Fujitsu AOU18RLXFZH - Page 58

02-26
BLACK
BLUE
YELLOW
RED
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE / WHITE
1
2
3
4
5
6
7
8
1
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
CN39
VALVE THERMISTOR A
VALVE THERMISTOR C
, B
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
Trouble shooting 21
OUTDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
OKOK
OKOK
86°F
103176233312Resistance Value (k )
68°F
134
59°F50°F41°F32°F14°F 23°F
Temperature(°F)
39.6
25.6 17.1Resistance Value (k )
122°F
140°F 158°F
11.6
176°F
8.12
194°F
5.78
212°F
4.19 3.09
62.980.3
104°F
Temperature(°F)
3-Way Valve Thermistor Error
Outdoor Unit Main PCB Circuit
3-way valve Temperature Thermistor
When 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 miss-wiring, reset the power.
Check Point2: 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 Point3: Check voltage of Main PCB (DC5.0V)
M
AOU18RLXFZH
ake sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
If the voltage does not appear, replace Main PCB.
BLACK
BLUE
YELLOW
RED
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE
WHITE / WHITE
1
2
3
4
5
6
7
8
1
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
CN39
VALVE THERMISTOR A, B
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
BLACK
2-WAY VALVE A
3-WAY VALVE A
2-WAY VALVE B
3-WAY VALVE B
GRAY
BLACK
RED
RED
RED
RED
RED
RED
RED
1
2
3
4
5
6
7
8
1
2
4
5
6
7
8
1
2
3
4
5
6
7
8
9
C
2-WAY VALVE C
3-WAY VALVE C
BROWN
BLACK
WHITE / RED
1
4
5
6
7
8
6
9
CN40
2-WAY VALVE
3-WAY VALVE
AOU24RLXFZH
Indicate or Display:
Outdoor Unit : LED 1 : 6 time Flash (for Indoor unit A)
LED 2 : 6 time Flash (for Indoor unit B)
LED 3 : 6 time Flash (for Indoor unit C)
Indoor Unit : Operation lamp: 7 time Flash, Timer lamp: 6 time Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 76]
WHITE WHITE
WHITE