Brand	Fujitsu
Model	AOU12RL2
Category	Air Conditioner
Language	English