Fujitsu ARTG60LHTA - Page 66

Trouble shooting 19
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
OKOK
OKOK
Compressor temp. sensor error
Outdoor unit Main PCB
Compressor temperature thermistor
When Compressor 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.
02-21
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. )
Resistance Value (k )
Temperature(°C)
Resistance Value (k )
Temperature(°C)
-30 -20 -10 0 10 20 30 40 50
60 70 80 90 100 110 120
1013.1 531.6 292.9 168.6 100.9 62.5 40.0 26.3 17.8
12.3 8.7 6.3 4.6 3.4 2.6 2.0
CN22
CN23
CN24
CN25
CN26
CN27