Fujitsu AOYG45LAT8 User Manual page 105

Trouble shooting 40
Branch Box Error Method:
EEPROM access error
Detective Actuators:
Branch Box Controller PCB
Forecast of Cause : 1. External cause
Check Point 1-1 : Reset power supply and operate
Does error indication show reappear?
YES
Check Point 2 : Check connections condition.
Check all connectors.
(loose connector or incorrect wiring)
Check any shortage or corrosion on PCB.
OK
Check Point 3 : Replace Controller PCB
If Check Point 1, 2 do not improve the symptom,
replace Controller PCB.
Indicate or Display:
Outdoor Unit : E. J2. U
Branch Box : LED402 1time Flash, LED403/ 404/ 405 Unlit
Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,
Economy LED Flashing (0.1s ON / 0.1s OFF)
Error Code : J2
Detective details:
When power is on and the access to EEPROM failed.
2. Defective for connection in controller unit
NO
Check Point 1-2 : Check external cause such as noise
Check if the ground connection is proper.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
02-56
3. Controller PCB failure