Sub Cool Heat Ex. Gas Outlet Thermistor Error - Fujitsu AOYG45LAT8 User Manual

Trouble shooting 24
OUTDOOR UNIT Error Method:
Sub-cool Heat Ex. Gas Outlet
Thermistor Error
Detective Actuators:
Sub-cooling heat exchanger gas outlet
temperture thermistor
Forecast of Cause :
1. Connector connection failur, open
2. Thermistor failure
3. Main PCB failure
Check Point 1 : Check the connector connection and cable open
Connector connection state check
Cable open check
OK
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 5".
OK
Check Point 3 : Check voltage of Main PCB (DC5.0V)
Main PCB (CN63:4-5) voltage value = 5V
Remove the thermistor from Main PCB, check the voltage.
1 2 3 4 5
1 2 3 4
Heat exchanger liquid outlet thermistor (CN63:4-5)
If the voltage does not appear, replace Main PCB
and execute the check operation again.
Indicate or Display:
Outdoor Unit : E. 82. 2
Indoor Unit
Error Code
Detective details:
Sub-cooling heat exchanger gas outlet temperture thermistor short or
open detected
5
CN63
: Operation LED 8 times Flash, Timer LED 2 Times Flash,
Economy LED Continuous Flash.
: 82
DC
,
02-40