Fujitsu ARTG60LHTA

Trouble shooting 22
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators: Detective details:
Forecast of Cause :
OKOK
OKOK
Heat sink temp. sensor error
Outdoor unit Inverter PCB
Heat sink temperature thermistor (PFC)
Heat sink temperature thermistor (INV)
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. Inverter 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 Inverter 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 Inverter PCB.
02-24
Refer to error code table.
BLACK
BLACK
CN803
1
2
1
2
THERMISTOR
( HEATSINK INV.)
94.3 49.6 27.4 15.8 9.5 5.9 3.8 2.5
1.7 1.2 0.8 0.6 0.4
50
Resistance Value (k )
403020100-30 -20 -10Temperature(°C)
Resistance Value (k )
70 80 89.560Temperature(°C)
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. )
CN22
CN23
CN24
CN25
CN26
CN27