Fujitsu ARTG60LHTA

Trouble shooting 21
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
OKOK
OKOK
Outdoor temp. sensor error
Outdoor unit Main PCB
Outdoor temperature thermistor
When Outdoor 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 if connector is 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.
02-23
Refer to error code table.
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BROWN
BROWN
BROWN
BROWN
BLUE
BLUE
123 123
123 12312
1212
12
123 123 123 123
THERMISTOR
( HEAT EXCHANGER MID. )
THERMISTOR
( HEATSINK PFC )
THERMISTOR
( DISCHARGE PIPE )
THERMISTOR
( HEAT EXCHANGER OUT )
THERMISTOR
( OUTDOOR TEMP. )
THERMISTOR
( COMPRESSOR TEMP. )
50
Resistance Value (k )
403020100-30 -20 -10Temperature(°C)
Resistance Value (k )
70 8060Temperature(°C)
224.3 115.2 62.3 35.2 20.7 12.6 8.0 5.2
3.5 2.4 1.6 1.2
CN22
CN23
CN24
CN25
CN26
CN27