Fujitsu AOU12RL2 Service Manual

Trouble shooting 11
OUTDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
6.1299.77512.4716.0520.8027.21Resistance Value (k )
Temperature
OKOK
OKOK
3.947
0.61150.85311.2131.7592.606Resistance Value (k )
Temperature
Outdoor unit Heat Ex. liquid temp.
sensor error
Outdoor unit Main PCB
Heat exchanger temperature thermistor
When Heat exchanger 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.
02-13
Indicate or Display:
Refer to error code table.
Check Point 3 :
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.
THERMISTOR
(PIPE)
THERMISTOR
(DISCHARGE)
THERMISTOR
(OUTDOOR)
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
1
2
3
4
1
2
3
4
1
2
3
1
2
3
CN71
CN70
80°C
(176°F)
70°C
(158°F)
40°C
(104°F)
50°C
(122°F)
60°C
(140°F)
30°C
(86°F)
5°C
(41°F)
0°C
(32°F)
-5°C
(23°F)
-10°C
(14°F)
20°C
(68°F)
10°C
(50°F)

Fujitsu AOU12RL2 Specifications

General

Brand	Fujitsu
Model	AOU12RL2
Category	Air Conditioner
Language	English