Fujitsu AOYG45LAT8 User Manual page 103

Trouble shooting 38
Branch Box Error Method:
Power frequency error 1
Detective Actuators:
Branch Box Controller PCB
Forecast of Cause :
1. Connection failure
Check Point 1-1 : Reset the power supply and operate
Does error indication reappear?
YES
Check Point 2 : Check connection
Check Cable/Breaker.
Check loose or removed connection.
>> If there is an abnormal condition, correct it by
referring to Installation Manual or Design &
Technical Manual.
OK
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>> Check if AC198V(AC220V-10%) - 264V(AC240V+10%) appears
at Branch Box terminal "Power" L1 - L2.
OK
Check Point 4 : Replace Controller PCB.
If Check Point 1 ~ 3 do not improve the symptom,
replace Controller PCB.
Indicate or Display:
Outdoor Unit : E. 11. 3 or E. 11. 4
Branch Box : LED401/ 402/ 403/ 404 Lit, LED405 Unlit
Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,
Economy LED Flashing (0.1s ON / 0.1s OFF)
Error Code : 11
Detective details:
When 4 continuous failures occurred at Power frequency test.
(Power supply of Branch Box)
2. External cause 3. Controller PCB failure
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).
02-54
AC