Fujitsu AOYG45LAT8 User Manual

Indoor Unit A, B, C, liquid pipe
thermistor error (CN309 / 310)
Branch Box Controller PCB
Indoor unit A,B,C Liquid pipe Thermistor
Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,
Economy LED Flashing (0.1s ON / 0.1s OFF)
Outdoor Unit : E. J2. U
Branch Box : LED402 6times Flash
(Indoor unit A): LED403 Lit, LED404/ 405 Unlit
(Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit
(Indoor unit C): LED403/ 404 Unlit, LED405 Lit
Error Code : J2
Trouble shooting 42
Indicate or Display:
Detective Actuators:
Detective details:
Branch Box Error Method:
Forecast of Cause :
Thermistor Characteristics (Rough value)
If Thermistor is either open or shorted, replace it and reset the power.
When open or shorted Liquid pipe Thermistor is detected.
Resistance Value (k )
Temperature (°C)
32.4
35
40.0
30
49.862.579.1100.9129.8168.6
2520151050
17.821.226.3
504540
OK
1. Connection failure 2. Thermistor failure 3. Controller PCB failure
Check Point 1 : Check connection of Connector
Check if connector is loose or removed
Check erroneous connection
Check if thermistor cable is open
>>Reset Power when reinstalling due to removed connector or incorrect wiring.
OK
Check Point 2 : Remove connector and check Thermistor resistance value
Check Point 3 : Check voltage of Controller PCB (DC5.0V)
Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)
Liquid pipe Thermistor (Unit A) (CN309 Wire:Black)
Liquid pipe Thermistor (Unit B) (CN309 Wire:Black)
Gas pipe Thermistor (Unit A) (CN309 Wire:Black)
Gas pipe Thermistor (Unit B) (CN309 Wire:Black)
Liquid pipe Thermistor (Unit C) (CN310 Wire:Black)
Gas pipe Thermistor (Unit C) (CN310 Wire:Black)
Schematic Diagram (Connector connection)
DC
Resistance Value (k )
Temperature (°C)
If the voltage does not appear, replace Controller PCB .
02-58

Fujitsu AOYG45LAT8 Specifications

General

Brand	Fujitsu
Model	AOYG45LAT8
Category	Air Conditioner
Language	English