Fujitsu AB*G14LVTA - Page 62

Trouble shooting 22
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
OKOK
OKOK
3-way valve thermistor error
Outdoor unit Main PCB
3-way valve temperature thermistor
When the 3-way valve 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
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.
02-25
BLACK
RED
RED
RED
RED
RED
RED
RED
GRAY
BROWN
BLACK
BLUE
YELLOW
RED
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
RED
WHITE
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
4
5
6
7
8
9
CN40
CN39
VALVE THERMISTOR A, B
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
VALVE THERMISTOR D (For AOG30LAT4)
2-WAY VALVE C
3-WAY VALVE C
ORANGE
GREEN
2-WAY VALVE C
3-WAY VALVE C
Refer to error code table.
Thermistor Characteristics (Approx. value)
If Thermistor is either open or shorted, replace it and reset the power.
40
Resistance Value (k )
3020100-10-30 -20Temperature(°C)
Resistance Value (k )
60
70 80
50
Temperature(°C)
1131.9 579.6 312.3 176.0 103.3 62.9 39.6 25.6
17.1 11.6 8.1 5.8