Fujitsu AOYG45LAT8 User Manual page 111

Trouble shooting 45
Branch Box Error Method:
Remote controller communication
error
Detective Actuators:
Branch Box Controller PCB
Home controller
Forecast of Cause :
1. Terminal connection abnormal
Check Point 1 : Check the connection of terminal
After turning off the power, check & correct the followings.
Branch box - Check the connection of terminal between Home controller and Branch box,
or between other Branch boxes, and check if there is a disconnection or short of the cable.
OK
Check Point 2 : Check Home controller and Controller PCB
Check terminal voltage of controller PCB Connector (CN304). (Power supply for Home controller)
If DC12V, Home controller failure (Controller PCB is OK) >>> Replace Home controller
If DC0V, Controller PCB failure
In case of re-installation is done due to removed connector or incorrect
wiring, turn on the power again.
Indicate or Display:
Outdoor Unit : E. J2. U
Branch Box : LED402 9times Flash, LED403/ 404/ 405 unlit
Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,
Error Code : J2
Detective details:
More than 1 time of signal from Home controller and other Branch box
is received, but it was not received more than 1 minute.
Upon receiving the signal more than 1 time from Home controller,
but the same signal has not been received more than 1 minute.
2. Home Controller failure
(Remote is OK) >>> Replace Controller PCB
02-62
Economy LED Flashing (0.1s ON / 0.1s OFF)
3. Controller PCB failure
DC