Fujitsu AIRSTAGE V-II - Outdoor Temp Sensor Error

Outdoor Temp Sensor Error
OK
DC
CN144
(OUT TEMP.) THERMISTOR
1 2 3
1 2 3
B
LA
CK
BLA
C
K
Outdoor temperature thermistor
Outdoor temperature thermistor short or open detected
1. Connector connection defective, open
2. Thermistor defective
3. Main PCB defective
OK
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
Check Point 2: Check the thermistor
Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)
* For the thermistor characteristics, refer to the "Service Parts Information 22".
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN144:1-3) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
Outdoor temperature sensor (CN144:1-3)
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 74. 1
Error Code : 74
If the voltage does not appear, replace Main PCB and set up orignal address.
(Refer to 06-03 page Main PCB removal.)
If the voltage does not appear, replace Main PCB and set up orignal address.
04-39
Trouble shooting 31
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :