Fujitsu AOU09RL2, Service Instructions Manual

Page: 35 / 62

Trouble shooting 10
INDOOR UNIT
OUTDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
64.22 102.5 130.9 168.6 218.6 286.3 Resistance Value (k )
Temperature
OK OK
OK OK
41.33
1.956 3.430 4.639 6.375 8.909 Resistance Value (k )
Temperature
Discharge temp. sensor error
Outdoor unit Main PCB
Discharge pipe temperature thermistor
When Discharge pipe 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.
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.
02-12
90°C
(194°F)
80°C
(176°F)
70°C
(158°F)
27.26
40°C
(104°F)
18.40
50°C
(122°F)
12.68
60°C
(140°F)
30°C
(86°F)
100°C
(212°F)
2.573
110°C
(230°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)
120°C
(248°F)
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
Indicate or Display:
Refer to error code table.