Fujitsu AB Series A18LATN User Manual

Trouble shooting 29
OUTDOOR UNIT Error Method:
Indicate or Display:
Outdoor Unit : LED 8 times blink
For AB*A36L/ 45L
ERROR CODE : No indication
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
4.77
25°C
5.98
20°C
7.569.6312.416.121.027.8Resistance Value (k )
15°C10°C5°C0°C-5°C-10°C
Temperature
OKOK
OKOK
DC
3.84
30°C
0.446
90°C
0.606
80°C
0.8401.191.712.082.533.11Resistance Value (k )
70°C60°C50°C45°C40°C35°C
Temperature
0.333
100°C
CN24 CN21 CN22 CN23 CN26 CN25
THERMISTOR (PIPE MID) THERMISTOR (DISCHARGE) THERMISTOR (PIPE OUT) THERMISTOR (OUTDOOR) THERMISTOR (COMPRESSOR) THERMISTOR (HEAT SINK)
BLACK BBROWN BLACK BLUE BROWN BLACK
Heat Sink Temperature Sensor Error
Outdoor Unit Main PCB Circuit
Heat Sink Temperature Thermistor
When Heat Sink 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.
07-30
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
( For AB*A36L/ 45L )

Fujitsu AB Series A18LATN Specifications

General

Brand	Fujitsu
Model	AB Series A18LATN
Category	Air Conditioner
Language	English