Fujitsu R410A Service Instruction

Trouble shooting 11
OUTDOOR UNIT Error Method:
OK
OK
18.126.9
20
41.164.581.8104.6134.9175.7Resistance value (k )
151050Temperature (°C )
12.5
30 5040 60
2.03.44.66.38.8Resistance value (k )
120100908070Temperature (°C )
Discharge Thermistor Error
Outdoor Unit Main PCB
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
Test 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 miss-wiring, reset the power.
Test 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.
Test 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.
Temperature (°F ) 324150596886104122140
Temperature (°F ) 158 176 194 212 248
CN64
CN62
1
2
1
2
33
1
2
1
2
33
BLUE
BLUE
BROWN
BROWN
THERMISTOR
( OUTDOOR TEMP. )
THERMISTOR
( COMPRESSOR TEMP. )
CN65
CN63
1
2
1
2
33
1
2
1
2
33
BROWN
BROWN
BLACK
BLACK
THERMISTOR
( DISCHARGE TEMP. )
THERMISTOR
( PIPE TEMP. )
02-13
Indicate or Display:
Outdoor Unit : No indication
Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 1 times Flash
Economy lamp: Continuous flash.
ERROR CODE : [E : 71]
Detective Actuators: Detective details:
Forecast of Cause:

Fujitsu R410A Specifications

General

Brand	Fujitsu
Model	R410A
Category	Air Conditioner
Language	English