Fujitsu AS*12LMACW Service Instruction

Trouble shooting 8
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Check Point 2 :
Check Point 3 :
17.826.3
20°C
40.062.579.1101130169Resistance Value (k )
15°C10°C5°C0°CTemperature
OKOK
OKOK
12.3
30°C
50°C40°C
60°C
0.52
180°C
0.79
160°C
1.222.003.434.606.278.69Resistance Value (k )
140°C120°C100°C 90°C80°C70°CTemperature
Outdoor Discharge Pipe Temperature
Thermistor Error
Outdoor Unit Main PCB Circuit
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.
02-18
THERMISTOR (DISCHARGE)
THERMISTOR (PIPE) THERMISTOR (OUTDOOR) THERMISTOR (HEAT SINK)
BROWN BLACK BLACK BLUE
CN25 CN23 CN22 CN21
1 21 21 21 2
Refer to error code table.

Fujitsu AS*12LMACW Specifications

General

Brand	Fujitsu
Model	AS*12LMACW
Category	Air Conditioner
Language	English